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

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.

4 pages, 1 figure, APS format, an extended version is in progress with some improvements

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