User Zhengyan Shi

16 votes

1 answer

2k views

How fast does a wavefunction vanish at infinity?

asked Feb 5, 2017 at 1:22

14 votes

2 answers

4k views

Intuitive Explanation of Tippe Top Effect?

newtonian-mechanics angular-momentum rotational-dynamics everyday-life rigid-body-dynamics

asked Oct 18, 2015 at 21:59

13 votes

3 answers

4k views

What really is a Dirac delta function?

mathematical-physics dirac-delta-distributions

asked Oct 3, 2015 at 22:20

12 votes

3 answers

766 views

No-Cloning and Uncertainty: Connections or Misconception

quantum-mechanics quantum-information heisenberg-uncertainty-principle non-linear-systems

asked Jul 8, 2016 at 12:58

9 votes

1 answer

238 views

Does sluggish decoherence in deep space have any noticeable effects?

quantum-mechanics space decoherence

asked Sep 9, 2016 at 17:20

7 votes

3 answers

921 views

Is there a work-energy theorem in quantum mechanics?

quantum-mechanics energy work

asked Sep 5, 2016 at 3:35

5 votes

2 answers

2k views

Action max, min, or saddle?

lagrangian-formalism variational-principle action

asked Sep 27, 2015 at 4:41

5 votes

1 answer

261 views

Ambiguity of Coarse Graining in Classical Stat Mech?

statistical-mechanics phase-space partition-function

asked Oct 27, 2017 at 22:48

4 votes

0 answers

53 views

Chaos and Ergodicity in Hamiltonian Field Theory?

field-theory chaos-theory ergodicity

asked May 12, 2020 at 6:26

3 votes

0 answers

327 views

Question on the Derivation of Lorentz Invariance of Electric Charge

electromagnetism special-relativity charge lorentz-symmetry

asked Jun 28, 2016 at 7:31

3 votes

1 answer

187 views

Generalization of Itzykson-Zuber Formula to Path Integrals?

mathematical-physics path-integral matrix-model

asked Jun 25, 2017 at 0:17

3 votes

1 answer

157 views

The Validity of a Heuristic Explanation of Black Hole Complementarity?

optics gravity black-holes measurements

asked Jul 24, 2016 at 15:30

2 votes

0 answers

268 views

Connection between BQP and Feynman Path Integral

quantum-information path-integral quantum-computer

asked Jul 30, 2016 at 15:26

2 votes

0 answers

2k views

Canonical Momentum Conjugate vs. Momentum

classical-mechanics lagrangian-formalism differential-geometry hamiltonian-formalism

asked Oct 7, 2015 at 3:14

2 votes

1 answer

1k views

Black Hole: mass density or energy density? [closed]

general-relativity black-holes mass-energy

asked Jul 13, 2016 at 10:10

2 votes

2 answers

1k views

Pauli Matrices & 2D Rotation Operators?

homework-and-exercises angular-momentum rotation linear-algebra eigenvalue

asked Nov 28, 2015 at 17:37

2 votes

0 answers

32 views

How fast can the spectral gap of a translation-invariant Hamiltonian close?

quantum-information mathematical-physics lattice-model

asked Jul 3 at 18:10

1 vote

0 answers

28 views

Lower bound on the spectral gap in finite size critical systems with locality

quantum-information entropy quantum-entanglement critical-phenomena

asked Mar 8 at 18:06

1 vote

1 answer

241 views

Does curved spacetime arise from inhomogeneity of gravitational field?

gravity spacetime inertial-frames observers equivalence-principle

asked May 4, 2016 at 4:19

1 vote

1 answer

368 views

A Confusion About Energy-Time Uncertainty Relations

quantum-mechanics energy time heisenberg-uncertainty-principle

asked Oct 15, 2015 at 14:42

1 vote

2 answers

3k views

Why not use the magnetic scalar potential?

electromagnetism potential

asked Sep 23, 2015 at 20:07

0 votes

1 answer

115 views

Micius Satellite Mission and Space Quantum Communication [closed]

quantum-information

asked Aug 18, 2016 at 2:01

0 votes

0 answers

111 views

Indistinguishability of Mixed and Pure States in Complex Systems

quantum-mechanics quantum-information measurements quantum-states

asked Aug 23, 2016 at 14:47

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23 Questions

How fast does a wavefunction vanish at infinity?

Intuitive Explanation of Tippe Top Effect?

What really is a Dirac delta function?

No-Cloning and Uncertainty: Connections or Misconception

Does sluggish decoherence in deep space have any noticeable effects?

Is there a work-energy theorem in quantum mechanics?

Action max, min, or saddle?

Ambiguity of Coarse Graining in Classical Stat Mech?

Chaos and Ergodicity in Hamiltonian Field Theory?

Question on the Derivation of Lorentz Invariance of Electric Charge

Generalization of Itzykson-Zuber Formula to Path Integrals?

The Validity of a Heuristic Explanation of Black Hole Complementarity?

Connection between BQP and Feynman Path Integral

Canonical Momentum Conjugate vs. Momentum

Black Hole: mass density or energy density? [closed]

Pauli Matrices & 2D Rotation Operators?

How fast can the spectral gap of a translation-invariant Hamiltonian close?

Lower bound on the spectral gap in finite size critical systems with locality

Does curved spacetime arise from inhomogeneity of gravitational field?

A Confusion About Energy-Time Uncertainty Relations

Why not use the magnetic scalar potential?

Micius Satellite Mission and Space Quantum Communication [closed]

Indistinguishability of Mixed and Pure States in Complex Systems