Abstract
Cavity quantum electrodynamics (CQED) has played a central role in demonstrating the fundamental principles of the quantum world, and in particular those of atom-light interactions. Developing fast, dynamical and non-mechanical control over a CQED system is particularly desirable for controlling atomic dynamics and building future quantum networks at high speed. However conventional mirrors do not allow for such flexible and fast controls over their coupling to intracavity atoms mediated by photons. Here we theoretically investigate a novel all-optical CQED system composed of a binary Bose-Einstein condensate (BEC) sandwiched by two atomic ensembles. The highly tunable atomic dispersion of the CQED system enables the medium to act as a versatile, all-optically controlled atomic mirror that can be employed to manipulate the vacuum-induced diffraction of matter-wave superradiance. Our study illustrates a innovative all-optical element of atomtroics and sheds new light on controlling light-matter interactions.
Highlights
We investigate the dynamics of SR fields and Bose-Einstein condensate (BEC) by numerically integrate Eqs (1–3)
We have studied the dynamics of a BEC interacting with SR in an all-optical dispersive cavity whose controllability has paved a way for the exquisite manipulation of light-mater interaction
Whereas the present scheme utilizes the cooperative emission from BEC, a down-scaling of the system, e.g., the fundamental question like the behaviour of a single atom in a dispersive cavity deserves more detailed studies
Summary
Based on EIT13,23–26, as illustrated, each 3-level atomic medium constitutes a mirror when interacting with two counter-propagating coupling fields with Rabi frequencies Ω±c driving the 2 ↔ 3 transition. In the presence of the counter-propagating coupling and SR fields, the total Hamiltonian of the EIT medium is given by H = H 0 + HI where H 0 = ∑ j ω j j j and H I describes the atom-light interaction: HI
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