Deterministic quantum logic with photons via optically induced photonic band gaps

Journal Article · Tue Feb 01 00:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.023803· OSTI ID:20650125

Friedler, Inbal; Kurizki, Gershon; Petrosyan, David ^[1]

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1. Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100 (Israel)

We study the giant Kerr nonlinear interaction between two ultraweak optical fields in which the cross-phase-modulation is not accompanied by spectral broadening of the interacting pulses. This regime is realizable in atomic vapors, when a weak probe pulse, upon propagating through the electromagnetically induced transparency (EIT) medium, interacts with a signal pulse that is dynamically trapped in a photonic band gap created by spatially periodic modulation of its EIT resonance. We find that large conditional phase shifts and entanglement between the signal and probe fields can be obtained with this scheme. The attainable {pi} phase shift, accompanied by negligible absorption and quantum noise, is shown to allow a high-fidelity realization of the controlled-phase universal logic gate between two single-photon pulses.

• OSTI ID: 20650125
• Journal Information: Physical Review. A, Vol. 71, Issue 2; Other Information: DOI: 10.1103/PhysRevA.71.023803; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
KERR EFFECT
LINE BROADENING
MODULATION
NOISE
NONLINEAR PROBLEMS
OPACITY
OPTICS
PERIODICITY
PHASE SHIFT
PHOTONS
PROBES
PULSES
QUANTUM MECHANICS
RESONANCE
SIGNALS
TRAPPING
VAPORS