论文标题
有效的哈密顿量与可调混合配对在驱动的光学晶格中
Effective Hamiltonian with tunable mixed pairing in driven optical lattices
论文作者
论文摘要
超速费米气体中的混合配对会产生有趣的多体相，例如支持Majorana零模式（MZM）的拓扑非平凡超级流体，并具有各种空间构型。不幸的是，在普通的晶格系统中，拓扑阶段和相关的MZM被主要的$ s $波配对抑制。在这里，我们提出了一项提案，以根据驱动的光学晶格进行工程有效的汉密尔顿人，并具有可调的混合现场配对。可以通过周期性驾驶场而不是磁性的feshbach共振来独立更改现场配对。它为抑制了主导的现场相互作用铺平了道路，从而使拓扑超流体的出现和合成在边缘或角落的MZMS的综合。
Mixed pairing in ultracold Fermi gases can give rise to interesting many-body phases, such as topological nontrivial superfluids that support Majorana zero modes (MZMs) with various spatial configurations. Unfortunately, in ordinary lattice systems, the topological phase and the associated MZMs are suppressed by the dominant $s$-wave pairing. Here we present a proposal for engineering effective Hamiltonians with tunable mixed on- and off-site pairing based on driven optical lattices. The on- and off-site pairing can be changed independently by means of a periodical driving field rather than magnetic Feshbach resonances. It paves the way for suppressing the dominant on-site interaction that frustrates the emergence of topological superfluids and for synthesizing MZMs localized in edges or corners.
