Josephson charge-phase qubit with radio frequency readout: coupling and decoherence
arXiv:cond-mat/0312225 · doi:10.1134/1.1777638
Abstract
The charge-phase Josephson qubit based on a superconducting single charge transistor inserted in a low-inductance superconducting loop is considered. The loop is inductively coupled to a radio-frequency driven tank circuit enabling the readout of the qubit states by measuring the effective Josephson inductance of the transistor. The effect of qubit dephasing and relaxation due to electric and magnetic control lines as well as the measuring system is evaluated. Recommendations for operation of the qubit in magic points producing minimum decoherence are given.
arXiv comment11 pages incl. 6 figs
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Cited by in corpus (11)
- An RF-Driven Josephson Bifurcation Amplifier for Quantum Measurements
- Decoherence of a Josephson qubit due to coupling to two level systems
- Decoherence of a two-qubit system with a variable bath coupling operator
- Bloch inductance in small-capacitance Josephson junctions
- Period-doubling-bifurcation readout for a Josephson qubit
- Superconducting phase qubit based on the Josephson oscillator with strong anharmonicity
- Quantum superposition of three macroscopic states and superconducting qutrit detector
- Dynamics of Josephson junctions and single-flux-quantum networks with superconductor-insulator-normal metal junction shunts
- Dynamical reentrance and geometry imposed quantization effects in Nb-AlOx-Nb Josephson junction arrays
- Ground-state characterization of Nb charge-phase Josephson qubits
- Quasi-particle transitions in charge-phase qubits probed by rf oscillations