标题： 一个关于量子比特耗散的各向异性Landau-Lifschitz-Gilbert模型 显示英文标题

标题： An Anisotropic Landau-Lifschitz-Gilbert model of dissipation in qubits

摘要： 我们推导了一个描述相互作用的量子比特系统在耗散动力学下的微观模型，该系统耦合到一个热浴中，并且推广了Landau-Lifschitz-Gilbert耗散模型以适用于各向异性浴耦合的情况。 我们证明，耗散作用倾向于使量子轨迹偏向于一个缩小的相空间。 这个模型适用于超导磁通量子比特系统，其与环境的耦合必然具有各向异性。 我们在D-Wave计算设备的背景下研究了该模型，并表明在这种情况下环境耦合的形式产生的动力学与几个基于现象学提出的模型密切相关。 显示英文摘要

摘要： We derive a microscopic model for dissipative dynamics in a system of mutually interacting qubits coupled to a thermal bath that generalises the dissipative model of Landau-Lifschitz-Gilbert to the case of anisotropic bath couplings. We show that the dissipation acts to bias the quantum trajectories towards a reduced phase space. This model applies to a system of superconducting flux qubits whose coupling to the environment is necessarily anisotropic. We study the model in the context of the D-Wave computing device and show that the form of environmental coupling in this case produces dynamics that are closely related to several models proposed on phenomenological grounds.