History Biographies, History, Philosophy of Physics

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The discussion highlights the often-overlooked contributions of lesser-known physicists in the field, emphasizing that many have made significant advancements without receiving the recognition they deserve. Participants express disappointment that only controversial figures tend to gain prominence, while countless others remain in obscurity. Various biographies and historical accounts of physicists are shared, including works on notable figures like the Curies and lesser-known scientists like Titus Pankey. The conversation also touches on the importance of collecting and sharing these narratives to enrich the understanding of physics history. Overall, the thread advocates for greater appreciation of all contributors to the field of physics.
  • #201
On a more serious note and spurred on by this thread: RIP Jayant Narlikar (1938-2025)

I dug this one up:

Jayant Vishnu Narlikar

An essay on Jyant Narlikar in the Living Legends of Indian Science series of the journal Current Science.
 
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  • #202
sbrothy said:
I cannot take this paper even remotely serious:

Quantum Panprotopsychism and a Consciousness-centered Universe

Even though I know panpsychism is an "established" philosophical theory, the word "panprotopsychism" just gives me the screaming heebie-jeebies! And what is it with connecting consciousness with quantum mechanics? Yeah I know, the observer thingy and whatnot but it just reeks of meta-metaphysics!

It may be that it's prefectly serious (certainly the authors seem to take it seriously). I just can't.
I understood just about none of that :cry: and gave up a couple of pages in in favour of finishing the book I was reading

sbrothy said:
On a more serious note and spurred on by this thread: RIP Jayant Narlikar (1938-2025)

I dug this one up:

Jayant Vishnu Narlikar
😞 🙏
 
  • #203
sbrothy said:
I cannot take this paper even remotely serious:

Quantum Panprotopsychism and a Consciousness-centered Universe

Even though I know panpsychism is an "established" philosophical theory, the word "panprotopsychism" just gives me the screaming heebie-jeebies! And what is it with connecting consciousness with quantum mechanics? Yeah I know, the observer thingy and whatnot but it just reeks of meta-metaphysics!

It may be that it's prefectly serious (certainly the authors seem to take it seriously). I just can't.
I didn't want to investigate this paper further than reading the abstract since I share your opinion. Considering consciousness as a consequence of quantum mechanics isn't new. It tries to link its randomness, better, uncertainty to the randomness of individuality. To me, this is an artificial bridge resulting from the lack of understanding of both.

What remains is the observation that the universe created an entity, us, that investigates itself, and it knows about this fact. Hence, the university has self-awareness, and the philosophical consequences of this observation are part of this investigation. Whether this is sufficient to attribute consciousness to the universe is a different, philosophical question. And whether this is due to quantum mechanical principles is a bit far-fetched in my opinion. To me, it is more of a modern version of worshiping the sun god than a real correlation or cause. However, as long as people do not know what the sun is, or Kepler's laws, as long as there will be people justifying the sun god.
 
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  • #204
Then there's the esoteric philosophy of pre-post-panprotopsychism.
 
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  • #205
Hornbein said:
Then there's the esoteric philosophy of pre-post-panprotopsychism.
Yeah, it turtles all the way down! :woot:
 
  • #206
This is at odds with the current view about the human condition that was strongly influenced by a science based on classical mechanicism, and led to nihilism and existentialism in late 19th-century Europe, and more recently to the rise of anti-foundationalists perspectives. The centrality of consciousness resulting from the incorporation of a quantum ontology into our worldview leads us to reconsider the nihilistic view and conclude that we live in a world in which a precise physical order leads to people capable of accessing a transcendent phenomenal realm.

To me, this is word salad. It seems to be in line with what other aging scientists have published at the end of their lives. I'm particularly thinking about Michael Francis Atiyah and his claim to have solved the RH, or of what I personally witnessed, a lecture by Konrad Zuse in the early 90s, and his early 80s about his current "research". It is a bit sad when such stories overshadow earlier, great achievements.
 
  • #207
Speaking of word salad. It kind of reminds of Immanuel Kant, who was apparently a little vain:

"[...] Kant was baptized as Emanuel and later changed the spelling of his name to Immanuel after learning Hebrew. [...]"
---- Wikipedia (cf: Kuehn, Manfred (2001). Kant: a Biography. Cambridge University Press.)

Maybe being Jewish was just in at the time?!

