Physics Articles

Here contains the collection of expert physics articles that deal with physics topics. These span all skill ranges and may include astronomy and cosmology topics. Learn something new today by professionals in the fields you are interested in!

supergravity

Emergence From the Superpoint

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  In the previous article we saw that the generalization…
liealgebra

Homotopy Lie-n Algebras in Supergravity

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  The previous article in this series claimed that…
string theory

It Was 20 Years Ago Today -- the M-theory Conjecture

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    While the world didn't end, after all,…
hupmisconceptions1

Misconception of the Heisenberg Uncertainty Principle

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One of the common misconception about the Heisenberg Uncertainty…
errorbars

Plus/minus What? How to Interpret Error Bars

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People some times find themselves staring at a number with a…
LCDM4

Approximate LCDM Expansion in Simplified Math (Part 4)

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  Part 4: Cosmic Recession Rates An astronomer, accompanied…
LCDM3

The LCDM Cosmological Model in Simplified Math (Part 3)

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  Part 3: Important Cosmological Horizons and Distances A…
lcdmjorrie

Approximate LCDM Expansion in Simplified Math (Part 2)

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  Part 2: Time and Distance In Part 1 we have seen…
neutrino

Neutrino Masses and Speed

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It was hard to miss the 2011 OPERA neutrino speed measurement…
gravity

Understanding the General Relativity View of Gravity on Earth

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Often students have difficulty reconciling the General Relativity…
cosmo

Approximate LCDM Expansion in Simplified Math

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  If we restrict ourselves to a spatially flat LCDM…
physics love

Science for Love or for Money

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When I look over the most highly cited papers and my favorite…
measuringentanglement

Measuring Quantum Entanglement?

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Though any pair of particles, given their history, might happen…
garrett

Garrett Lisi's Superparticle Bet With Frank Wilczek

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There is an interesting story unfolding in particle physics.…
qftintegrals

Some Useful Integrals In Quantum Field Theory

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In my paper on renormalisation I mentioned what most who have…
arrowoftime

Retrocausality: How Fundamental is the Arrow of Time?

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In this Insight, I'll discuss a recent experiment ([1]  [2]…
research work

Initiating Research Work As a Physics Major

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    It has been a while since the last installment…
gas compression

Reversible Vs Irreversible Gas Compression and Expansion Work

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Introduction In learning Thermodynamics, one of the difficult…
perbation theory

Causal Perturbation Theory

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Relativistic quantum field theory is notorious for the occurrence…
cheshirecat

Weak Values Part 2: The Quantum Cheshire Cat Experiment

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In a previous Insight, Weak Values Part 1: "Asking Photons Where…
askingphotons

Weak Values Part 1: Asking Photons Where They Have Been

In a previous Insight on retrocausality, I explained an experiment…
negative temperature

Negative absolute temperatures

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It's a famous result in thermodynamics that you can't reach absolute…
What is Energy

What is Energy?

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What is energy? For some reason, this perfectly legitimate…
LHC

LHC Part 3: Protons as Large as a Barn

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  See also part 1 and part 2 of the series. The…
earth year

Measuring How Many Days Are in a Year

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How many days are there in a year? Ask pretty much anyone and…
redlights

The Greenberger-Horne-Zeilinger Experiment

In two previous Insights, I shared Mermin's explanation of…
mermin

The Quantum Liar Experiment: An Instantiation of the Mermin Device

In 1981, Mermin published a paper[1], "Bringing home the atomic…
classroom

Some Sins in Physics Didactics

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Introduction There are many sins in physics didactics. Usually…

LHC Part 2: Commissioning

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  Last month, I wrote a FAQ about working at the…
supernova

The Fates of Massive Stars

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Introduction Deep in the vastness of space, beyond our solar…
hand_to_hand_combat

Physics in Hand-to-Hand Combat

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Civilizations wax and wane but principles of physics remain steadfast.…