Strongly localized polaritons in an array of trapped two-level atoms interacting with a light field - Condensed Matter > Quantum GasesReport as inadecuate




Strongly localized polaritons in an array of trapped two-level atoms interacting with a light field - Condensed Matter > Quantum Gases - Download this document for free, or read online. Document in PDF available to download.

Abstract: We propose a new type of spatially periodic structure, i.e. polaritoniccrystal PolC, to observe a -slow-stopped- light phenomenon due to coupledatom-field states polaritons in a lattice. Under the tightbindingapproximation, such a system realizes an array of weakly coupled trappedtwo-component atomic ensembles interacting with optical field in atunnel-coupled one dimensional cavity array. We have shown that the phasetransition to the superfluid Bardeen-Cooper-Schrieffer state, a so-calledBCS-type state of low branch polaritons, occurs under the strong couplingcondition. Such a transition results in the appearance of a macroscopicpolarization of the atomic medium at non-zero frequency. The principal resultis that the group velocity of polaritons depends essentially on the orderparameter of the system, i.e. on the average photon number in the cavity array.



Author: A. P. Alodjants, I. O. Barinov, S. M. Arakelian

Source: https://arxiv.org/







Related documents