Generation of Superposition States and Charge-Qubit Relaxation Probing in a Circuit

Details Generation of Superposition States and Charge-Qubit Relaxation Probing in a Circuit Generation of Superposition States and Charge-Qubit Relaxation Probing in a Circuit

2011-04-27

arxiv.org/abs/1104.5189v1

Physics

Quantum Physics

6 pages, 4 figures

Scientific paper

We demonstrate how a superposition of coherent states can be generated for a microwave field inside a coplanar transmission line coupled to a single superconducting charge qubit, with the addition of a single classical magnetic pulse for chirping of the qubit transition frequency. We show how the qubit dephasing induces decoherence on the field superposition state, and how it can be probed by the qubit charge detection. The character of the charge qubit relaxation process itself is imprinted in the field state decoherence profile.

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