Abstract

A scheme for creating an arbitrary coherent superposition of two atomic states in serial multi-\Lambda-type system is proposed. This technique with the application of a control field is based on the existence of two degenerate dark states and their interaction. The mixing of the dark states can be controlled by changing the relative delay time of the control pulse. One can get any desired superposition by changing the delay time of the control pulse.

© 2008 Chinese Optics Letters

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