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arXiv quant-ph/0702252quant-phcond-mat.dis-nn
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量子退火与实时薛定谔动力学的收敛性

Convergence of Quantum Annealing with Real-Time Schrodinger Dynamics

Satoshi Morita, Hidetoshi Nishimori

摘要:

对于一般形式的伊辛模型所表示的最优化问题,导出了量子退火的收敛条件。量子涨落被引入作为横向场和/或横向铁磁相互作用,时间演化遵循实时薛定谔方程。它表明,该系统保持任意接近的瞬时基态,最终达到目标的最佳状态,如果量子涨落的强度下降足够缓慢,特别是成反比的渐近区域中的时间的权力。这与量子退火、量子蒙特卡罗和格林函数蒙特卡罗模拟的其他实现是相同的条件,尽管在动力学类型上有本质的区别。分析的方法是绝热定理的应用结合估计的下限的能隙的基础上最近提出的想法Somma等。等人,用于使用经典量子对应来分析经典模拟退火。

英文摘要:

Convergence conditions for quantum annealing are derived for optimization problems represented by the Ising model of a general form. Quantum fluctuations are introduced as a transverse field and/or transverse ferromagnetic interactions, and the time evolution follows the real-time Schrodinger equation. It is shown that the system stays arbitrarily close to the instantaneous ground state, finally reaching the target optimal state, if the strength of quantum fluctuations decreases sufficiently slowly, in particular inversely proportionally to the power of time in the asymptotic region. This is the same condition as the other implementations of quantum annealing, quantum Monte Carlo and Green's function Monte Carlo simulations, in spite of the essential difference in the type of dynamics. The method of analysis is an application of the adiabatic theorem in conjunction with an estimate of a lower bound of the energy gap based on the recently proposed idea of Somma et. al. for the analysis of classical simulated annealing using a classical-quantum correspondence.

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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