Quantum Phase Gate Operation Based on Nonlinear Optics: Full Quantum Analysis

Abstract

We present a full quantum treatment of a five-level atomic system coupled to two quantum and two classical light fields. The two quantum fields undergo a cross-phase modulation induced by electro-magnetically induced transparency. The performance of this configuration as a two-qubit quantum phase gate for travelling single-photons is examined. A trade-off between the size of the conditional phase shift and the fidelity of the gate is found. Nonetheless, a satisfactory gate performance is still found to be possible in the transient regime, corresponding to a fast gate operation.

4 pages, 3 figures

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Cited by in corpus (15)

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• Continuous-time cross-phase modulation and quantum computation
• Double-double electromagnetically induced transparency with amplification
• Cross phase modulation in a five--level atomic medium: Semiclassical theory
• Preparation and Determination of Spin-Polarized States in Multi-Zeeman-sublevel Atoms
• Subcarrier wave continuous variable quantum key distribution with discrete modulation: mathematical model and finite-key analysis
• Fundamental modes of a trapped probe photon in optical fibers conveying periodic pulse trains
• Quantum interference and control of the optical response in quantum dot molecules
• Quantum phase gate for optical qubits with cavity quantum optomechanics
• Assessment of a quantum phase gate operation based on nonlinear optics
• Pulse propagation, population transfer and light storage in five-level media
• Cavity-induced giant Kerr nonlinearities in a driven V-type atom
• Theoretical Simulation of 87Rb Absorption Spectrum in a Thermal Cell
• Tunable photon-assisted bleaching of three-level systems for noise filtration
• Quantum effects in the interaction of off-resonant coherent light with a single atom