Quantum phase-gate operation based on nonlinear optics: Full quantum analysis

2005/07/31 by Carlo Ottaviani, C. Ottaviani, S. Rebić +4 · 2 citations
Computer Science · Physics and Astronomy · #Atomic and Subatomic Physics Research #Quantum Information and Cryptography #Quantum optics and atomic interactions #quant-ph

paper · pdf · doi:10.1103/physreva.73.010301

published as Phys. Rev. A 73, 010301(R) (2006) · 4 pages, 3 figures

openalex publication_date 2006/01/03 · arxiv created 2006/01/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 electromagnetically induced transparency. The performance of this configuration as a two-qubit quantum phase gate for traveling 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.

Citations

• Complete Characterization of a Quantum Process: The Two-Bit Quantum Gate
• Measurement of Conditional Phase Shifts for Quantum Logic
• Magneto-optical rotation and cross-phase modulation via coherently driven four-level atoms in a tripod configuration
• Towards deterministic optical quantum computation with coherently driven atomic ensembles
• Electromagnetically induced transparency: Optics in coherent media
• Electromagnetically Induced Transparency

Cited by

• Cross phase modulation in a five–level atomic medium: semiclassical theory
• Quantum phase gate for optical qubits with cavity quantum optomechanics