Sorry for the aside. What I wanted to say was that, when I was younger, I tried to read his books but found it nigh on impossible. Of course much of it was due to the fact that I'm just not that smart, and that my attention span leaves a lot to be desired, especially in the context of metaphysic philosophers such as Kant. Still, as a product of his time, he argued:

"[...] that the human understanding is the source of the general laws of nature that structure all our experience; and that human reason gives itself the moral law, which is our basis for belief in God, freedom, and immortality. Therefore, scientific knowledge, morality, and religious belief are mutually consistent and secure because they all rest on the same foundation of human autonomy, which is also the final end of nature according to the teleological worldview of reflecting judgment that Kant introduces to unify the theoretical and practical parts of his philosophical system. [...]"

(Again one of those words which gives the willies: "teleological".)

Although he may have been inspired by Newton he couldn't escape his religious views.

"[...] Although now recognized as one of the greatest works in the history of philosophy, the Critique disappointed Kant's readers upon its initial publication. The book was long, over 800 pages in the original German edition, and written in a convoluted style. Kant was quite upset with its reception. [...]

I'm not entirely sure what the word "greatest" is supposed to mean here. I can just imagine him complaining that he was surrounded by idiots! I guess it's really no wonder I couldn't make it to the end. :smile:
 
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  • #208
sbrothy said:
Speaking of word salad. It kind of reminds of Immanuel Kant, who was apparently a little vain:


---- Wikipedia (cf: Kuehn, Manfred (2001). Kant: a Biography. Cambridge University Press.)

Maybe being Jewish was just in at the time?!

Sorry for the aside. What I wanted to say was that, when I was younger, I tried to read his books but found it nigh on impossible. Of course much of it was due to the fact that I'm just not that smart, and that my attention span leaves a lot to be desired, especially in the context of metaphysic philosophers such as Kant. Still, as a product of his time, he argued:



(Again one of those words which gives the willies: "teleological".)

Although he may have been inspired by Newton he couldn't escape his religious views.



I'm not entirely sure what the word "greatest" is supposed to mean here. I can just imagine him complaining that he was surrounded by idiots! I guess it's really no wonder I couldn't make it to the end. :smile:
Immanuel Kant is a name I've heard again and again in our PER (Philosophy, Ethics, Religion) lessons. Some of his philosophies are really interesting.
That being said, I also find them extremely confusing. My brain often ends up going on tangents after PER lessons.
Newton himself couldn't escape his religious views: he was definitely deeply religious and I remember reading in some book somewhere about how he chose to believe in absolute time because he thought it would violate his religious views if time were otherwise.

Don't quote me on that last one though... I really can't remember where I got it from...
 
  • #209
Yeah, about Newton there was also something about his rotating bucket-on-a-rope thought-experiment that he knew was wrong but he couldn't put his finger on it. Can't remember if it violated the no-special-frame-of-reference or it was more involved. I'm just about to turn in. Don't want to read a lot right now....

EDIT: Or maybe he *could* put his finger on it but choose to ignore it.
 
  • #210
sbrothy said:
Yeah, about Newton there was also something about his rotating bucket-on-a-rope thought-experiment that he knew was wrong but he couldn't put his finger on it. Can't remember if it violated the no-special-frame-of-reference or it was more involved. I'm just about to turn in. Don't want to read a lot right now....

EDIT: Or maybe he *could* put his finger on it but choose to ignore it.
Oh I haven't heard of that specific one: though I can imagine it was the frame of reference thing: maybe something about the pseudo "centrifugal force" that he couldn't put his finger on.
Time to make the extremely mature and totally responsible decision, the opposite of what you did: read up on it and stay up later than I should. (Pray it doesn't take more than 10mins to get to the bottom of) :woot:
Meh, I had a maths problem to finish anyway. wasn't going to sleep on time either way is my excuse.
 
  • #211
[...] The famous bucket example that follows is offered as illustrating how forces can be distinguished that will then distinguish between true and apparent motion. The final paragraph of the scholium begins and ends as follows:

It is certainly very difficult to find out the true motions of individual bodies and actually to differentiate them from apparent motions, because the parts of that immovable space in which the bodies truly move make no impression on the senses. But the situation is not utterly hopeless…. But in what follows, a fuller explanation will be given of how to determine true motions from their causes, effects, and apparent differences, and, conversely, of how to determine from motions, whether true or apparent, their causes and effects. For this was the purpose for which I composed the following treatise.

