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Full counting statistics in the spin-1/2 Heisenberg XXZ chain
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Full counting statistics in the spin-1/2 Heisenberg XXZ chain
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The spin-1/2 Heisenberg chain exhibits a quantum critical regime characterized by quasi long-range magnetic order at zero temperature. We quantify the strength of quantum fluctuations in the ground state by determining the probability distributions of the components of the (staggered) subsystem magnetization. Some of these exhibit scaling and the corresponding universal scaling functions can be determined by free fermion methods and by exploiting a relation with the boundary sine-Gordon model.
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Cited by 1 Pith paper
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Full counting statistics in the sine-Gordon model
Full counting statistics for energy, momentum, and topological charge in the sine-Gordon model, computed via TBA, show fractal coupling dependence for topological charge but smooth behavior for energy and momentum.
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