Regular Article - Quantum Optics
Steady-state quantum phase transition in a Jaynes–Cummings–Hubbard model with quantized center-of-mass motions
Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, 730000, Lanzhou, Gansu, China
2 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, 730000, Lanzhou, China
Accepted: 9 September 2021
Published online: 1 October 2021
We study the steady-state quantum phase transition of the Jaynes–Cummings–Hubbard model with quantized center-of-mass motions by using a mean-field method. Four different quantum phases emerge due to the interplay between the atom–photon interaction modulated by the center-of-mass motion and the tunneling of photons. Importantly, as the amplitude of the atomic oscillations increases, the phase boundaries will become more and more blurred. We also observed that the phase diagram changes periodically with the change of the relative position between the trap center and the cavity field.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021