Quantum State Transfer between Two Distant Atoms by ConnectingTwo Cavities via Optical Fibres

Abstract

A scheme is proposed to unconditionally implement state transferbetween two distant atoms by sending the atoms across twodistant cavities connected via an optical fibre, respectively. Thefield state, which preserves the information about the first atom,is transmitted from one cavity to the other along the fibre. AFaraday rotator integrated in the fibre can be designed tocompletely stop the fields reflected from the second cavity, thusafter the field interacts with the second atom for a defined time,the state transfer can be accomplished with unit efficiency.