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I will try to formulate my request later, if I get help at other forums. Now let me ask some more questions: 1) Do you observe that pseudoscientists usually attack the GTR, but not quntum mechanics? 2) Is there a phychological effect, that people who understand GTR don't like QM (like...

I saw this phrase on some science forums. Wikipedia says that the Alcubierre drive, which implies faster-than-light travel, is based on the Einstein field equations.

I have heard a phrase, that the general theory of relativity supports nonlocality. This phrase is strange for me, because I always thought, that Einstein was an opponent of the quantum mechanics because of its nonlocality ("spooky action at distance"). Can you help me understand this phrase?

I have my own understanding of this: the authors of these experiments (with gamers and with quasars) didn't really want to "close one more loophole" in the BT, but they wanted to show, that they don't find insane the idea that everything correlates with everything, and these correlations affect...

Wikipedia says that superconductivity is a phenomenon which can only be explained by quantum mechanics. Maybe there is a close relation between the connection of superconductor parts and quantum entanglement? If yes, a question arises: what is the speed of electric current flowing through the...

There is a video, where the author shows the interference of laser beam on a strand of human’s hair: I bought a laser pointer and reproduced this experiment. Indeed, when a single hair is placed on the way of the laser beam, I see the “scattering” picture (a series of points with intervals of...

Sorry, I still need to clarify: these were the standard physical experiments with photons and polarizers, or electrons and Stern–Gerlach apparatus? CHSH experiment, as far as I understand, is the analogue of the Bell test. For me it is maybe easier to understand the CHSH variant...

https://www.wired.com/story/this-random-video-game-powers-quantum-entanglement-experiments/ I don't understand the principle of this experiment. The gamers produced random numbers, and what was done with these numbers then? Was the value like <S> in CHSH inequalities computed, and was it...

In the sources I have read, it is usually mentioned that currently the level of education is still being increased, and this trend overcompensated the genetic trend (see Flynn effect). But in long-term the genetic trend will dominate.

Dysgenics is the negative selection, decrease in prevalence of good genes with populations. Wikipedia says that dysgenics is not real: https://en.wikipedia.org/wiki/Dysgenics At the same time, I know some articles which state vice versa. For example, a paper in Biological sciences...

Several my threads were closed, though I didn't get a warning. I am not an old member of this forum, and it is unclear for me, what does closing a thread mean, how often such closings occur, and do they increase the risk of a final ban of their OP. Please help me with this. Those who remember my...

It's a pity that my question is not answered; I'd like to add that Arthur Shopenhauer wrote that smart people have limited number of friends and this makes their life more difficult, and I also think that people join sects because sects are very efficient way of getting friends.

I don't understand your reply. You are talking about the Brazil study which I couldn't find, or the British study I cited? The latter seems to be a good work, it uses correct correlational analysis. I can post here some fragments of this study. And what means BS?

I have heard, that a study was performed, maybe in Brazil, and it showed that a correlation was found – more educated people have less friends. I was unable to google this work. Maybe somebody here knows it? I found only the following...

https://backreaction.blogspot.com/2022/02/has-quantum-mechanics-proved-that.html It is unclear for me, why from these experiments the tabloids made the conclusion that "the reality does not exist"? Does the essence of this experiment lie in the fact that it confirmed the Wigner's friend...

I try to activate my mind as strongly as I can, sorry that I still don’t fully understand your answers. Two more questions: 1) With a big number of whales, the negative feedback works, but with a small number of whales, the feedback becomes positive? 2) Can we skip talking about krill? Maybe...

It is difficult for me to analyze your answer at once, please tell me whether the following is correct: The higher the CO2 concentration (in the ocean) -> the more acidic the ocean -> the worse life for krill -> the less iron in the ocean -> the worse life for phytoplankton -> the less...

You want to say that the idea I explained about the steam is fake? This means, that the heating of the ocean is compensated by the ocean cooling due to the steam release, and the greenhouse effect of the steam is relatevely small? So this idea about the greenhouse effect of steam is invented...

Ok, and can you write some more information, under what conditions the negative feedback is replaced by the positive one? Do you mean by the negative feedback the change of concentration of H2O in atmosphere? I understand that if there was only a positive feedback, the planet would either freeze...

1) I want to get more specific information about the positive feedback and the idea, that if the ocean is heating, it will release the steam and this will lead to further heating. What models/calculations for this have been made? 2) In this article in PNAS, it is stated that in case of...

I'm sorry, but can't anyone on this forum answer my basic questions (about the positive feedback and the probability of the scenario in article cited above)?

This article is not fully clear for me, since the CO2 concentrations in in are described in other units than ppm. And again, one more question. In Jurassic era, the concentraion of CO2 was 900 ppm. Can such concentration be dangerous for a human?

It is known, that due to global warming, the average temperature on Earth over the past 100 years has increased by 1.2 degrees. At the same time, I heard that earlier the temperature of the Earth was 7 degrees higher than the current one. I do not deny the danger of global warming, because I...

One more question: how many members of this forum talk not only about physics but also about biology and ethology? And how many of them have read the books of Richard Dawkins (The selfish gene, The Blind Watchmaker, The Greatest Show on Earth, etc)?

If, for example, a person works in the field of physics, what is more useful for him - to spend all his time on studying mainly such sciences as physics and mathematics (related to his profession), or also to study, for example, biology, ethology, history, subsections like game theory? I mean...

