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EXCITATION SPECTRUM AT THE YANG–LEE EDGE SINGULARITY OF THE 2D ISING MODEL

JOHN F. MCCABE

412 Morris Ave., # 34, Summit, NJ 07901, USA

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and

TOMASZ WYDRO

Université Paul Verlaine — Metz, Laboratoire de Physique Moléculaire et de Collisions, 1 bvd Arago, 57078 Metz, France

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https://doi.org/10.1142/S021797920603336XCited by:4 (Source: Crossref)

Abstract

This paper studies the Yang–Lee edge singularity of 2-dimensional (2D) Ising model through a quantum spin chain. In particular, finite-size scaling measurements on the quantum spin chain are used to determine the low-lying excitation spectrum and central charge at the Yang–Lee edge singularity. The measured values are consistent with predictions for the (A₄, A₁) minimal conformal field theory.

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