pet_scan

The Basics of Positron Emission Tomography (PET)

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People often ask about the practical applications of fundamental…
qminterpret

Tools to Enrich our Quantum Mechanics Interpretations Discourse

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Introduction Many times, we encounter ourselves…
spacetime6

Struggles with the Continuum - Part 6

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  Last time I sketched how physicists use quantum…
islingmodel

High Temperature Low Temperature Duality for the Ising Model on an Infinite Regular Tree

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Today I felt like sharing a computation that I thought was interesting.…
secondaryforces

Secondary Forces Explored

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Many are familiar with the "fundamental forces" of nature: gravity,…
spacetime5

Struggles with the Continuum - Part 5

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    Quantum field theory is the best method…
darkmatter

Knut Lundmark and the Prehistory of Dark Matter

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Look in your standard cosmology textbook (in my case, the closest…
spacetime4

Struggles with the Continuum - Part 4

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  In this series we're looking at mathematical problems…
theneedforinfinity

The Need of Infinity in Physics

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It is beyond doubt that the notion of infinity lies somewhere…
complexscience

The Complexity of Modern Science

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Science today is incredibly complex. Anyone who ever did scientific…
rainbows

Rainbows are not Vampires

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For several years, I have been contemplating this beautiful…
earthgravity

All about Earth's Gravity

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Earth's gravitational field at the surface is approximately 9.8…
speedoflight1

The Speed of Light and Galilean Relativity

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Introduction In this article I will discuss some experiments…
buoyancy

Understanding Buoyancy: The Limits of Archimedes

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It’s a principle as old as science itself, and remarkably,…
studymath

How to Self-Study Basic High School Mathematics

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  How to self-study basic high school mathematics We…
studymath1

How to Study Mathematics

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  How to self-study mathematics? People self-study…
seeelectron

See an Electron Lately?

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This is not about seeing an electron, but rather, the notion…
peterblockuniverse

The Block Universe - Refuting a Common Argument

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The "block universe" interpretation of SR has come up repeatedly…
Retrocausality

Understanding Retrocausality

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In an Insights series “Blockworld and its Foundational Implications,”…
blockuniverse5

Blockworld and its Foundational Implications Part 5: Delayed Choice and No Counterfactual Definiteness

  In parts 1 and 2 of this 5-part Insights series,…
blockuniverse4

Blockworld and its Foundational Implications Part 4: General Relativity and Closed Timelike Curves

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  In parts 1 and 2 of this 5-part Insights series,…
blockuniverse3

Blockworld and its Foundational Implications Part 3: General Relativity and the Big Bang

  In parts 1 and 2 of this 5-part Insights series,…
blockuniverse2

Blockworld and Its Foundational Implications Part 2: The Relativity of Simultaneity and Blockworld

  In part 1 of this 5-part Insights series, I introduced…
blockuniverse1

Blockworld and Its Foundational Implications Part 1: Time Dilation and Length Contraction

  This is the first in a 5-part series of Insights…
prequantum4

Examples of Prequantum Field Theories IV: Wess-Zumino-Witten-type Theories

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    At the end of this page, we will have…
prequantum3

Examples of Prequantum Field Theories III: Chern-Simons-type Theories

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    After having constructed gauge fields…
guagetheory

Examples of Prequantum Field Theories II: Higher Gauge Fields

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      After having recalled ordinary…
prequantumft

Examples of Prequantum Field Theories I: Gauge Fields

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    After having motivated the need for prequantum…
animationwalk

Fun with Self-Avoiding Walks

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This post is about some simulations I did of self-avoiding…
prequantumgeometry5

Higher Prequantum Geometry V: The Local Observables - Lie Theoretically

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  This article discusses how from the previous considerations…
prequantumgeometry4

Higher Prequantum Geometry IV: The Covariant Phase Space - Transgressively

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    The Euler-Lagrange ##p##-gerbes discussed…
prequantumgeometry3

Higher Prequantum Geometry III: The Global Action Functional - Cohomologically

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    The previous article ended with the…
blackbody

A Poor Man's CMB Primer. Part 3: Bumps on a Blackbody

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  Astronomers Arno Penzias and Robert Wilson discovered…