Real-time dynamics of matrix quantum mechanics beyond the classical approximation
Real-time dynamics of matrix quantum mechanics beyond the classical approximation
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超越经典近似的矩阵量子力学的实时动力学
DOI:
10.1051/epjconf/201817508006
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发表时间:
2018
影响因子:
--
通讯作者:
Buividovich P
中科院分区:
文献类型:
--
作者:
Buividovich P
We describe a numerical method which allows to go beyond the classical approximation for the real-time dynamics of many-body systems by approximating the many-body Wigner function by the most general Gaussian function with time-dependent mean and dispersion. On a simple example of a classically chaotic system with two degrees of freedom we demonstrate that this Gaussian state approximation is accurate for significantly smaller field strengths and longer times than the classical one. Applying this approximation to matrix quantum mechanics, we demonstrate that the quantum Lyapunov exponents are in general smaller than their classical counterparts, and even seem to vanish below some temperature. This behavior resembles the finite-temperature phase transition which was found for this system in Monte-Carlo simulations, and ensures that the system does not violate the Maldacena-Shenker-Stanford boundλL< 2πT, which inevitably happens for classical dynamics at sufficiently small temperatures.
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影响因子:
4.4
作者:
J. Berges;S. Floerchinger;R. Venugopalan
通讯作者:
J. Berges;S. Floerchinger;R. Venugopalan
影响因子:
5.4
作者:
A. Kurkela;G. Moore
通讯作者:
A. Kurkela;G. Moore
影响因子:
56.9
作者:
J. Schmiedmayer;J. Berges
通讯作者:
J. Berges
DOI:
--
发表时间:
2008
期刊:
Phys.Rev.Lett. 100
影响因子:
--
作者:
Konstantinos N. Anagnostopoulos;Masanori Hanada;Jun Nishimura;Shingo Takeuchi
通讯作者:
Shingo Takeuchi
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
J. Broeckhove;L. Lathouwers;P. Leuven
通讯作者:
P. Leuven