Quantum theory of the low-frequency linear susceptibility of interferometer-type superconducting qubits
arXiv:0709.2459 · doi:10.1103/PhysRevB.77.094513
Abstract
We use the density matrix formalism to analyze the interaction of interferometer-type superconducting qubits with a high quality tank circuit, which frequency is well below the gap frequency of a qubit. We start with the ground state characterization of the superconducting flux and charge qubits. Then, by making use of a dressed state approach we describe the qubits' spectroscopy when the qubit is irradiated by a microwave field which is tuned to the gap frequency. The last section of the paper is devoted to continuous monitoring of qubit states by using a DC SQUID in the inductive mode.
11 pages, 5 figures; the title and abstract are slightly changed; several typos are corrected; in order to make our argumentation more clear we added some comments in the introduction and other sections
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Cited by in corpus (7)
- Inverse Landau-Zener-Stuckelberg problem for qubit-resonator systems
- Multiphoton transitions in Josephson-junction qubits (Review Article)
- Resonant excitations of single and two-qubit systems coupled to a tank circuit
- Low-frequency spectroscopy for quantum multi-level systems
- Cooling a magnetic resonance force microscope via the dynamical back-action of nuclear spins
- Signal amplification in a qubit-resonator system
- Coherent Rabi response of a charge-phase qubit under microwave irradiation