Polarization qubit phase gate in driven atomic media

Abstract

We present here an all--optical scheme for the experimental realization of a quantum phase gate. It is based on the polarization degree of freedom of two travelling single photon wave-packets and exploits giant Kerr nonlinearities that can be attained in coherently driven ultracold atomic media.

4 pages, 1 figure, in press on PRL

References in corpus (9)

• Quantum Cryptography
• Experimental quantum teleportation
• Experimental Realization of Teleporting an Unknown Pure Quantum State via Dual Classical and Einstein-Podolski-Rosen Channels
• Measurement of conditional phase shifts for quantum logic
• Ultra-Slow Light and Enhanced Nonlinear Optical Effects in a Coherently Driven Hot Atomic Gas
• Nonlinear Optics and Quantum Entanglement of Ultra-Slow Single Photons
• Complete quantum teleportation with a Kerr nonlinearity
• Symmetric photon-photon coupling by atoms with Zeeman-split sublevels
• A conditional-phase switch at the single-photon level

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• Cavity electromagnetically induced transparency and all-optical switching using ion Coulomb crystals
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• Cavity QED quantum phase gates for a single longitudinal mode of the intracavity field
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• All-cavity electromagnetically induced transparency and optical switching: semiclassical theory
• Towards deterministic optical quantum computation with coherently driven atomic ensembles
• Effective cross-Kerr nonlinearity and robust phase gates with trapped ions
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• Observation of EIT-enhanced cross-phase modulation in the short-pulse regime
• Quantum Coherence Effects in Four-level Diamond Atomic System
• Electromagnetically Induced Transparency of Interacting Rydberg Atoms with Two-Body dephasing
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• Weak-Light, Zero to -πLossless Kerr-Phase Gate in Quantum-well System via Tunneling Interference Effect
• Review of recent experimental progresses in Foundations of Quantum Mechanics and Quantum Information obtained in Parametric Down Conversion Experiments at IENGF
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• Cross-Phase Modulation and Population Redistribution in a Periodic Tripod Medium
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• An ideal experiment to determine the 'past of a particle' in the nested Mach-Zehnder Interferometer