A gaudin-like determinant for overlaps of Néel and XXZ Bethe states
| Authors | |
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| Publication date | 2014 |
| Journal | Journal of Physics. A, Mathematical and Theoretical |
| Volume | Issue number | 47 | 14 |
| Pages (from-to) | 145003 |
| Number of pages | 10 |
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| Abstract | We derive a determinant expression for overlaps of Bethe states of the XXZ spin chain with the Néel state, the ground state of the system in the antiferromagnetic Ising limit. Our formula, of determinant form, is valid for generic system size. Interestingly, it is remarkably similar to the well-known Gaudin formula for the norm of Bethe states, and to another recently-derived overlap formula appearing in the Lieb-Liniger model. |
| Document type | Article |
| Language | English |
| Published at | https://doi.org/10.1088/1751-8113/47/14/145003 |
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