Eur. Phys. J. D (2017) 71: 4
https://doi.org/10.1140/epjd/e2016-70599-0

Regular Article

Rabi splitting in a quantum well system with Rashba spin-orbital coupling

¹ Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, P.R. China
² Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory for UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, P.R. China

^a e-mail: wangzh761@nenu.edu.cn

Received: 27 September 2016
Received in final form: 8 November 2016
Published online: 10 January 2017

Abstract

We study the Rabi splitting phenomenon in a quantum well system with Rashba spin-orbital coupling where the spin degree of freedom is driven weakly by an external field. The dynamics of the system can be described by the Jaynes-Cummings model. As we increase the strength of spin-orbital coupling, the system undergoes an energy-level crossing which does not occure in the traditional cavity and circuit QED setups. We find that the intuitive rotating wave approximation in the driving Hamiltonian is ineffective when the energy-level crossing occurs. We also give a physical understanding based on the dressed-state representation.