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arXiv 1409.7192quant-phcond-mat.stat-mech
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量子退火与经典退火:标度理论的启示和3-正则图上自旋玻璃的结果

Quantum versus classical annealing: insights from scaling theory and results for spin glasses on 3-regular graphs

Cheng-Wei Liu, Anatoli Polkovnikov, Anders W. Sandvik

摘要:

我们讨论的伊辛自旋玻璃,其中每个$S=1/2$自旋反铁磁耦合到其他三个自旋(3-正则图)。利用含时横场诱导量子涨落,采用非平衡量子蒙特卡罗模拟研究了量子玻璃化转变的动力学标度。比较的动态指数和其他临界指数与经典(温度驱动)的过渡,我们得出结论,量子退火是效率低于经典模拟退火使系统进入玻璃相。因此,基于量子退火范例的量子计算对于这类问题不如经典的模拟退火。我们还评论了以前的模拟,其中参数随模拟时间而变化,这与这里模拟的真实哈密顿动力学非常不同。

英文摘要:

We discuss an Ising spin glass where each $S=1/2$ spin is coupled antiferromagnetically to three other spins (3-regular graphs). Inducing quantum fluctuations by a time-dependent transverse field, we use out-of-equilibrium quantum Monte Carlo simulations to study dynamic scaling at the quantum glass transition. Comparing the dynamic exponent and other critical exponents with those of the classical (temperature-driven) transition, we conclude that quantum annealing is less efficient than classical simulated annealing in bringing the system into the glass phase. Quantum computing based on the quantum annealing paradigm is therefore inferior to classical simulated annealing for this class of problems. We also comment on previous simulations where a parameter is changed with the simulation time, which is very different from the true Hamiltonian dynamics simulated here.

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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