Velocity-dependent Lyapunov exponents in many-body quantum, semiclassical, and classical chaos
Velocity-dependent Lyapunov exponents in many-body quantum, semiclassical, and classical chaos
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多体量子、半经典和经典混沌中速度相关的李雅普诺夫指数
DOI:
10.1103/physrevb.98.144304
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发表时间:
2018
影响因子:
3.7
通讯作者:
Khemani V
中科院分区:
文献类型:
--
作者:
Khemani V
The exponential growth or decay with time of the out-of-time-order commutator (OTOC) is one widely used diagnostic of many-body chaos in spatially extended systems. In studies of many-body classical chaos, it has been noted that one can define a velocity-dependent Lyapunov exponent,, which is the growth or decay rate along rays at that velocity. We examine the behavior offor a variety of many-body systems, both chaotic and integrable. The so-called light cone for the spreading of operators is defined by, with a generally direction-dependent butterfly speed. In spatially local systems,is negative outside the light cone where it takes the formnear, with the exponenttaking on various values over the range of systems we examine. The regime inside the light cone with positive Lyapunov exponents may only exist for classical, semiclassical, or large-systems, but not for “fully quantum” chaotic systems with strong short-range interactions and local Hilbert space dimensions of order one.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
Iztok Pižorn;T. Prosen
通讯作者:
T. Prosen
DOI:
--
发表时间:
1994
期刊:
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子:
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DOI:
--
发表时间:
2006
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
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作者:
C. Monthus;T. Garel
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影响因子:
12.5
作者:
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通讯作者:
Huse, David A.
影响因子:
3.7
作者:
Gopalakrishnan, Sarang;Huse, David A.;Vasseur, Romain
通讯作者:
Vasseur, Romain