Dark states of dressed Bose-Einstein condensates

Abstract

We combine the ideas of dressed Bose-Einstein condensates, where an intracavity optical field allows one to design coupled, multicomponent condensates, and of dark states of quantum systems, to generate a full quantum entanglement between two matter waves and two optical waves. While the matter waves are macroscopically populated, the two optical modes share a single photon. As such, this system offers a way to influence the behaviour of a macroscopic quantum system via a microscopic ``knob''.Comment: 6 pages, no figur

How to trap photons? Storing single-photon quantum states in collective atomic excitations

“…Recently this approach has also been applied to the treatment of a "photon blockade" in a cavity EIT setup [27]. In different context, similar ideas were used to describe dark states in Bose-Einstein Condensates [28].…”

Dark states of dressed spinor Bose-Einstein condensates of spin-1 atoms

“…When there are more than one atom, the coupling effect will be enhanced. Several previous research has investigated cavity QED with a BEC theoretically and experimentally [10,11,12,13,14,15,16]. Dressed state of BEC is confirmed [15].…”

“…Dressed state of BEC is confirmed [15]. For a multicomponent condensates, it is shown that dark states of dressed BEC exist [16]. When the dressed BEC is in dark state, no atom is state at excited state, but oscillate between two ground states of Λ type energy level atom.…”

Space of dark states in Tavis-Cummings model

“…Dark states have numerous uses. In particular, their role in the organization of inter-atomic interaction was considered in the work [26], for the control of solid-state spins -in work [22], for the control of macroscopic quantum systems -in work [27], one of the effects of the dark state in the light-harvesting complex can be found in the work [25]. Some methods for obtaining dark states in quantum dots can be read in papers [20], and also in [21].…”