Polarization phase gate with a tripod atomic system

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 {pi}. Such a substantial shift may be observed in a cold atomic gas in a ma...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2004-09, Vol.70 (3), Article 032317
Main Authors: Rebić, S., Vitali, D., Ottaviani, C., Tombesi, P., Artoni, M., Cataliotti, F., Corbalán, R.
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
ENERGY LEVELS
GATING CIRCUITS
KERR EFFECT
MAGNETO-OPTICAL EFFECTS
NONLINEAR OPTICS
NONLINEAR PROBLEMS
PHASE SHIFT
POLARIZATION
RADIATION PRESSURE
TRAPS
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Summary: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 {pi}. 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.
ISSN:1050-2947
1094-1622
DOI:10.1103/PhysRevA.70.032317