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arXiv 1209.2294cond-mat.stat-mech
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无限程量子伊辛模型中的双共振

Double resonance in the infinite-range quantum Ising model

Sung-Guk Han, Jaegon Um, Beom Jun Kim

摘要:

研究了零温下无限程动力学伊辛模型的量子共振行为。在不同的横向磁场强度$g$下,在$z$方向上存在外磁场时,对含时薛定谔方程进行数值积分。结果表明,当能隙与外部驱动频率匹配时,在两个不同的$g$值处出现两个共振峰,一个低于量子相变,另一个高于量子相变。根据在经典相变系统中已经得到的类似的观察结果,我们认为双共振峰应该是量子多体系统和经典多体系统中连续相变的一个普遍特征。

英文摘要:

We study quantum resonance behavior of the infinite-range kinetic Ising model at zero temperature. Numerical integration of the time-dependent Schrödinger equation in the presence of an external magnetic field in the $z$ direction is performed at various transverse field strengths $g$. It is revealed that two resonance peaks occur when the energy gap matches the external driving frequency at two distinct values of $g$, one below and the other above the quantum phase transition. From the similar observations already made in classical systems with phase transitions, we propose that the double resonance peaks should be a generic feature of continuous transitions, for both quantum and classical many-body systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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