Generalized switchable coupling for superconducting qubits using double resonance

Abstract

We propose a method for switchable coupling between superconducting qubits using double resonance. The inter-qubit coupling is achieved by applying near-resonant oscillating fields to the two qubits. The deviation from resonance relaxes the criterion of strong driving fields while still allowing for a fully entangling two-qubit gate. This method avoids some of the shortcomings of previous proposals for switchable coupling. We discuss the possible application of our proposal to a pair of inductively coupled flux qubits, and we consider the extension to phase qubits.

7 pages, 4 figures

References in corpus (4)

• Superconducting Circuits and Quantum Information
• Spectroscopy on two coupled flux qubits
• Parametric coupling for superconducting qubits
• Tunable coupling scheme for flux qubits at the optimal point

Cited by in corpus (9)

• Entanglement of superconducting qubits via microwave fields: classical and quantum regimes
• Interqubit coupling mediated by a high-excitation-energy quantum object
• Coupling superconducting flux qubits at optimal point via dynamic decoupling with the quantum bus
• Protecting entanglement in superconducting qubits
• Spectroscopy of superconducting charge qubits coupled by a Josephson inductance
• Switchable coupling for superconducting qubits using double resonance in the presence of crosstalk
• Variable-frequency-controlled coupling in charge qubit circuits: Effects of microwave field on qubit-state readout
• Switchable coupling between charge and flux qubits
• Pseudo-Rabi oscillations in superconducting flux qubits in the classical regime