Exploring nonequilibrium phases of the generalized Dicke model with a trapped Rydberg-ion quantum simulator

Gambetta, F. M.; Lesanovsky, I.; Li, W.

Abstract

Trapped ions are a versatile platform for the investigation of quantum many-body phenomena, in particular for the study of scenarios where long-range interactions are mediated by phonons. Recent experiments have shown that the trapped ion platform can be augmented by exciting high-lying Rydberg states. This introduces controllable state-dependent interactions that are independent of the phonon structure. However, the many-body physics in this newly accessible regime is largely unexplored. We show that this system grants access to generalized Dicke model physics, where dipolar interactions between ions in Rydberg states drastically alter the collective nonequilibrium behavior. We analyze and classify the emerging dynamical phases and identify a host of nonequilibrium signatures such as multiphase coexistence regions and phonon-lasing regimes. We moreover show how they can be detected and characterized through the fluorescence signal of scattered photons. Our study thus highlights interesting capabilities of trapped Rydberg-ion systems for creating and detecting quantum nonequilibrium phases.

Citation

Gambetta, F. M., Lesanovsky, I., & Li, W. (2019). Exploring nonequilibrium phases of the generalized Dicke model with a trapped Rydberg-ion quantum simulator. Physical Review A, 100(2), Article 022513. https://doi.org/10.1103/physreva.100.022513

• Journal Article Type: Article
• Acceptance Date: Aug 1, 2019
• Online Publication Date: Aug 23, 2019
• Publication Date: Aug 23, 2019
• Deposit Date: Aug 28, 2019
• Publicly Available Date: Sep 2, 2019
• Journal: Physical Review A
• Print ISSN: 2469-9926
• Electronic ISSN: 2469-9934
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 100
• Issue: 2
• Article Number: 022513
• DOI: https://doi.org/10.1103/physreva.100.022513
• Public URL: https://nottingham-repository.worktribe.com/output/2511223
• Publisher URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.100.022513
• Additional Information: Exploring nonequilibrium phases of the generalized Dicke model with a trapped Rydberg-ion quantum simulator, F. M. Gambetta, I. Lesanovsky, and W. Li, Phys. Rev. A 100, 022513.