Exact Large-Scale Fluctuations of the Phase Field in the Sine-Gordon Model.
Exact Large-Scale Fluctuations of the Phase Field in the Sine-Gordon Model.
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正弦戈登模型中相场的精确大规模波动。
DOI:
10.1103/physrevlett.131.263401
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发表时间:
2023
影响因子:
8.6
通讯作者:
Del Vecchio GDV
中科院分区:
文献类型:
--
作者:
Del Vecchio GDV
We present the first exact theory and analytical formulas for the large-scale phase fluctuations in the sine-Gordon model, valid in all regimes of the field theory, for arbitrary temperatures and interaction strengths. Our result is based on the ballistic fluctuation theory combined with generalized hydrodynamics, and can be seen as an exact “dressing” of the phenomenological soliton-gas picture first introduced by Sachdev and Young [Phys. Rev. Lett. 78, 2220 (1997)PRLTAO0031-900710.1103/PhysRevLett.78.2220], to the modes of generalized hydrodynamics. The resulting physics of phase fluctuations in the sine-Gordon model is qualitatively different, as the stable quasiparticles of integrability give coherent ballistic propagation instead of diffusive spreading. We provide extensive numerical checks of our analytical predictions within the classical regime of the field theory by using Monte Carlo methods. We discuss how our results are of ready applicability to experiments on tunnel-coupled quasicondensates.
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DOI:
10.1088/1751-8121/ac53c3
发表时间:
2021-10
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
作者:
Rebekka Koch;J. Caux;Alvise Bastianello
通讯作者:
Rebekka Koch;J. Caux;Alvise Bastianello
影响因子:
5.5
作者:
B. Nagy;Gábor Takács;M´arton Kormos
通讯作者:
M´arton Kormos
影响因子:
2.4
作者:
M. Kormos;G. Zaránd
通讯作者:
G. Zaránd
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
Y. Castin;R. Dum;E. Mandonnet;A. Minguzzi;I. Carusotto
通讯作者:
I. Carusotto
影响因子:
3.6
作者:
Giuseppe Del Vecchio Del Vecchio;B. Doyon;P. Ruggiero
通讯作者:
P. Ruggiero