Population trapping in a pair of periodically driven Rydberg atoms

2020/09/30 by S. Kumar Mallavarapu, Ankita Niranjan, Weibin Li +3
Physics and Astronomy · #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Demography #Geography #Ion #Ionization #Physics #Population #Quantum chaos and dynamical systems #Quantum mechanics #Quantum optics and atomic interactions #Rydberg atom #Rydberg formula #Sociology #Trapping #cond-mat.quant-gas #quant-ph

paper · pdf · doi:10.1103/physreva.103.023335

published as Phys. Rev. A 103, 023335 (2021) · 11 pages, 8 figures

arxiv created 2021/02/12 · openalex publication_date 2021/02/26 · arxiv updated 2021/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

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