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- W2015328777 abstract "In this paper we continue the investigation of the structural phase transition in a quantum anharmonic crystal. We calculate the influence of breaking the symmetry of the interaction potential on the behaviour of fluctuations and their critical exponents. More precisely, it is shown that when the low-momentum asymptotics of the phonon spectrum (i.e. the Fourier transform of the interaction matrix) have a quartic asymptotic in one direction, the critical exponents for the momentum and position fluctuations increase on the critical line. The quantum nature of the fluctuations in T = 0 is, however, preserved." @default.
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- W2015328777 date "1997-09-07" @default.
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- W2015328777 title "Fluctuations in an asymmetric anharmonic crystal" @default.
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- W2015328777 doi "https://doi.org/10.1088/0305-4470/30/17/007" @default.
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