What does follow are two books of propositions that provide means for inferring forces from motions and motions from forces and a final book that illustrates how these propositions can be applied to the system of the world first to identify the forces governing motion in our planetary system and then to use them to differentiate between certain true and apparent motions of particular interest. In this respect, the empirical content of the theoretical concepts that Newton has explicated in the section called “Definitions” is inextricably linked with the physical theory presented in the rest of the Principia.

The contention that the empirical reasoning in the Principia does not presuppose an unbridled form of absolute time and space should not be taken as suggesting that Newton's theory is free of fundamental assumptions about time and space that have subsequently proved to be problematic. For example, in the case of space, Newton presupposes that the geometric structure governing which lines are parallel and what the distances are between two points is three-dimensional and Euclidean. In the case of time Newton presupposes that, with suitable corrections for such factors as the speed of light, questions about whether two celestial events happened at the same time can in principle always have a definite answer. And the appeal to forces to distinguish real from apparent non-inertial motions presupposes that free-fall under gravity can always, at least in principle, be distinguished from inertial motion.

Equally, the contention that the empirical reasoning in the Principia does not presuppose an unbridled form of absolute space should not be taken as denying that Newton invoked absolute space as his means for conceptualizing true deviations from inertial motion. Corollary 5 to the Laws of Motion, quoted above, put him in a position to introduce the notion of an inertial frame, but he did not do so, perhaps in part because Corollary 6 showed that even using an inertial frame to define deviations from inertial motion would not suffice. Empirically, nevertheless, the Principia follows astronomical practice in treating celestial motions relative to the fixed stars, and one of its key empirical conclusions (Book 3, Prop. 14, Corol. 1) is that the fixed stars are at rest with respect to the center of gravity of our planetary system.[...]
---- Newton’s Philosophiae Naturalis Principia Mathematica (Stanford)

Stumbled across these two too. YMMV.

Newton's Old Bucket Experiment and the Modern Liquid Telescope
The quantum Newton's bucket: Active and passive rotations in quantum theory
 
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  • #212
sbrothy said:
---- Newton’s Philosophiae Naturalis Principia Mathematica (Stanford)

Stumbled across these two too. YMMV.

Newton's Old Bucket Experiment and the Modern Liquid Telescope
The quantum Newton's bucket: Active and passive rotations in quantum theory
I just spent 10 minutes reading this wiki page about it and then decided I better get cracking on my maths problem and go to sleep before like 2am :)
Quantum theory? I will be reading that!
But maybe not now... I told myself I would sleep early tonight...
 
  • #213
Not much to report from here recently. I mean papers bluntly define themselves as metaphysics and iterate all the really hard problems but provide mostly speculation (Sorry if that offends any authors. I can't hold a candle to their efforts, metaphysical or not. I just don't feel I get much out of it.).

On something and nothing: The interface of two types of nothing (arXiv)

We suggest that the question of why is there something rather than nothing can be answered by the existence of two types of nothing. We propose that matter occurs at the boundaries of intersection of both nothings. This accords with the common view that there are three worlds; the platonic world of concepts, the material world (i.e. of matter), and the non-material world (i.e. of consciousness). Both the material and non-material worlds have their own type of nothing, thus leading to the proposal. The interpretation provides an alternative type of duality distinct from property or substance dualism, and may unify the two. The interpretation also has implications for the understanding of physical causation, and Mach's principle as the boundary of intersection provides a return to the aether concept.
 
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  • #214
We propose that matter occurs at the boundaries of intersection of both nothings.

They are right. There is a nothing on the left and on the right of me. I waved my arms, but there was nothing.
 
  • #215
Exactly my point. I just don't have the heft like you do to outright call it bunk. :woot:

EDIT: Well, what do you know, I kinda did anyway.
 
