Fluctuations of subsystem entropies at late times
Fluctuations of subsystem entropies at late times
复制标题
子系统熵的后期波动
DOI:
10.1103/physreva.105.022416
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发表时间:
2020
影响因子:
2.9
通讯作者:
Daniel Ranard
中科院分区:
文献类型:
--
作者:
Jordan S. Cotler;Nicholas Hunter;Daniel Ranard
We study the fluctuations of subsystem entropies in closed quantum many-body systems after thermalization. Using a combination of analytics and numerics for both random quantum circuits and Hamiltonian dynamics, we find that the statistics of such entropy fluctuations is drastically different than in the classical setting. For instance, shortly after a system thermalizes, the probability of entropy fluctuations for a subregion are suppressed in the dimension of the Hilbert space of the complementary subregion. This suppression becomes increasingly stringent as a function of time, ultimately depending on the exponential of the Hilbert space dimension, until extremely late times when the amount of suppression saturates. We also use our results to estimate the total number of rare fluctuations at large timescales. We find that the "Boltzmann brain" paradox is largely ameliorated in quantum many-body systems, in contrast with the classical setting.
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DOI:
10.1103/physreve.88.052114
发表时间:
2013
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
P. Reimann;M. Evstigneev
通讯作者:
M. Evstigneev
影响因子:
12.5
作者:
Nahum, Adam;Vijay, Sagar;Haah, Jeongwan
通讯作者:
Haah, Jeongwan
影响因子:
8.6
作者:
Choi, Soonwon;Turner, Christopher J.;Abanin, Dmitry A.
通讯作者:
Abanin, Dmitry A.
影响因子:
16.6
作者:
Reimann P
通讯作者:
Reimann P
影响因子:
56.9
作者:
Lukin, Alexander;Rispoli, Matthew;Greiner, Markus
通讯作者:
Greiner, Markus