d_b

Los Angeles, CA, United States

A lapsed physicist.

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What is the geometry in algebraic geometry?

geometry differential-geometry algebraic-geometry asked Oct 26, 2022 at 19:03

math.stackexchange.com

8 votes

What is topological about topological (Dirac or Weyl) semimetals?

condensed-matter topological-order topological-phase weyl-semimetal symmetry-protected asked Aug 12, 2020 at 19:07

physics.stackexchange.com

6 votes

Why can we choose spin-1/2 degrees of freedom to commute?

condensed-matter bosons lattice-model spin-models spin-statistics asked Sep 16, 2021 at 19:32

physics.stackexchange.com

6 votes

Berry curvature of Landau levels

quantum-mechanics condensed-matter topological-phase asked Jan 23, 2014 at 18:49

physics.stackexchange.com

6 votes

What is a theory of gravity?

general-relativity gravity string-theory supergravity asked Nov 9, 2018 at 19:12

physics.stackexchange.com

6 votes

Proving that simple harmonic motion and pendulum motion are periodic

ordinary-differential-equations classical-mechanics periodic-functions asked Jul 28, 2022 at 23:31

math.stackexchange.com

5 votes

How to see that the trivial insulator is trivial?

condensed-matter electronic-band-theory topological-insulators topological-phase insulators asked Oct 13, 2021 at 17:56

physics.stackexchange.com

Top Answers

Why is there a need for the concept of energy if we have the concept of momentum?

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Why does the vacuum even have permeability and permittivity?

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Idea of Covering Group

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Is the magnetic vector potential "real" in classical electromagnetism?

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Why is quantum gravity non-renormalizable?

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Why is the centre of mass of a semicircular wire outside the body?

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Why does charge accumulate at points?

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What is the physical importance of topological quantum field theory?

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Is this four-step recipe for quantization always valid?

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Is the second law of thermodynamics even a law?

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Properties of the dot product

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Is resonance a general property of second-order differential equations?

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When assembling a ball of charge, why do we need less energy to assemble a bigger ball?

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Is it correct to say "My teacher yesterday was in Beijing."?

ell.stackexchange.com

How can (in Dirac's terminology) the product of two "real" linear operators be "not real"?

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Is the spacetime interval a tensor?

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Proof that Vectors Describe Reality Correctly

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How entangled are the $|W\rangle$ and the $|GHZ\rangle$ states?

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How does potential energy increase with no work?

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Why is the ground warm during winter and vice-versa?

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Should it be 1.5K instead of 1.5°C?

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Basics of photoelectric effect

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How can the electric and magnetic fields be non-zero in the absence of sources?

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How is it possible to escape a gravitational body?

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Is a bra-ket always a scalar?

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What did Feynman say about cesium chloride and body-centered cubic structure?

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Is it "beat three men off" or "beat off three men"?

ell.stackexchange.com

Is $V_\text{RMS}$ an unfortunate abuse of operator?

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Is a book fund related to money?

ell.stackexchange.com

How was the Biot-Savart law for magnetic fields derived if the Lorentz force had not been experimentally derived?

physics.stackexchange.com