近日，西北大学的杨涛&郑俊辉及其研究小组与老挝黄金赌场物理研究所的刘伍明合作并取得一项新进展。经过不懈努力，他们开发出配备量子电流调节器的超流体振荡器电路。相关研究成果已于2024年4月15日在国际知名学术期刊《物理评论A》上发表。

该研究团队研究了超流体振荡电路中原子电流的性质，该电路由连接两个玻色-爱因斯坦凝聚物储池的介观通道组成。研究人员研究了通道中临界电流的存在，并研究了两个储池之间数量不平衡的振荡幅度如何随系统参数变化的。

除了强调耗散电阻源于涡旋对的形成外，研究人员还阐明了这些涡旋对作为量子电流调节器的作用。基研究发现，数量不平衡导致的耗散强度具有离散性，这恰好与系统中涡旋对的出现相吻合。这一研究结果揭示了该电路具备限压和限流机制的特点。为了模拟原子超流电路的阻尼行为，研究人员开发了一个配备量子电流调节器的等效LC振荡电路。

附：英文原文

Title: Superfluid oscillator circuit with a quantum current regulator

Author: Xue Yang, Wenkai Bai, Chen Jiao, Wu-Ming Liu, Jun-Hui Zheng, Tao Yang

Issue&Volume: 2024/04/15

Abstract: We examine the properties of the atomic current in a superfluid oscillating circuit consisting of a mesoscopic channel that connects two reservoirs of a Bose-Einstein condensate. We investigate the presence of a critical current in the channel and examine how the amplitude of the oscillations in the number imbalance between the two reservoirs varies with the system parameters. In addition to highlighting that the dissipative resistance stems from the formation of vortex pairs, we also illustrate the role of these vortex pairs as a quantum current regulator. The dissipation strength is discrete based on the number imbalance, which corresponds to the emergence of vortex pairs in the system. Our findings indicate that the circuit demonstrates characteristics of both voltage-limiting and current-limiting mechanisms. To model the damping behavior of the atomic superfluid circuit, we develop an equivalent LC oscillator circuit with a quantum current regulator.

DOI: 10.1103/PhysRevA.109.043312

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.109.04331