Period-doubling-bifurcation readout for a Josephson qubit
arXiv:1101.2712 · doi:10.1103/PhysRevB.83.224506
Abstract
We propose a threshold detector with an operation principle, based on a parametric period-doubling bifurcation in an externally pumped nonlinear resonance circuit. The ac-driven resonance circuit includes a dc-current-biased Josephson junction ensuring parametric frequency conversion (period-doubling bifurcation) due to its quadratic nonlinearity. A sharp onset of oscillations at the half-frequency of the drive allows for detection of small variations of an effective inductance and, therefore, the read-out of the quantum state of a coupled Josephson qubit. The bifurcation characteristics of this circuit are compared with those of the conventional Josephson bifurcation amplifier, and its possible advantages are discussed.
6 pages
References in corpus (8)
- Single-shot qubit readout in circuit Quantum Electrodynamics
- Single-shot qubit readout in circuit Quantum Electrodynamics
- Photon generation in an electromagnetic cavity with a time-dependent boundary
- Switching via quantum activation: A parametrically modulated oscillator
- High-contrast dispersive readout of a superconducting flux qubit using a nonlinear resonator
- Nondestructive readout for a superconducting flux qubit
- Measuring the Decoherence of a Quantronium Qubit with the Cavity Bifurcation Amplifier
- Superconducting phase qubit based on the Josephson oscillator with strong anharmonicity
Cited by in corpus (11)
- Kerr-free three-wave mixing in superconducting quantum circuits
- Josephson parametric phase-locked oscillator and its application to dispersive readout of superconducting qubits
- Microwave photon detection at parametric criticality
- Applications of the Fokker-Planck equation in circuit quantum electrodynamics
- Relaxation dynamics and dissipative phase transition in quantum oscillators with period tripling
- An rf-SQUID-based traveling-wave parametric amplifier with -84 dBm input saturation power across more than one octave bandwidth
- Quantum properties of a strongly driven Josephson junction
- Superconducting microwave resonators with non-centrosymmetric nonlinearity
- Traveling-wave parametric amplifier based on three-wave mixing in a Josephson metamaterial
- Numerical simulation methods for quantum sensing at parametric criticality
- Theory of high-power excitation spectra of rf-SQUID