  • #216
sbrothy said:
Exactly my point. I just don't have the heft like you do to outright call it bunk. :woot:

EDIT: Well, what do you know, I kinda did anyway.
I once made an account on one of these "we publish everything" platforms, more or less out of curiosity. Then someone posted about my article about Fermat's last theorem, and he had an article about his take on "a new proof" so I had a glimpse of it to check how serious this was. Well, it wasn't. And ever since, I get notifications about every article on that platform that deals with FLT. You won't believe how many people still try to solve this already solved problem, which also required heavy machinery to prove it. Hence, if you are interested in junk, let me know. :biggrin:
 
  • #217
Oh I'm a sucker for junk but my inbox is already brimming, so thank you very much. :smile:

EDIT: But hey.... what you're saying is that you have a viXra account?! :woot:
 
  • #218
sbrothy said:
Oh I'm a sucker for junk but my inbox is already brimming, so thank you very much. :smile:

EDIT: But hey.... what you're saying is that you have a viXra account?! :woot:
academia.edu

I used the name of my grandpa, which is quite old-fashioned and uncommon. Now, I get dozens of notifications along the lines "xyz mentioned your name". Funny.
 
  • #219
sbrothy said:
Oh I'm a sucker for junk but my inbox is already brimming, so thank you very much. :smile:

EDIT: But hey.... what you're saying is that you have a viXra account?! :woot:

Sorry for those EDITs. It's hard to know what you "like" if my posts gets edited seconds later. Just ignore it.
 
  • #220
sbrothy said:
Sorry for those EDITs. It's hard to know what you "like" if my posts gets edited seconds later. Just ignore it.
I edited mine, too, between your like. Lol.
 
  • #221
fresh_42 said:
academia.edu

I used the name of my grandpa, which is quite old-fashioned and uncommon. Now, I get dozens of notifications along the lines "xyz mentioned your name". Funny.

Yes. I get those too. According to my inbox I have an Erdős number of -1.
 
  • #222
sbrothy said:
Yes. I get those too. According to my inbox I have an Erdős number of -1.
I once calculated mine and arrived at 4. I know of a member who has 3.
 
  • #223
arXiv: physics.hist-ph; gr-qc. History and Philosophy of Physics. 1824 book review.

Reflections of Sadi Carnot

The Carnot theory is unique among the theories of heat developed before the emergence of thermodynamics because it considers the relationship between heat and work. The theory is contained in Carnot's book published in 1824, which includes the basic ideas on how thermal machines work, including the need for a temperature difference. The fundamental principle of the theory is stated with the help of a cyclic process invented by Carnot, involving two isotherms and two adiabatics. The ratio between the mechanical work produced during the cycle and the heat involved depends only on the temperatures. We make a critical analysis of Carnot theory and show how the fundamental principle was used by Clausius to define entropy in terms of which he enunciated the second law of thermodynamics.

A Theory of the Big Bang in McTaggart's Time

There are long standing questions about the Big Bang What were its properties? Was there nothing before it? Was the universe always here? Many conceptual issues revolve around time. This paper gives a novel model based on McTaggarts temporal distinction between the A-series future-present-past and B-series earlier-times to later times. These series are useful while situated in a Presentist and Fragmentalist account of quantum mechanics, one in which the consistency with the Special Relativity in particular the relativity of simultaneity will be made explicit section 6. This allows us to make a fruitful distinction between two pertinent questions what happens as we go to earlier times toward the Big Bang? And: what happens as we go further into the past toward the Big Bang?
 
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  • #224
Fixed.
 
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  • #225
Paul Merriam's arXiv paper reads more like philosophy, with a capital P, not physics. All of its recent references appear in philosophy journals. Is it suitable for posting on PF?
 
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  • #226
renormalize said:
McTaggart's arXiv paper reads more like philosophy, with a capital P, not physics. All of its recent references appear in philosophy journals. Is it suitable for posting on PF?

I understand your critique. And yeah, much of it is philosophy with a capital P. I should perhaps be more selective but I honestly think philosophy of physics serves a purpose when done right.

I should perhaps update the title, clean up the thread and await a moderator judgement.

Also, it is in one of the softer forums and often related to history.

This one for example:

Post in thread 'Biographies, history, personal accounts'
https://www.physicsforums.com/threads/biographies-history-personal-accounts.1060020/post-7075808

EDIT: It should also be mentioned that some of the more speculative P papers are posted tongue in cheek and ridiculed a little.
 
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  • #227
What say a moderator, for instance @berkeman ? Have I taken it too far? Would it help if I cleaned it up, loosing some of the more metaphysical papers, and not so serious posts, in the process? Maybe changing the title to a more honest one?

To be honest the thought struck me before and here is now legitimate criticism....

EDIT: I think there is legitimate information here but YMMV.
 
  • #228
OK then. I'll clean up the thread. Get rid of some of the more blatant metaphysics unless it elicits a smile.
 
