Exact finite volume expectation values of conserved currents
Zoltan Bajnok, Istvan Vona
TL;DR
This paper derives exact formulas for finite volume expectation values of conserved currents in integrable quantum field theories, extending previous results to excited states and including all finite size effects.
Contribution
It introduces a method using analytic continuation to compute excited state expectation values of conserved currents in finite volume, valid for diagonally scattering theories.
Findings
Formulas valid for excited states in finite volume
Inclusion of all finite size corrections
Applicable to diagonally scattering theories
Abstract
The vacuum expectation values of conserved currents play an essential role in the generalized hydrodynamics of integrable quantum field theories. We use analytic continuation to extend these results for the excited state expectation values in a finite volume. Our formulas are valid for diagonally scattering theories and incorporate all finite size corrections.
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