通过设计量子退火与环境的耦合来改进量子退火

IF 5.8 2区物理与天体物理 Q1 OPTICS

EPJ Quantum Technology Pub Date : 2023-10-16 DOI:10.1140/epjqt/s40507-023-00202-0

Mojdeh S. Najafabadi, Daniel Schumayer, Chee-Kong Lee, Dieter Jaksch, David A. W. Hutchinson

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引用次数: 0

摘要

大量的优化问题可以映射到伊辛模型，其中所有的细节都编码在自旋耦合中。原始数学优化的任务相当于找到相应自旋系统的基态，这可以通过依赖绝热定理的量子退火来实现。使用随机方法和与外部环境的耦合可以减轻或解决该过程的一些固有缺点。我们表明，在单个自旋水平上仔细设计系统-浴耦合可以进一步改进退火。

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Improving quantum annealing by engineering the coupling to the environment

A large class of optimisation problems can be mapped to the Ising model where all details are encoded in the coupling of spins. The task of the original mathematical optimisation is then equivalent to finding the ground state of the corresponding spin system which can be achieved via quantum annealing relying on the adiabatic theorem. Some of the inherent disadvantages of this procedure can be alleviated or resolved using a stochastic approach, and by coupling to the external environment. We show that careful engineering of the system-bath coupling at an individual spin level can further improve annealing.

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来源期刊

EPJ Quantum Technology Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

7.70

自引率

7.50%

发文量

审稿时长

71 days

期刊介绍： Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics. EPJ Quantum Technology covers theoretical and experimental advances in subjects including but not limited to the following: Quantum measurement, metrology and lithography Quantum complex systems, networks and cellular automata Quantum electromechanical systems Quantum optomechanical systems Quantum machines, engineering and nanorobotics Quantum control theory Quantum information, communication and computation Quantum thermodynamics Quantum metamaterials The effect of Casimir forces on micro- and nano-electromechanical systems Quantum biology Quantum sensing Hybrid quantum systems Quantum simulations.