  • #230
arXiv: physics.hist-ph; hep-ph; hep-th; math-ph. History, biography.

A.P. Balachandran: Living in Physics

A.P. Balachandran was a theoretical physicist of extraordinary versatility and originality. In a career spanning over six decades, he made many significant contributions to quantum field theory and mathematical physics. His influence extends beyond the impact of his papers, with a large number of research students and collaborators. Here, in an attempt at a coherent scientific biography, I try to contextualize and evaluate his many contributions.
 
  • #231
arXiv: physics.hist-ph; gr-qc; hep-th. History, biography.

James Burkett Hartle: a Biographical Memoir

James Burkett Hartle was a theoretical physicist who made major contributions to our understanding of relativistic stars, black holes, and cosmology. Most of his career, however, was devoted to studying the universe as a quantum system. As a result, he was known as the father of quantum cosmology. He is best known for two seminal papers with Stephen Hawking that introduced two quantum states of fundamental importance: the "Hartle-Hawking vacuum" for matter fields outside a black hole, and the "no-boundary wave function of the universe" for cosmology. Jim (as everyone called him) was a warm and caring person who was genuinely concerned with the success of his students, postdocs, and colleagues. He was generous with his time and helped to foster a culture of a welcoming family among gravitational physicists.


EDIT: I guess you could say people where gravitating around him! :sorry:
 
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  • #232
Got the names mixed up there....
 
  • #233
fresh_42 said:
To me, this is word salad. It seems to be in line with what other aging scientists have published at the end of their lives. I'm particularly thinking about Michael Francis Atiyah and his claim to have solved the RH, or of what I personally witnessed, a lecture by Konrad Zuse in the early 90s, and his early 80s about his current "research". It is a bit sad when such stories overshadow earlier, great achievements.
Now you spurred my interest and Konrad Zuse seems to be on the level at a first glance:

The Design Principles of Konrad Zuse's Mechanical Computers

Konrad Zuse built the Z1, a mechanical programmable computing machine, between 1935/36 and 1937/38. The Z1 was a binary floating-point computing device. The individual logical gates were constructed using metallic plates and interconnection rods. This paper describes the design principles Zuse followed in order to complete a complex calculating machine, as the Z1 was. Zuse called his basic switching elements "mechanical relays" in analogy to the electrical relays used in telephony.

But i admit I haven't read the entire paper.
 
  • #234
Recent post on George Smoot has many links and videos.
 
  • #237
  • #238
arXiv: physics.hist-ph, hep-th. History and Philosophy of Physics

These 2 looks interesting IMHO:

On functional freedom and Penrose's critiques of string theory

In his The Road to Reality as well as in his Fashion, Faith and Fantasy, Roger Penrose criticises string theory and its practitioners from a variety of angles ranging from conceptual, technical, and methodological objections to sociological observations about the string theoretic scientific community. In this article, we assess Penrose's conceptual/technical objections to string theory, focussing in particular upon those which invoke the notion of `functional freedom'. In general, we do not find these arguments to be successful.


Lorentz, Poincaré, and Einstein: Rethinking Doppler, Aberration, and the Fresnel Drag

This paper examines Lorentz's 1895 derivations of the classical Doppler formula and Fresnel drag, Einstein's 1905 derivation of the relativistic Doppler effect and aberration, and Einstein's 1907 kinematical route to the exact velocity composition law from which Fresnel drag is obtained as a low-velocity limit. Einstein acknowledged that he had read Lorentz's "Versuch" well before 1905. In 1907, Einstein identified Lorentz's "Versuch" as a crucial precursor to relativity. In that work, Lorentz had already invoked local time to derive Fresnel's drag coefficient from Maxwell's equations. There is a genuine "family resemblance" between Lorentz's and Einstein's treatments in that both preserve the phase of a plane wave under transformation. Yet I demonstrate that this resemblance is only formal. I also discuss the absence of the relativistic Doppler and aberration laws in Poincaré's Dynamics of the Electron.
 
  • #239
arXiv: physics.hist-ph, astro-ph.IM. History and Philosophy of Physics.

