Antiferromagnetic long-range order in dissipative Rydberg lattices

We study the dynamics of dissipative spin lattices with power-law interactions, realized via few-level atoms driven by coherent laser-coupling and decoherence processes. Using Monte-Carlo simulations, we determine the phase diagram in the steady state and analyze the dynamics of its generation. As o...

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Bibliographic Details
Published in:arXiv.org 2014-04
Main Authors: Hoening, Michael, Wildan Abdussalam, Fleischhauer, Michael, Pohl, Thomas
Format: Article
Language:English
Subjects:
Antiferromagnetism
Computer simulation
Ising model
Lattices
Long range order
Monte Carlo simulation
Phase diagrams
Phase transitions
Spin dynamics
Steady state
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Summary:We study the dynamics of dissipative spin lattices with power-law interactions, realized via few-level atoms driven by coherent laser-coupling and decoherence processes. Using Monte-Carlo simulations, we determine the phase diagram in the steady state and analyze the dynamics of its generation. As opposed to mean-field predictions and nearest-neighbour models there is no phase transition to long-range ordered phases for realistic interactions and resonant driving. However, for finite laser detunings, we demonstrate the emergence of crystalline order with a vanishing dissipative gap. Although the found steady states differ considerably from those of an equilibrium Ising magnet, the critical exponent of the revealed dissipative phase transition falls into the 2D Ising universality class. Two complementary schemes for an experimental implementation with cold Rydberg atoms are discussed.
ISSN:2331-8422
DOI:10.48550/arxiv.1404.1281