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Universal scaling of work statistics in conformal field theory models

机译:保形场理论模型中工作统计的普遍扩展

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摘要

We systematically study the work statistics for quantum phase transition. For a quantum system approached by an anisotropic conformal field theory near the critical point, the driving protocol is divided into three different regimes for different quench rates, which reflects the competition between the frozen time and the quench timescale. In each regime, we find universal scaling behaviors in work statistics (after renormalization). It is shown that the critical exponents are determined by the space-time dimension d, the dynamical critical exponent z, the correlation-length exponent v, and the power-law protocols. These universal scalings in nonequilibrium processes may be found in quantum phase transition by measuring the Loschmidt echo or the Ramsey interfer-ometry.
机译:我们系统地研究了量子阶段转型的工作统计数据。 对于通过临界点附近的各向异性保形场理论接近的量子系统,驱动协议分为三个不同的淬火速率制度,这反映了冻结时间和淬火时间之间的竞争。 在每个制度中,我们在工作统计信息中找到通用缩放行为(重整化后)。 结果表明,临界指数由时空维度D,动态临界指数Z,相关长度指数V和电力法协议确定。 通过测量Loschmidt回波或Ramsey干扰 - ometry,可以在量子相转变中找到非支配过程中的这些通用缩放。

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  • 来源
    《Physical review.B.Condensed matter and materials physics》 |2021年第14期|144204.1-144204.8|共8页
  • 作者

    Zhaoyu Fei; C. P. Sun;

  • 作者单位

    Graduate School of China Academy of Engineering Physics No. 10 Xibeiwang East Road Haidian District Beijing 100193 China;

    Graduate School of China Academy of Engineering Physics No. 10 Xibeiwang East Road Haidian District Beijing 100193 China and Beijing Computational Science Research Center Beijing 100193 China;

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