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Finite temperature correlation function for one-dimensional Quantum Ising model: the virial expansion
classification
❄️ cond-mat.stat-mech
cond-mat.str-elmath-phmath.MP
keywords
expansionfunctioncorrelationfinitetemperaturevirialconvenientdensity
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We rewrite the exact expression for the finite temperature two-point correlation function for the magnetization as a partition function of some field theory. This removes singularities and provides a convenient form to develop a virial expansion (the expansion in powers of soliton density).
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