Journal
PHYSICAL REVIEW LETTERS
Volume 119, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.023603
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Funding
- MIT-Harvard Center for Ultracold Atoms
- NSF
- AFOSR
- MURI
- Hungary Initiative Foundation
- Carlsberg Foundation
- MINECO Severo Ochoa Program [SEV-2015-0522]
- Fundacio Privada Cellex
- CERCA Programme/Generalitat de Catalunya
- ERC Starting Grant FOQAL
- SFB FOQUS of the Austrian Science Fund
- ERC Synergy Grant UQUAM
- Division Of Physics
- Direct For Mathematical & Physical Scien [1607637] Funding Source: National Science Foundation
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We demonstrate that two-dimensional atomic emitter arrays with subwavelength spacing constitute topologically protected quantum optical systems where the photon propagation is robust against large imperfections while losses associated with free space emission are strongly suppressed. Breaking time-reversal symmetry with a magnetic field results in gapped photonic bands with nontrivial Chern numbers and topologically protected, long-lived edge states. Due to the inherent nonlinearity of constituent emitters, such systems provide a platform for exploring quantum optical analogs of interacting topological systems.
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