network profile
| bio | website | |
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| age | ||
| visits | member for | 1 year, 6 months |
| seen | Nov 30 '11 at 15:28 | |
| stats | profile views | 4 |
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Nov 22 |
revised |
What is a free fermion model? added 22 characters in body |
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Nov 16 |
awarded | Editor |
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Nov 16 |
revised |
What is a free fermion model? added 125 characters in body |
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Nov 10 |
comment |
What is a free fermion model? @LubošMotl Also, if you were to expand your comment as an answer, I'd be happy to accept it. |
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Nov 9 |
comment |
What is a free fermion model? @LubošMotl Thank you. So the example Hamiltonian is a free fermion model since in fermions, it only contains $\sum_l a_l^\dagger a_{l+1}$ and $\sum_l (-1)^l a_l^\dagger a_{l+1}$ type terms. By this reasoning, even a spin chain $H_2 = - \sum_l J_l (\sigma_l^x \sigma_{l+1}^x + \sigma_l^y \sigma_{l+1}^y)$ where $J_l$ is different for each $l$ is a free fermion model. Is that right? |
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Nov 8 |
comment |
What is a free fermion model? @Qmechanic Thank you for replying. As far I can see, Icv's answer just mentions free fermion models but doesn't say what they actually are, which is what I'm asking. |
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Nov 8 |
awarded | Student |
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Nov 8 |
asked | What is a free fermion model? |
