Antiferromagnet phase of a square Rydberg lattice in the ladder configuration

We study the Rydberg excitation of a square atomic lattice driven by a pumping and a coupling fields into the ladder configuration via Monte Carlo simulations based on density matrix equations. Single-atom Rydberg population can be very close to unit benefiting from the formation of a dark state suc...

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Bibliographic Details
Published in:The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2021-09, Vol.75 (9), Article 249
Main Authors: Zhai, Shang-Yu, Liu, Yi-Mou, Wu, Jin-Hui
Format: Article
Language:English
Subjects:
Antiferromagnetism
Applications of Nonlinear Dynamics and Chaos Theory
Atomic
Configurations
Coupling
Molecular
Optical and Plasma Physics
Physical Chemistry
Physics
Physics and Astronomy
Pumping
Quantum Information Technology
Quantum Physics
Rabi frequency
Regular Article - Atomic Physics
Spectroscopy/Spectrometry
Spintronics
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Summary:We study the Rydberg excitation of a square atomic lattice driven by a pumping and a coupling fields into the ladder configuration via Monte Carlo simulations based on density matrix equations. Single-atom Rydberg population can be very close to unit benefiting from the formation of a dark state such that the antiferromagnet (AFM) phase has been observed at finite two-photon detunings owing to moderate van der Waals ( vdW ) interactions. We note in particular that the pumping Rabi frequency is more important than the coupling Rabi frequency in manipulating the AFM phase to occur for specific pumping detunings, coupling detunings, and nearest-neighbor vdW potentials. Moreover, the AFM phase may enter a saturation regime in terms of its parameter region when the boundary effect of vdW interactions is negligible for a large enough lattice size.
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/s10053-021-00264-8