Effect of the Diamagnetic term in the ultra-strong coupling regime
Physics and Quantum Technology team, Condensed Matter Physics Laboratory, Ben M’sik Faculty of Sciences, Hassan II Casablanca University Morocco
Published online: 15 January 2019
We consider a set of two level atoms interacting with a single quantized bosonic mode governed by the Dicke model. In this model it is well known that under a critical value of the light-matter coupling a spontaneous radiation process takes place. In the present work, we investigate the dynamics of the system and we study the Wigner distribution function to visualize the effect of the minimal coupling on the ground state wavefunction from the normal phase to the superradiant one. We show also that the entanglement of Bi-partite model is limited by the presence of the diamagnetic term.
Key words: Entanglement / diamagnetic term / Cavity QED / Circuit QED
Key words: 03.67.Lx / 85.25.Dq / 42.50.Dv
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.