Effective free-fermionic form factors and the XY spin chain
We introduce effective form factors for one-dimensional lattice fermions with arbitrary phase shifts. We study tau functions defined as series of these form factors. On the one hand we perform the exact summation and present tau functions as Fredholm determinants in the thermodynamic limit. On th...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SciPost
2021-03-01
|
| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.10.3.070 |