Journal
OPTICS LETTERS
Volume 47, Issue 5, Pages 1093-1096Publisher
Optica Publishing Group
DOI: 10.1364/OL.450855
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Funding
- National Natural Science Foundation of China [11975198]
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This study investigates neutral atoms coupled to a highly excited Rydberg state on a two-dimensional triangular lattice using the density matrix renormalization group technique. The behavior of entanglement entropy is used to determine the full ground-state phase diagram as a function of blockade radius and the detuning of the exciting laser. Several quantum phases are identified, including stripe-ordered and symmetry-breaking density-wave-ordered phases.
The neutral atoms coupled to a highly excited Rydberg state on a two-dimensional triangular lattice are investigated by employing the density matrix renormalization group technique in the matrix product state form. The full ground-state phase diagram as a function of blockade radius and the detuning of the exciting laser is determined by the behavior of entanglement entropy. We find several quantum phases including stripe-ordered and symmetry-breaking density-wave-ordered phases featured with regular excitation patterns of different excitation densities rho = 1/3, 1/4, and 1/7. In addition, a rho = 2/3 ordered phase and an interesting order-by-disorder phase, which has been prepared experimentally, are also observed in this work. Our work provides an exploration of the possible quantum phases that can occur in a triangularly arrayed Rydberg system, and thus could be a faithful theoretical guide for further experimental research. (C) 2022 Optica Publishing Group
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