Resonant excitations of single and two-qubit systems coupled to a tank circuit

Abstract

The interaction of flux qubits with a low frequency tank circuit is studied. It is shown that changes in the state of the interacting qubits influence the effective impedance of the circuit, which is the essence of the so-called impedance measurement technique. The multiphoton resonant excitations in both single flux qubits and pairs of coupled flux qubits are investigated. In particular, we compare our theoretical results with recent spectroscopy measurements, Landau-Zener interferometry, and multiphoton fringes.

11 pages, 11 figures; v.2: minor changes

References in corpus (12)

• Two-level systems driven by large-amplitude fields
• Spectroscopy on two coupled flux qubits
• Single-qubit lasing and cooling at the Rabi frequency
• Sisyphus cooling and amplification by a superconducting qubit
• Consistency of ground state and spectroscopic measurements on flux qubits
• Low-frequency measurement of the tunneling amplitude in a flux qubit
• Direct Josephson coupling between superconducting flux qubits
• Reading-out the state inductively and microwave spectroscopy of an interferometer-type charge qubit
• Spectroscopy of three strongly coupled flux qubits
• Low frequency Rabi spectroscopy for a dissipative two-level system
• Impedance measurement technique for quantum systems
• Quantum theory of the low-frequency linear susceptibility of interferometer-type superconducting qubits

Cited by in corpus (5)

• Memory effects in complex materials and nanoscale systems
• Multiphoton transitions in Josephson-junction qubits (Review Article)
• Quantum behaviour of a flux qubit coupled to a resonator
• The information about the state of a qubit gained by a weakly coupled detector
• Delayed-response quantum back-action in nanoelectromechanical systems