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arXiv 0804.4259quant-ph
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通过量子采样加速

Speed-up via Quantum Sampling

Pawel Wocjan, Anura Abeyesinghe

摘要:

马尔可夫链蒙特卡罗方法是组合计数和统计物理中广泛问题的有效近似方案的核心。因此,确定量子计算机是否可以加速基于马尔可夫链的经典混合过程是非常自然和重要的。为此,我们提出了一种新的量子算法,使得制备量子样品成为可能,即,可逆马尔可夫链的平稳分布的相干版本。我们的算法有一个显着更好的运行时间比以前的算法的基础上绝热状态生成。我们还表明,我们的方法提供了一个速度比最近提出的方法获得基态(经典)哈密顿。

英文摘要:

The Markov Chain Monte Carlo method is at the heart of efficient approximation schemes for a wide range of problems in combinatorial enumeration and statistical physics. It is therefore very natural and important to determine whether quantum computers can speed-up classical mixing processes based on Markov chains. To this end, we present a new quantum algorithm, making it possible to prepare a quantum sample, i.e., a coherent version of the stationary distribution of a reversible Markov chain. Our algorithm has a significantly better running time than that of a previous algorithm based on adiabatic state generation. We also show that our methods provide a speed-up over a recently proposed method for obtaining ground states of (classical) Hamiltonians.

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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