Superradiant Quantum Phase transition in Rashba Cavity QED
Mardi 19 novembre 2019 14:00
- Duree : 1 heure
Lieu : Salle « Remy Lemaire » (K223) de l’Institut Néel – au n°25 de la rue des martyrs, Grenoble.
Orateur : Pierre NATAF (LPMMC, Grenoble)
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Resumé / Abstract :
In cavity quantum electrodynamics (QED), the interaction between an atomic transition and the cavity field is measured by the vacuum Rabi frequency omega_0. The regime with omega_0 comparable to the two-level transition frequency is called the ultrastrong coupling regime. In such a regime, and for a large number of atoms coupled to the same cavity mode, a superradiant quantum phase transitions (SQPT) has been predicted, e.g. within the Dicke model.
In this theoretical seminar, I will briefly describe the SQPT at equilibrium, discuss the experimental context, and present our recent proposal where a 2DEG with Rashba spin-orbit coupling placed inside an optical cavity can exhibit the SQPT.
Ref : P. Nataf, T. Champel, G. Blatter, and D. M. Basko, Rashba cavity qed : a route towards the superradiant quantum phase transition, arXiv:1907.02938 (2019)
Contact : robert.whitney@grenoble.cnrs.fr
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