Inspiring stories from women in astronomy in Africa

In preparation for the International Astronomical Union (IAU) General Assembly (GA) 2024, the first GA held in Africa, the African Network of Women in Astronomy (AfNWA) embarked on a visionary project: the creation of an inspiring storytelling book that showcases the remarkable journeys of professional female astronomers in Africa. This book is not merely a collection of biographies; it is a tapestry of resilience, passion, and scientific excellence woven through the lives of women who have ventured into the cosmos from the African continent. The primary aim of this book is twofold. Firstly, it seeks to bring greater visibility to women astronomers in Africa, highlighting their groundbreaking research and the personal stories that have shaped their careers. By shining a light on their achievements and awards, we hope to acknowledge their contributions to the field of astronomy and underscore the importance of diversity in science. Secondly, this book aspires to inspire and empower the next generation of scientists, particularly young women and girls across Africa. Through the personal narratives and professional achievements of these trailblazing astronomers and students in astronomy, we aim to spark curiosity, foster a love for science, and demonstrate that the sky is not the limit but just the beginning for those who dare to dream. As you delve into the stories within these pages, you will encounter a rich array of experiences and insights that reflect the unique challenges and triumphs women face in astronomy. From overcoming societal barriers to making groundbreaking discoveries, these women have carved paths that others can follow, proving that with determination and passion, the stars are within reach for everyone.

Comment on "Comment on Galina Weinstein's article entitled 'Convergences and Divergences: Einstein Poincaré and Special Relativity'"

This paper provides a systematic response to the criticisms raised by Jean-Marc Ginoux in response to my review of his book on the history of relativity. Whereas my review was written in a strictly academic manner, Ginoux's commentary intermingles mathematical objections with ad hominem insinuations about both Einstein and me. The purpose of this reply is twofold: first, to clarify the historiographical and conceptual issues at stake in the interpretation of Einstein's 1905 paper and Poincaré's contributions of 1905--1906; and second, to demonstrate why the conflation of algebraic form with conceptual content leads to distorted conclusions.
 
  • #241
As I told @AlexB23 in a DM I now have to actually read what I post to not look like I'm just making noise! :woot:

But seriously, it's all on my reading list (one of the reasons I post it here: to be able to find it again as it really does interest me). Unfortunately, I've got a lot of personal reasons for being behind on my list. I'll answer it when I get there.....
 
  • #242
sbrothy said:
As I told @AlexB23 in a DM I now have to actually read what I post to not look like I'm just making noise! :woot:

But seriously, it's all on my reading list (one of the reasons I post it here: to be able to find it again as it really does interest me). Unfortunately, I've got a lot of personal reasons for being behind on my list. I'll answer it when I get there.....
So true. Just take your time, man.
 
  • #243
arXiv: physics.hist-ph; gr-qc; physics.bio-ph. History and philosophy of Physics.

I'm not claiming that I know what this is about but at least it's history:

Is Gravity Truly Balanced? A Historical-Critical Journey Through the Equivalence Principle and the Genesis of Spacetime Geometry

We present a novel derivation of the spacetime metric generated by matter, without invoking Einstein's field equations. For static sources, the metric arises from a relativistic formulation of D'Alembert's principle, where the inertial force is treated as a real dynamical entity that exactly compensates gravity. This leads to a conformastatic metric whose geodesic equation, parametrized by proper time, reproduces the relativistic version of Newton's second law for free fall. To extend the description to moving matter, uniformly or otherwise, we apply a Lorentz transformation to the static metric. The resulting non static metric accounts for the motion of the sources and, remarkably, matches the weak field limit of general relativity as obtained from the linearized Einstein equations in the de Donder or Lorenz gauge. This approach, at least at Solar System scales, where gravitational fields are weak, is grounded in a new dynamical interpretation of the Equivalence Principle. It demonstrates how gravity can emerge from the relativistic structure of inertia, without postulating or solving Einstein's equations.


All this talk about quantum consciousness elsewhere, so I get this is sorta relevant:

Agency cannot be a purely quantum phenomenon

What are the physical requirements for agency? We investigate whether a purely quantum system (one evolving unitarily in a coherent regime without decoherence or collapse) can satisfy three minimal conditions for agency: an agent must be able to create a world-model, use it to evaluate the likely consequences of alternative actions, and reliably perform the action that maximizes expected utility. We show that the first two conditions conflict with the no-cloning theorem, which forbids copying unknown quantum states: world-model construction requires copying information from the environment, and deliberation requires copying the world-model to assess multiple actions. Approximate cloning strategies do not permit sufficient fidelity or generality for agency to be viable in purely quantum systems. The third agency condition also fails due to the linearity of quantum dynamics. These results imply four key consequences. First, agency requires significant classical resources, placing clear constraints on its physical basis. Second, they provide insight into how classical agents emerge within a quantum universe. Third, they show that quantum computers cannot straightforwardly simulate agential behavior without significant classical components. Finally, they challenge quantum theories of agency, free will, and consciousness.
 
