论文标题
在结构化浴中的巨大原子的衰减动力学，时间为反转对称性
Decay dynamics of a giant atom in a structured bath with broken time-reversal symmetry
论文作者
论文摘要
我们在本文中研究了一个两级巨型原子的衰减动力学，该原子与均匀的一维锯齿状晶格耦合，暴露于均匀的合成磁通量。如果两个sublatices具有较大的失谐，则巨大原子有效地耦合到具有通量控制的能量带和时间反转对称性的单带结构化浴缸。该特征显着影响巨型原子的衰减动力学以及发射光子的传播。特别是，巨大原子可以表现出手性的自发发射，并允许非偏射延迟光，但是，通过将小原子耦合到该晶格而无法实现。可以设计具有不同频率的巨型原子，以朝着不同方向和不同群体速度发射光子。我们的结果为工程量子网络和操纵巨大原子干扰效应铺平了道路。
We study in this paper the decay dynamics of a two-level giant atom, which is coupled to a quasi-one-dimensional sawtooth lattice exposed to uniform synthetic magnetic fluxes. In the case where the two sublattices have a large detuning, the giant atom is effectively coupled to a single-band structured bath with flux-controlled energy band and time-reversal symmetry. This feature significantly affects the decay dynamics of the giant atom as well as the propagation of the emitted photon. In particular, the giant atom can exhibit chiral spontaneous emission and allow for nonreciprocal delayed light, which are however unattainable by coupling a small atom to this lattice. Giant atoms with different frequencies can be designed to emit photons towards different directions and with different group velocities. Our results pave the way towards engineering quantum networks and manipulating giant-atom interference effects.
