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user2820579
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10 votes

Why do we care about the spectrum of the Hamiltonian?

3 votes
Accepted

Adjoint of the time-evolution operator

2 votes

How does an electron move through a metal or a semiconductor?

2 votes

Why can an inner product of an eigenvector also be used as an eigenvector?

1 vote

Perturbing the Harmonic oscillator

1 vote

Effects of the electrostatic field

1 vote

Help understanding proof in simultaneous diagonalization

1 vote

On the Hilbert spaces for $\hat L$ and $\hat S$

0 votes

Degeneracy of 2 Dimensional Harmonic Oscillator

0 votes

Particle density operator in Fetter and Walecka

0 votes

Parity transformation and mirror reflection

0 votes

Do two 1D Rectangular Potential Barriers have Bound States?

0 votes

Checking invariance equations of motion field operators

0 votes

Why does a fermionic Hamiltonian always obey fermionic parity symmetry?

0 votes

Energy quantization

-1 votes

Why are topological insulators interesting?