All Questions
3
questions
3
votes
1
answer
92
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Hamiltonians with collective quantum spins and their ground states
This feels like it could be a undergrad/grad-school quantum mechanics course level problem, or potentially something pretty interesting. I'd be happy with either answer, but I don't know which one is ...
- 368
1
vote
0
answers
76
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Non-degeneracy of the ground states of quantum spin models
It is known that the ground state of some quantum spin models is non-degenerate. For example, the ground states of the quantum Ising model and the ferromagnetic Heisenberg model on the subspace of a ...
- 5,697
0
votes
0
answers
34
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Correlation functions of XY quantum chain
I'm trying to understand the calculation of the correlation functions in the XY quantum chain performed by Lieb, Mattis and Schultz in the paper "Two Solvable Models of an antiferromagnetic chain&...
