Population trapping in a pair of periodically driven Rydberg atoms

Mallavarapu, S. Kumar; Niranjan, Ankita; Li, Weibin; W�ster, Sebastian; Nath, Rejish

Abstract

We study the population trapping extensively in a periodically driven Rydberg pair. The periodic modulation of the atom-light detuning effectively suppresses the Rabi couplings and, together with Rydberg-Rydberg interactions, leads to the state-dependent population trapping. We identify a simple yet general scheme to determine population trapping regions using driving-induced resonances, the Floquet spectrum, and the inverse participation ratio. Contrary to the single-atom case, we show that the population trapping in the two-atom setup may not necessarily be associated with level crossings in the Floquet spectrum. Further, we discuss under what criteria population trapping can be related to dynamical stabilization, taking specific and experimentally relevant initial states, which include both product and the maximally entangled Bell states. The behavior of the entangled states is further characterized by the bipartite entanglement entropy.

• Journal Article Type: Article
• Acceptance Date: Feb 12, 2021
• Online Publication Date: Feb 26, 2021
• Publication Date: Feb 26, 2021
• Deposit Date: Feb 26, 2021
• Publicly Available Date: Mar 1, 2021
• Journal: Physical Review A
• Print ISSN: 2469-9926
• Electronic ISSN: 2469-9934
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 103
• Issue: 2
• Article Number: 023335
• DOI: https://doi.org/10.1103/physreva.103.023335
• Public URL: https://nottingham-repository.worktribe.com/output/5353269
• Publisher URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.103.023335