This concept explains the Matthew effect, but not the irrational love of females to very long tails. If only this factor was present, in a population of peacocks with average tails both long tails and short tails trends would be resisted by the sexual selection. But we see that in this situation...

Sorry. Here they are: ##\psi _{l}=\begin{pmatrix}1\\0\end{pmatrix}## ##\psi _{h}=\begin{pmatrix}0\\1\end{pmatrix}## ##\psi _{sb}=\begin{pmatrix}0\\i\end{pmatrix}## $$B=\frac{1}{\sqrt{2}}*\begin{pmatrix}1 & i\\i & 1\end{pmatrix}$$ $$ \psi_{s}=B*\psi_{l}= \frac{1}{\sqrt{2}}*\begin{pmatrix} 1...

I have read the article of Elitzur, and one moment should be clarified. The authors describe the procedure for improving the efficiency of the experiment (to get a better percentage of good unexplided bombs): But if the first mirror is almost transparent, this means that most of the photons...

I am a programmer. How the product should be denoted? Ψl is the wavefunction of the electron moving at the lower path, Ψh correspondingly the higher path. When the electron passes the first beam splitter, Ψl is multiplied by B and the superposition Ψs appears. When this superposition passes the...

I have written the formulas, please look and say whether they are correct: Here Ψl is the wavefunction of the electron moving at the lower path, Ψh correspondingly the higher path, Ψs is the superposition after the first beam splitter, Ψf the superposition after the second beam splitter, Ψsb...

By the way: https://arxiv.org/pdf/2208.09964.pdf If you don't like philosophy, maybe you think the only good interpretation of QM is "shut up and calculate"? But here the inventors of quantum computers disagree with this.

Some people say that I am good at explaining complex things clearly. Therefore, I am trying to study and understand quantum mechanics and physics in general, in order to further contribute to their popularization; the purpose of this popularization is to explain to ordinary people the...

You want to say that you won't approve if I post a link to one of the forums berkeman sent to me in PM?

My thread "Space-time quantization and its philosophical aspect" was closed. Can you suggest other science forum where I can create such threads? I have many ideas of this kind, and I want to initiate conversations about them. And what forums support the discussion of new ideas and hypotheses in...

Sorry, of course I meant detectors C and D. From this article it is unclear for me, what means the ψ in this formula (which is multiplied by the P*B*P matrix). Mayve it is a vector of electric intensity of a photon?

Sorry, is there really no one on this forum who can answer my questions? Let me rephrase them: 1) Do I understand correctly, that if there is no first mirror and bomb, and the photon always follows the lower path, then detector C is triggered with a probability of 50%, detector B with a...

As I understand it, if there is an ordinary mirror instead of the first translucent mirror, and the photon always goes along the upper path, after the second mirror it is detected with a 50% probability at C and with a 50% probability it is detected at D. If the photon goes only along the lower...

Modern physics describes matter by real numbers. This means that an absolutely accurate description of any particle requires an infinite amount of information. Intuitively, it seems that this should not be so, and the model of the Conway's Game of Life looks more close to reality. In this...

I don't understand your reply, suppose this is a kind of trolling. However my question is simple. Suppose there are 100 males and 100 females in a population of peacocks. 80 males have long tails, 20 males have short ones; 80 females prefer long tails, 20 females prefer short. As a result...

Perhaps, in order to understand (or refute) the handicap principle, it is useful to understand the concept of Fischer's runaway (I guess it is not denied by anyone now). https://en.wikipedia.org/wiki/Fisherian_runaway I've read this article, as well as Dawkins’s explaining of the concept, but...

I have got 3 warnings. I tried to read the rules and at first didn't find the information about warnings - how many warnings do lead to bans. Where is this information written? Then, last lime I got two warnings with this thread...

Maybe you mean that a polarizer and a polarizing beam splitter (PBS) is not the same?

I heard that a rope can serve as an analogy for light, then a gap will be an analogy for a polarizer. Linear or circular waves can be sent along the rope; if you pass a rope through a slot, then the circular oscillation will turn into a linear one, and if you put two perpendicular slots, then...

I hope other members will be interested in this topic, and if this discussion continues, I will read and cite the article of Grafen too.

https://en.wikipedia.org/wiki/Handicap_principle The handicap principle is a controversial hypothesis, possible confirmed by Alan Grafen. I would like to understand his reasoning. A handicap is a harmful thing, like a peacock's tail, that attracts females precisely because it is harmful...

In this thread, I set out an analogy illustrating what quantum entanglement is; further in my post there is a description of the experiment with polarizers and waveplates, corresponding to this model (CHSH inequalities). To understand it, you need to understand what polarization is. I have read...

You mean - in these worlds the bomb didn't explode but the observers know that it exploded in other worlds?

https://en.wikipedia.org/wiki/Elitzur–Vaidman_bomb_tester In the Elitztur-Weidman experiment there are bombs that are triggered by a single photon hitting their detector, and with some probability you can find out that the bomb is working, despite the fact that it did not explode. I'm trying...

It is written that the quintic function cannot be solved in radicals. But what if we invent new types of radicals?

So, my question is, are there any special functions invented for solving the 5th degree equations? This is the questions of computational efficiency: what way of computing the solution for these equations is more efficient - a formula consisting of some special functions (each of them being...