Zhu, ChuanzhouDong, LinPu, Han2017-05-222017-05-222016Zhu, Chuanzhou, Dong, Lin and Pu, Han. "Effects of spin-orbit coupling on Jaynes-Cummings and Tavis-Cummings models." <i>Physical Review A,</i> 94, no. 5 (2016) American Physical Society: https://doi.org/10.1103/PhysRevA.94.053621.https://hdl.handle.net/1911/94345We consider ultracold atoms inside a ring optical cavity that supports a single plane-wave mode. The cavity field, together with an external coherent laser field, drives a two-photon Raman transition between two internal pseudospin states of the atom. This gives rise to an effective coupling between atom's pseudospin and external center-of-mass (COM) motion. For the case of a single atom inside the cavity, We show how the spin-orbit coupling modifies the static and dynamic properties of the Jaynes-Cummings (JC) model. In the case of many atoms in thermodynamic limit, we show that the spin-orbit coupling modifies the Dicke superradiance phase transition boundary and the non-superradiant normal phase may become reentrant in some regimes.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttps://doi.org/10.1103/PhysRevA.94.053621