Showing papers by "Zoltan Bajnok published in 2023"
18 Apr 2023
TL;DR: In this article , a new method to calculate finite size corrections for form factors in two-dimensional integrable quantum field theories was developed, extracting these corrections from the excited state expectation value of bilocal operators in the limit when the operators are far apart.
Abstract: We develop a new method to calculate finite size corrections for form factors in two-dimensional integrable quantum field theories. We extract these corrections from the excited state expectation value of bilocal operators in the limit when the operators are far apart. We elaborate the finite size effects explicitly up to the 3rd L\"uscher order and conjecture the structure of the general form. We also fully recover the explicitly known massive fermion finite volume form factors.