Improving quantum annealing by engineering the coupling to the environment

EPJ Quantum Technology

Research

Dieter Jaksch¹  David A. W. Hutchinson²  Daniel Schumayer³  Mojdeh S. Najafabadi⁴  Chee-Kong Lee⁵ 

[1] Clarendon Laboratory, University of Oxford, OX1 3PU, Oxford, United Kingdom;Dodd-Walls Centre for Photonic and Quantum Technologies, Dunedin, New Zealand;Clarendon Laboratory, University of Oxford, OX1 3PU, Oxford, United Kingdom;Department of Physics, University of Otago, Dunedin, New Zealand;Dodd-Walls Centre for Photonic and Quantum Technologies, Dunedin, New Zealand;Department of Physics, University of Otago, Dunedin, New Zealand;Dodd-Walls Centre for Photonic and Quantum Technologies, Dunedin, New Zealand;Department of Physics, University of Otago, Dunedin, New Zealand;Max-Planck Institute for the Science of Light, Erlangen, Germany;Tencent America, Palo Alto, USA;

关键词: Quantum annealing;    Quantum computation;    Environmental engineering;    Fidelity;    Ising model;   

DOI  :  10.1140/epjqt/s40507-023-00202-0

 received in 2022-03-01, accepted in 2023-10-10,  发布年份 2023

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY   
© Springer-Verlag GmbH Germany, part of Springer Nature 2023

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