Abstract
We present an alternative scheme for preparing the superpositions ofcoherent states along a straight line of a cavity field using degenerateatom-cavity field Raman interaction. In the scheme, a collection ofΛ-type three-level atoms is orderly sent through the cavity to interactwith the cavity field adjusted by a microwave source connected to it,followed by state-selective measurements. In this way, we can prepare thesuperpositions of several coherent states along a straight line witharbitrary weighting factors for the cavity field. In the scheme, thecoherence of the atom-cavity system may be maintained and the secondmicrowave field is unnecessary, which is prior to the previous scheme.
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