Journal
PHYSICAL REVIEW LETTERS
Volume 117, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.233001
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Funding
- ERC Synergy Grant UQUAM
- Austrian Science Fund through SFB FOQUS (FWF Project) [F4016-N23]
- EU FET Proactive Initiative SIQS
- NSF
- Smithsonian Astrophysical Observatory
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We discuss the generation of subwavelength optical barriers on the scale of tens of nanometers, as conservative optical potentials for cold atoms. These arise from nonadiabatic corrections to Born-Oppenheimer potentials from dressed dark states in atomic. configurations. We illustrate the concepts with a double layer potential for atoms obtained from inserting an optical subwavelength barrier into a well generated by an off-resonant optical lattice, and discuss bound states of pairs of atoms interacting via magnetic dipolar interactions. The subwavelength optical barriers represent an optical Kronig-Penney potential. We present a detailed study of the band structure in optical Kronig-Penney potentials, including decoherence from spontaneous emission and atom loss to open bright channels.
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