Free fermions beyond Jordan and Wigner
The Jordan-Wigner transformation is frequently utilised to rewrite quantum spin chains in terms of fermionic operators. When the resulting Hamiltonian is bilinear in these fermions, i.e. the fermions are free, the exact spectrum follows from the eigenvalues of a matrix whose size grows only linearly...
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| Format: | Article |
| Language: | English |
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SciPost
2024-04-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.16.4.102 |