Relaxation of a qubit measured by a driven Duffing oscillator

Abstract

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.

To appear in Phys. Rev. A (2010)

References in corpus (10)

• Low- and high-frequency noise from coherent two-level systems
• Basins of attraction of a nonlinear nanomechanical resonator
• Sisyphus cooling and amplification by a superconducting qubit
• Nondestructive readout for a superconducting flux qubit
• Critical exponents in metastable decay via quantum activation
• Measuring the Decoherence of a Quantronium Qubit with the Cavity Bifurcation Amplifier
• Role of relaxation in the quantum measurement of a superconducting qubit using a nonlinear oscillator
• Dynamical tunneling in macroscopic systems
• Phase-space theory for dispersive detectors of superconducting qubits
• Crossover from weak to strong coupling regime in dispersive circuit QED

Cited by in corpus (19)

• Circuit QED with a Nonlinear Resonator : ac-Stark Shift and Dephasing
• Quantum heating of a parametrically modulated oscillator: spectral signatures
• Quantum limited amplification with a nonlinear cavity detector
• Backaction of a driven nonlinear resonator on a superconducting qubit
• Quantum Heating of a nonlinear resonator probed by a superconducting qubit
• Photon-noise-tolerant dispersive readout of a superconducting qubit using a nonlinear Purcell filter
• Emission spectrum of the driven nonlinear oscillator
• Weak Qubit Measurement with a Nonlinear Cavity: Beyond Perturbation Theory
• Quantum fluctuations in modulated nonlinear oscillators
• Superconducting qubit as a probe of quantum fluctuations in a nonlinear resonator
• Quantum noise properties of multiphoton transitions in driven nonlinear resonators
• The dissipative quantum Duffing oscillator: a comparison of Floquet-based approaches
• Driving-induced resonance narrowing in a strongly coupled cavity-qubit system
• Superharmonic Resonances in a Strongly Coupled Cavity-Atom System
• Out-of-equilibrium quantum thermodynamics in the Bloch sphere: temperature and internal entropy production
• Hybrid phase-space--Fock-space approach to evolution of a driven nonlinear resonator
• Dephasing of a Qubit due to Quantum and Classical Noise
• Ideal Quantum non-demolishing measurement of a flux qubit at variable bias
• The role of damping for the driven anharmonic quantum oscillator