论文标题
部分可观测时空混沌系统的无模型预测
Superfluid signatures in a dissipative quantum point contact
论文作者
论文摘要
我们通过与局部自旋依赖性粒子损失的量子接触来测量强烈相互作用的纤维素锂原子的超流体转运。我们观察到，由于耗散强度超过了超级流体间隙，因此高阶多重Andreev反射转变为多余的欧姆电流。我们开发了一个模型，该模型通过隧穿连接到耗散部位，该模型。我们在Keldysh形式主义中的计算重现了观察到的非平衡粒子电流，但不能完全解释观察到的损耗率或自旋电流。
We measure superfluid transport of strongly interacting fermionic lithium atoms through a quantum point contact with local, spin-dependent particle loss. We observe that the characteristic non-Ohmic superfluid transport enabled by high-order multiple Andreev reflections transitions into an excess Ohmic current as the dissipation strength exceeds the superfluid gap. We develop a model with mean-field reservoirs connected via tunneling to a dissipative site. Our calculations in the Keldysh formalism reproduce the observed nonequilibrium particle current, yet do not fully explain the observed loss rate or spin current.
