Hyper-parallel Toffoli gate on three-photon system with two degrees of freedom assisted by single-sided optical microcavities

2016/10/08 by Hai-Rui Wei, Fu-Guo Deng, Gui Lu Long · 1 citation
Physics and Astronomy · #quant-ph

paper · pdf · doi:10.1364/oe.24.018619

published as Optics Express 24(16): 18619 (2016) · 13 page, 3 figures

arxiv created 2016/10/08 · arxiv updated 2016/10/19

Abstract

Encoding qubits in multiple degrees of freedom (DOFs) of a quantum system allows less-decoherence quantum information processing with much less quantum resources. We present a compact and scalable quantum circuit to determinately implement a hyper-parallel controlled-controlled-phase-flip (hyper-\rmC²PF) gate on a three-photon system in both the polarization and spatial DOFs. In contrast with the one with many qubits encoding in one DOF only, our hyper-\rmC²PF gate operating two independent \rmC²PF gates on a three-photon system with less decoherence, and reduces the quantum resources required in quantum information processing by a half. Additional photons, necessary for many approaches, are not required in the present scheme. Our calculation shows that this hyper-\rmC²PF gate is feasible in experiment.

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