Quantum Coherent Control of Current and Chiral Cat States
by
Ioannis Thanopulos
Weizmann Institute of Science
Coauthors: Petr Kral, Moshe Shapiro

We develop a robust methodology for preparation of novel quantum entangled states, by combining phase-sensitive coherent control techniques with the use of nonclassical light states. The idea is that population components of different ``semiclassical phases" in such light states guide the system to different components of the entangled states. Thus, a system of the |A> and |B> material states, driven by light in the |alpha> +|-alpha> cat state, can get in the |A>|alpha> + |B>|-alpha> entangled state. In this way, we can prepare ``current" or ``chiral" cat states, if |A> and |B> are momentum states of opposite directionality or chiral states of left-handed and right-handed symmetries, respectively.

Date received: May 19, 2004