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Zhengyan Shi
  • Member for 7 years, 1 month
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11 votes
Accepted

Why can't the off-diagonal terms in density operators of pure states be always removed?

8 votes
Accepted

Form of the geodesic equation

8 votes

Lowering/raising metric indexes

7 votes
Accepted

Will accelerated observer see radiation from the charge that is at rest in observers's frame?

6 votes
Accepted

Explicitly show covariance of Euler Lagrange equations

6 votes

Why doesn't superselection forbid almost every superposition?

6 votes

Change in internal energy is 0 in isothermal process

6 votes

Physical meaning of the Lagrangian function

5 votes

What is the momentum canonically conjugate to spin in QM?

3 votes
Accepted

Is there any Hamiltonian that contains time derivative?

3 votes

How can I adapt classical continuum mechanics equations in order to agree with general relativity?

3 votes

Trouble understanding Landau & Lifshitz writing about Lagrangians and Galilean Relativity

3 votes
Accepted

When to use a whole vector approach vs an energy approach?

3 votes

What is the "practical purpose" of Gaussian surfaces?

2 votes
Accepted

Torque when net external force is zero

2 votes

Physical intuition about the inertia tensor

2 votes

Lagrangian in rotating reference frame

2 votes

Invariance and conservation

2 votes
Accepted

Would it be safe to say that mass is kind of a property of energy?

2 votes
Accepted

Application of CPT invariance : some trivial algebra

2 votes
Accepted

Need some help with tensors

2 votes

How do we know that analytic continuation agrees with UV regulators?

2 votes

How terms disappear in conservation of stress-energy tensor?

2 votes

Are the partial derivatives of Lagrangian in the varied action functional derivatives?

2 votes
Accepted

Confusion with Newton’s third law

1 vote

What happens if we measure the two entangled systems of the Bell test simultaneously?

1 vote

Harmonic oscillator relation with this Hamiltonian

1 vote

Is there a dynamic prelude to the state equation?

1 vote

Magnetic Mirrors

1 vote

Gauss law question with regard to this example