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arXiv quant-ph/0702214quant-phcond-mat.dis-nncond-mat.stat-mech
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横向铁磁相互作用下随机场伊辛模型的量子退火

Quantum annealing of the random-field Ising model by transverse ferromagnetic interactions

Sei Suzuki, Hidetoshi Nishimori, Masuo Suzuki

摘要:

我们在随机场伊辛模型的量子退火过程中引入了横向铁磁相互作用,以加速向目标基态的收敛。当随机场伊辛模型的真实基态具有强铁磁特性时,传统的只使用横向场项的方法收敛缓慢。在这种情况下,横向铁磁相互作用可以显着提高性能。这一结论是通过对瞬时定态能量本征值的分析以及对量子系统采用的Bethe型平均场退火的快速算法得出的。本研究强调了灵活选择量子涨落类型以实现量子退火中最佳性能的重要性。这种灵活性的存在是量子退火相对于模拟退火的一个突出优势。

英文摘要:

We introduce transverse ferromagnetic interactions, in addition to a simple transverse field, to quantum annealing of the random-field Ising model to accelerate convergence toward the target ground state. The conventional approach using only the transverse-field term is known to be plagued by slow convergence when the true ground state has strong ferromagnetic characteristics for the random-field Ising model. The transverse ferromagnetic interactions are shown to improve the performance significantly in such cases. This conclusion is drawn from the analyses of the energy eigenvalues of instantaneous stationary states as well as by the very fast algorithm of Bethe-type mean-field annealing adopted to quantum systems. The present study highlights the importance of a flexible choice of the type of quantum fluctuations to achieve the best possible performance in quantum annealing. The existence of such flexibility is an outstanding advantage of quantum annealing over simulated annealing.

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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