User Blue

162

votes

5

answers

19k

views

Gauge symmetry is not a symmetry?

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81

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11

answers

12k

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What is spontaneous symmetry breaking in QUANTUM systems?

quantum-mechanics condensed-matter quantum-information research-level symmetry-breaking

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49

votes

6

answers

13k

views

What symmetry causes the Runge-Lenz vector to be conserved?

classical-mechanics orbital-motion noethers-theorem laplace-runge-lenz-vector

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46

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19k

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condensed-matter solid-state-physics superconductivity topological-field-theory majorana-fermions

Sep 29 '17 at 4:05 wonderich 6,895

36

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Do an action and its Euler-Lagrange equations have the same symmetries?

lagrangian-formalism symmetry action

May 17 '18 at 21:59 quantum cowboy 73

36

votes

1

answer

4k

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State of Matrix Product States

quantum-information quantum-entanglement hamiltonian research-level tensor-network

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Equivalence of canonical quantization and path integral quantization

quantum-field-theory lagrangian-formalism operators path-integral quantum-hall-effect

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quantum-field-theory particle-physics

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30

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24

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research-level superconductivity topological-field-theory topological-order topological-insulators

Jan 7 '17 at 22:44 wonderich 6,895

22

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3

answers

5k

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How Non-abelian anyons arise in solid-state systems?

statistical-mechanics solid-state-physics research-level anyons topological-order

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22

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quantum-mechanics quantum-field-theory classical-mechanics symmetry noethers-theorem

Aug 22 '13 at 9:15 Community♦ 1

21

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2k

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quantum-field-theory condensed-matter topological-field-theory

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21

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1k

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quantum-field-theory gauge-theory topological-field-theory topological-order phase-diagram

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19

votes

1

answer

2k

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Why is there no dynamics in 3D general relativity?

general-relativity topological-field-theory

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17

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3

answers

1k

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When do phase space functions' Poisson brackets inherit the Lie algebra structure of a symmetry?

symmetry hamiltonian-formalism lie-algebra poisson-brackets

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17

votes

1

answer

2k

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Spacetime Torsion, the Spin tensor, and intrinsic spin in Einstein-Cartan theory

general-relativity gravity differential-geometry quantum-spin

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14

votes

2

answers

3k

views

Understanding Elitzur's theorem from Polyakov's simple argument?

condensed-matter gauge-theory symmetry-breaking lattice-model gauge-symmetry

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14

votes

2

answers

6k

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Why is the stress-energy tensor symmetric?

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1k

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What is topological degeneracy in condensed matter physics?

condensed-matter topology topological-order

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13

votes

3

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What is an “incompressible” quantum liquid?

condensed-matter

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2k

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Some conceptual questions on the renormalization group

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A question about Haldane's conjecture

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9

votes

1

answer

541

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Relation between p+ip wave Superconductor and Moore-Read State

wavefunction superconductivity topological-field-theory quantum-hall-effect

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votes

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answer

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Mean-field theory and spatial correlations in statistical physics

statistical-mechanics correlation-functions ising-model mean-field-theory

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577

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What states are satisfying an entropic area law and why do they satisfy it? More specificly why do matrix product states satisfy it?

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general-relativity differential-geometry

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5

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1

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Measurement of topological spin

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Lapse function definition

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Apr 23 at 19:51 gamebm 720

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Gauge symmetry is not a symmetry?

What is spontaneous symmetry breaking in QUANTUM systems?

What symmetry causes the Runge-Lenz vector to be conserved?

What is a $p_x + i p_y$ superconductor? Relation to topological superconductors

Do an action and its Euler-Lagrange equations have the same symmetries?

State of Matrix Product States

Equivalence of canonical quantization and path integral quantization

Would a spin-2 particle necessarily have to be a graviton?

Basic questions in Majorana fermions

Do topological superconductors exhibit symmetry-enriched topological order?

How Non-abelian anyons arise in solid-state systems?

Why does the classical Noether charge become the quantum symmetry generator?

How does Haldane conjecture follow from the topological $\Theta$ term

Phase Structure of (Quantum) Gauge Theory

Why is there no dynamics in 3D general relativity?

When do phase space functions' Poisson brackets inherit the Lie algebra structure of a symmetry?

Spacetime Torsion, the Spin tensor, and intrinsic spin in Einstein-Cartan theory

Understanding Elitzur's theorem from Polyakov's simple argument?

Why is the stress-energy tensor symmetric?

What is topological degeneracy in condensed matter physics?

What is an “incompressible” quantum liquid?

Some conceptual questions on the renormalization group

A question about Haldane's conjecture

Does Kaluza-Klein Theory Require an Additional Scalar Field?

Relation between p+ip wave Superconductor and Moore-Read State

Mean-field theory and spatial correlations in statistical physics

What states are satisfying an entropic area law and why do they satisfy it? More specificly why do matrix product states satisfy it?

Is a local Lorentz frame a coordinate chart on a spacetime manifold?

Measurement of topological spin

Lapse function definition