First-order sidebands in circuit QED using qubit frequency modulation

Abstract

Sideband transitions have been shown to generate controllable interaction between superconducting qubits and microwave resonators. Up to now, these transitions have been implemented with voltage drives on the qubit or the resonator, with the significant disadvantage that such implementations only lead to second-order sideband transitions. Here we propose an approach to achieve first-order sideband transitions by relying on controlled oscillations of the qubit frequency using a flux-bias line. Not only can first-order transitions be significantly faster, but the same technique can be employed to implement other tunable qubit-resonator and qubit-qubit interactions. We discuss in detail how such first-order sideband transitions can be used to implement a high fidelity controlled-NOT operation between two transmons coupled to the same resonator.

15 pages, 5 figures

References in corpus (13)

• Charge insensitive qubit design derived from the Cooper pair box
• Coupling Superconducting Qubits via a Cavity Bus
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Quantum information processing with circuit quantum electrodynamics
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Analytic control methods for high fidelity unitary operations in a weakly nonlinear oscillator
• Low-decoherence flux qubit
• Using Sideband Transitions for Two-Qubit Operations in Superconducting Circuits
• A superconducting qubit with Purcell protection and tunable coupling
• Sideband Transitions and Two-Tone Spectroscopy of a Superconducting Qubit Strongly Coupled to an On-Chip Cavity
• Entanglement of superconducting qubits via microwave fields: classical and quantum regimes
• Optimization of Short Coherent Control Pulses
• Dissipative dynamics of a biased qubit coupled to a harmonic oscillator: Analytical results beyond the rotating wave approximation