Dipole-dipole-interaction-driven antiblockade of two Rydberg atoms

Su, Shi Lei; Li, Weibin

Abstract

Resonant laser excitation of multiple Rydberg atoms are prohibited, leading to Rydberg blockade, when the long-range van der Waals interactions are stronger than the laser-atom coupling. Rydberg blockade can be violated, i.e., simultaneous excitation of more than one Rydberg atom, by off-resonant laser excitation, causing an excitation antiblockade. Rydberg antiblockade gives rise to strongly correlated many-body dynamics and spin-orbit coupling and also finds quantum computation applications. Instead of commonly used van der Waals interactions, we investigate antiblockade dynamics of two Rydberg atoms interacting via dipole-dipole exchange interactions. We study typical situations in current Rydberg atom experiments, where different types of dipole-dipole interactions can be achieved by varying Rydberg state couplings. An effective Hamiltonian governing underlying antiblockade dynamics is derived. We illustrate that geometric gates can be realized with the Rydberg antiblockade which is robust against the decay of Rydberg states. Our study may stimulate new experimental and theoretical exploration of quantum optics and strongly interacting many-body dynamics with Rydberg antiblockade driven by dipole-dipole interactions.

Citation

Su, S. L., & Li, W. (2021). Dipole-dipole-interaction-driven antiblockade of two Rydberg atoms. Physical Review A, 104(3), Article 033716. https://doi.org/10.1103/PhysRevA.104.033716

• Journal Article Type: Article
• Acceptance Date: Sep 13, 2021
• Online Publication Date: Sep 27, 2021
• Publication Date: Sep 1, 2021
• Deposit Date: Sep 14, 2021
• Publicly Available Date: Sep 17, 2021
• Journal: Physical Review A
• Print ISSN: 2469-9926
• Electronic ISSN: 2469-9934
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 104
• Issue: 3
• Article Number: 033716
• DOI: https://doi.org/10.1103/PhysRevA.104.033716
• Public URL: https://nottingham-repository.worktribe.com/output/6238654
• Publisher URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.104.033716?ft=1