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arxiv 1908.11555 v1 pith:RYZFE36X submitted 2019-08-30 cond-mat.stat-mech hep-thmath-phmath.MP

Late-time large-distance asymptotics of the transverse correlation functions of the XX chain in the space-like regime

classification cond-mat.stat-mech hep-thmath-phmath.MP
keywords chainexpressionlarge-distancelate-timeregimetransverseanalysisasymptotic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We derive an explicit expression for the leading term in the late-time, large-distance asymptotic expansion of a transverse dynamical two-point function of the XX chain in the spacelike regime. This expression is valid for all non-zero finite temperatures and for all magnetic fields below the saturation threshold. It is obtained here by means of a straightforward term-by-term analysis of a thermal form factor series, derived in previous work, and demonstrates the usefulness of the latter.

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