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Solarflare0
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8 votes
3 answers
2k views

Why is imaginary time evolution non-unitary?

6 votes
1 answer
913 views

When to use a Kronecker sum vs a tensor product of Hamiltonians?

5 votes
1 answer
153 views

Is there a well-defined association between abstract linear operators in Fock space and normal ordered polynomials of fermionic operators?

4 votes
0 answers
267 views

Defining particles by their commutation/anti-commutation relations

3 votes
1 answer
341 views

Form of the interaction representation time evolution operator

3 votes
2 answers
327 views

Does quantum mechanics tell us when the next measurement will occur?

2 votes
1 answer
212 views

Does the Many Worlds Interpretation make any distinction between entangling processes and measurement?

2 votes
1 answer
139 views

Set of unitary operators such that $U|0\rangle = |\psi\rangle$

1 vote
2 answers
215 views

Two distinct uses for the density matrix formalism

1 vote
0 answers
54 views

Relationship between two different notions of changing basis

1 vote
2 answers
107 views

Role of Hermiticity in Quantum Mechanics without exploiting the Spectral Theorem

1 vote
1 answer
490 views

What is the mathematical setting of the Jordan-Wigner transformation?

1 vote
1 answer
723 views

Heisenberg Equation for Raising and Lowering Operators of the Harmonic Oscillator

1 vote
1 answer
148 views

Is there a way to measure the degree of superposition of a quantum state?

0 votes
1 answer
130 views

The Adiabatic Theorem and Symmetries of the Hamiltonian