Long-range interactions and entanglement of slow single-photon pulses

Journal Article · Sat Oct 15 00:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.043803· OSTI ID:20718795

Friedler, Inbal; Kurizki, Gershon ^[1]; Petrosyan, David ^[2]; Fleischhauer, Michael ^[3]

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1. Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100 (Israel)
2. Institute of Electronic Structure and Laser, FORTH, GR-71110 Heraklion, Crete (Greece)
3. Fachbereich Physik, Universitaet Kaiserslautern, D-67663 Kaiserslautern (Germany)

We show that very large nonlocal nonlinear interactions between pairs of colliding slow-light pulses can be realized in atomic vapors in the regime of electromagnetically induced transparency. These nonlinearities are mediated by strong, long-range dipole-dipole interactions between Rydberg states of the multilevel atoms in a ladder configuration. In contrast to previously studied schemes, this mechanism can yield a homogeneous conditional phase shift of {pi} even for weakly focused single-photon pulses, thereby allowing a deterministic realization of the photonic phase gate.

• OSTI ID: 20718795
• Journal Information: Physical Review. A, Vol. 72, Issue 4; Other Information: DOI: 10.1103/PhysRevA.72.043803; (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
ATOMS
DIPOLES
INTERACTION RANGE
NONLINEAR PROBLEMS
OPACITY
OPTICS
PHASE SHIFT
PHOTONS
PULSES
QUANTUM ENTANGLEMENT
RYDBERG STATES
VAPORS
VISIBLE RADIATION