  • #244
arXiv: physics.hist-ph. History and philosophy of Physics.

Cosmology and Philosophy

Scientific cosmology has now reached its period of maturity with the establishment of a standard model, which is the theory of an expanding universe. The question of whether this expansion resolves itself, in the past, into a singularity identifiable with an absolute beginning, or whether the universe in which we are is only one of the multiple possible universes existing either in space or in time, is still under debate. Moreover, the assimilation of the beginning of the universe to a "creation" has often been contested by theology, which, since Thomas Aquinas, if not since the Fathers of the Church, tends to carefully distinguish the two. In the following article, after briefly summarizing some points in the recent history of scientific cosmology, we will attempt to present in broad outline the standard model that scientists have arrived at. Then, we will undertake to study some of the problems it raises as well as the alternative theories that can be opposed to it. Finally, we will discuss the problematic links that scientific cosmology continues to maintain with philosophy and theology, notably the thorny question of creation from nothing ({\it creatio ex nihilo}).
 
  • #245
Oh, I seem to have overlooked this one:

arXiv: physics.hist-ph, cond-mat.dis-nn, cond-mat.str-el, cond-mat.supr-con, hep-th. History and Philosophy of Physics. A biographical memoir of P. W. Anderson to be published in Biographical Memoirs of Fellows of the Royal Society.

Philip Warren Anderson

Philip Warren Anderson was a pioneering theoretical physicist whose work fundamentally shaped our understanding of complex systems. Anderson received the Nobel Prize in Physics in 1977 for his groundbreaking research on localization and magnetism, yet he did so much more. His work on magnetism included antiferromagnetism, superexchange, the Kondo problem and local magnetic moments in metals. Anderson pointed out the importance of disorder through his work on localization, non-crystalline solids and spin glasses. In superconductivity, he is known for the dirty superconductor theorem, showing the gauge-invariance of the BCS theory, his study of flux creep, and for his collaboration with experimentalists to realize the Josephson effect. Anderson's resonating valence bond theory may yet play an important role in high temperature superconductivity. Anderson was also fascinated by broken symmetry, and he laid the theoretical groundwork for what is now known as the Anderson-Higgs mechanism, showing how gauge bosons can acquire mass - an insight that played a foundational role in the Standard Model of particle physics. In his seminal "More is Different" paper, Anderson argued that the collective emergent phenomena that arise in complex interacting systems cannot be deduced from their fundamental parts. Anderson's legacy endures not only through the lasting impact of his scientific work but also through his influence on generations of physicists who continue to explore the rich landscape of collective behavior in nature.
 
  • #246
What's all this mean?
"cond-mat.dis-nn, cond-mat.str-el, cond-mat.supr-con, hep-th."
Pretty sure I figured out this: "physics.hist-ph".
 
  • #247
BillTre said:
What's all this mean?
Take a look at https://arxiv.org/:
  • Physics: History and Philosophy of Physics
  • Condensed Matter: Disordered Systems and Neural Networks
  • Condensed Matter: Strongly Correlated Electrons
  • Condensed Matter: Superconductivity
  • High Energy Physics - Theory
The Anderson biography appears under all those categories on arXiv.
 
  • #248
renormalize said:
Take a look at https://arxiv.org/:
  • Physics: History and Philosophy of Physics
  • Condensed Matter: Disordered Systems and Neural Networks
  • Condensed Matter: Strongly Correlated Electrons
  • Condensed Matter: Superconductivity
  • High Energy Physics - Theory
Edit the post for for understanding unencumbered by unexplained meanings.
 
  • #249
BillTre said:
Edit the post for for understanding unencumbered by unexplained meanings.
Good advice for @sbrothy.
 
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  • #250
renormalize said:
Good advice for @sbrothy.
Og yeah. Sorry. The thought struck me but I kinda assumed you all just new what those abbrevitiona meant. That was naive of me. Another thing to clean up I guess. No problem. I like tinkering around with it.
 

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