Relaxation of a qubit measured by a driven Duffing oscillator

Details Relaxation of a qubit measured by a driven Duffing oscillator Relaxation of a qubit measured by a driven Duffing oscillator

2009-07-29

arxiv.org/abs/0907.5181v2

Physics

Quantum Physics

To appear in Phys. Rev. A (2010)

Scientific paper

We investigate the relaxation of a superconducting qubit for the case when its detector, the Josephson bifurcation amplifier, remains latched in one of its two (meta)stable states of forced vibrations. The qubit relaxation rates are different in different states. They can display strong dependence on the qubit frequency and resonant enhancement, which is due to quasienergy resonances. Coupling to the driven oscillator changes the effective temperature of the qubit.

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