论文标题
北极多末端约瑟夫森连接中的Weyl奇异性
Weyl singularities in polaritonic multi-terminal Josephson junctions
论文作者
论文摘要
我们研究理论上类似于多末端的约瑟夫森连接，该连接是由在腔激素激子 - 摩尔体泵上产生的宽大的超流体形成的。我们研究了由Quasi-Momenta的超氟相位创建的4D参数空间中的5末端交界处的$ p $样带。我们在3D子空间中找到4/6 WEYL点，其时间为反转对称性。我们将真实空间拓扑（涡流）链接到参数空间一个（Weyl点）。我们得出了一个有效的哈密顿人，编码4D中Weyl节点的创建，运动和an灭。我们的工作为研究外来拓扑阶段的研究铺平了道路，允许直接测量本征态和带拓扑。
We study theoretically analog multi-terminal Josephson junctions formed by gapped superfluids created upon resonant pumping of cavity exciton-polaritons. We study the $p$-like bands of a 5-terminal junction in the 4D parameter space created by the superfluid phases acting as quasi-momenta. We find 4/6 Weyl points in 3D subspaces with preserved/broken time-reversal symmetry. We link the real space topology (vortices) to the parameter space one (Weyl points). We derive an effective Hamiltonian encoding the creation, motion, and annihilation of Weyl nodes in 4D. Our work paves the way to the study of exotic topological phases in a platform allowing direct measurement of eigenstates and band topology.
