Form factors in finite volume II: Disconnected terms and finite temperature correlators
Megjelenés dátuma: 2008
MTMT: 1114058
WoS ID: 000251405900005
Scopus ID: 35748951903
Absztrakt:
Continuing the investigation started in a previous work, we consider
form factors of integrable quantum field theories in finite volume,
extending our investigation to matrix elements with disconnected
pieces. Numerical verification of our results is provided by truncated
conformal space approach. Such matrix elements are important in
computing finite temperature correlation functions, and we give a new
method for generating a low temperature expansion, which we test for
the one-point function up to third order. (c) 2007 Elsevier B.V. All
rights reserved.