论文标题
费米金约瑟夫森连接处的耗散机制
Dissipation Mechanisms in Fermionic Josephson Junction
论文作者
论文摘要
我们从数值上表征了超电量超速约瑟夫森交界处的主要动力学状态。除了连贯的约瑟夫森等离子体制度之外，我们还讨论了由于超过特征速度而引起的耗散的发作和物理机制，并提供了明确的证据，尽管仅对全球特征的定性动力学仅对操作耗散机制敏感，但在弱且强烈相互互动的范围内区分了其物理机制。具体而言，在强烈相互作用方向上的耗散是通过量子涡流的发射和传播引起的，与bose-内的凝结限制相似。取而代之的是，在弱相互作用极限下，主要的耗散通道是通过破坏的机制产生的。
We characterize numerically the dominant dynamical regimes in a superfluid ultracold fermionic Josephson junction. Beyond the coherent Josephson plasma regime, we discuss the onset and physical mechanism of dissipation due to the superflow exceeding a characteristic speed, and provide clear evidence distinguishing its physical mechanism across the weakly- and strongly-interacting limits, despite qualitative dynamics of global characteristics being only weakly sensitive to the operating dissipative mechanism. Specifically, dissipation in the strongly interacting regime occurs through the phase-slippage process, caused by the emission and propagation of quantum vortices, and sound waves -- similar to the Bose-Einstein condensation limit. Instead, in the weak interaction limit, the main dissipative channel arises through the pair-breaking mechanism.
