We prove the asymptotic large volume expression of diagonal form factors in integrable models by evaluating carefully the diagonal limit of a non-diagonal form factor in which we send the rapidity of the extra particle to infinity.
CITATION STYLE
Bajnok, Z., & Wu, C. (2019). Diagonal Form Factors from Non-diagonal Ones (pp. 141–151). https://doi.org/10.1007/978-3-030-04161-8_10
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