Polarization phase gate with a tripod atomic system

2003/10/31 by S. Rebic, S. Rebić, D. Vitali +9 · 2 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography #Quantum optics and atomic interactions #quant-ph

paper · pdf · doi:10.1103/physreva.70.032317

Corrected version

arxiv created 2004/03/15 · openalex publication_date 2004/09/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04

Abstract

We analyze the nonlinear optical response of a four-level atomic system driven into a tripod configuration. The large cross-Kerr nonlinearities that occur in such a system are shown to produce nonlinear phase shifts of order \ensuremathπ. Such a substantial shift may be observed in a cold atomic gas in a magneto-optical trap where it could be feasibly exploited towards the realization of a polarization quantum phase gate. The experimental feasibility of such a gate is here examined in detail.

Citations

• Measurement of Conditional Phase Shifts for Quantum Logic
• Electromagnetically Induced Transparency

Cited by

• Cross phase modulation in a five–level atomic medium: semiclassical theory
• Slowing the probe field in the second window of double-double electromagnetically induced transparency