Fast geometric gate operation of superconducting charge qubits in circuit QED

TL;DR

This paper proposes a fast, scalable method for implementing geometric quantum gates with superconducting charge qubits in circuit QED, leveraging a transmission line resonator to enhance coherence and operational speed.

Contribution

It introduces a novel coupling scheme for superconducting charge qubits that achieves fast, noise-immune gate operations and scalability in circuit QED systems.

Findings

The scheme enables rapid gate operations.

Operation is insensitive to initial resonator states.

System is scalable to multiple qubits.

Abstract

A scheme for coupling superconducting charge qubits via a one-dimensional superconducting transmission line resonator is proposed. The qubits are working at their optimal points, where they are immune to the charge noise and possess long decoherence time. Analysis on the dynamical time evolution of the interaction is presented, which is shown to be insensitive to the initial state of the resonator field. This scheme enables fast gate operation and is readily scalable to multiqubit scenario.