Implementation of a two-qubit controlled-U gate based on unconventional geometric phase with a constant gating time

TL;DR

This paper presents a novel method for implementing a two-qubit controlled-U gate in a hybrid atom-coupled cavities array system, achieving constant gating time and adjustable transformations, which could enhance quantum networking and scalable quantum computing.

Contribution

The paper introduces an alternative scheme utilizing unconventional geometric phases for a two-qubit controlled-U gate with fixed gating time and tunable operations.

Findings

Achieves constant gating time for the two-qubit controlled-U gate.

Allows adjustable transformations on the target qubit via tunable coupling.

Potential applications in quantum networking and scalable quantum computation.

Abstract

We propose an alternative scheme to implement a two-qubits Controlled-U gate in the hybrid system atom-$CCA$ (coupled cavities array). Our scheme results in a constant gating time and, with an adjustable qubit-bus coupling (atom-resonator), one can specify a particular transformation $U$ on the target qubit. We believe that this proposal may open promising perspectives for networking quantum information processors and implementing distributed and scalable quantum computation.