Dispersionless subradiant photon storage in onedimensional emitter chains
Abstract
Atomic emitter ensembles couple collectively to the radiation field. Although an excitation on a single emitter may be shortlived, a collection of them can contain a photon several orders of magnitude longer than the single emitter lifetime. We provide the exact conditions for optimal absorption, longlived and dispersionless storage, and release, of a single photon in a subwavelength onedimensional lattice of twolevel emitters. In particular, we detail two storage schemes. The first is based on the uncovering of approximate flat sections in the singlephoton spectrum, such that a single photon can be stored as a wave packet with effective zero group velocity. For the second scheme we exploit the angular dependence of the interactions induced between the emitters and mediated via exchange of virtual photons, which on a ring gives rise to an effective trapping potential for the photon. In both cases, we are able to obtain, within current experimentally accessible parameters, highfidelity photon storage for times hundreds of times longer than the single emitter lifetime.
 Publication:

arXiv eprints
 Pub Date:
 March 2023
 DOI:
 10.48550/arXiv.2303.13564
 arXiv:
 arXiv:2303.13564
 Bibcode:
 2023arXiv230313564C
 Keywords:

 Quantum Physics;
 Physics  Atomic Physics;
 Physics  Optics
 EPrint:
 7+4 pages, 5+4 figures, comments welcome