Measurement of the Josephson Junction Phase Qubits by a Microstrip Resonator

Details Measurement of the Josephson Junction Phase Qubits by a Microstrip Resonator Measurement of the Josephson Junction Phase Qubits by a Microstrip Resonator

2009-12-18

arxiv.org/abs/0912.3791v1

Physics

Quantum Physics

42 pages, 14 figures

Scientific paper

The process of measurement of a phase qubit by a resonant microwave cavity is considered for various interactions between the qubit and the cavity. A novel quasiclassical approach is described based on adiabatic reversals of the qubit state by an effective field. A similar approach was implemented earlier for the detection of electron and nuclear spins using magnetic resonance force microscopy (MRFM), but this approach has not previously been used for the measurement of a quantum state. Quasiclassical and quantum regimes are described. We consider both linear and nonlinear resonators. The effects of the environment on the process of measurement are also analyzed.

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