Atomic-resonance-enhanced nonlinear optical frequency conversion with entangled photon pairs

Journal Article · Tue Mar 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.033807· OSTI ID:21541364

Shengwang, Du ^[1]

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1. Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon (Hong Kong)

We theoretically study nonlinear optical frequency conversion with time-frequency entangled paired photons whose sum frequency is on two-photon resonance of an atomic ensemble. Assisted by a strong coupling laser, two paired photons with wide spectrum are converted into a single monochromatic photon. The on-resonance nonlinear process is made possible due to the electromagnetically induced transparency that not only eliminates the on-resonance absorption but also enhances the nonlinear interaction between the single photons and atoms. Compared to this quantum-nonlinear conversion, the classical corresponding single-photon counts from accidental two-photon coincidence has a wide spectrum and experiences large absorption. As a result, the system can be used as an efficient two-photon quantum correlator in which the classical accidental coincidences can be suppressed. We perform numerical simulations basing on a Rb atomic vapor cell with realistic operating parameters.

• OSTI ID: 21541364
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ALKALI METALS
BOSONS
COINCIDENCE METHODS
COMPUTERIZED SIMULATION
COUNTING TECHNIQUES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
FREQUENCY DEPENDENCE
INTERACTIONS
MANY-BODY PROBLEM
MASSLESS PARTICLES
MATHEMATICAL MODELS
METALS
MONOCHROMATIC RADIATION
NONLINEAR PROBLEMS
OPACITY
OPTICAL PROPERTIES
PAIR PRODUCTION
PARTICLE MODELS
PARTICLE PRODUCTION
PHOTONS
PHYSICAL PROPERTIES
QUANTUM ENTANGLEMENT
RADIATIONS
RESONANCE
RESONANCE ABSORPTION
RUBIDIUM
SIMULATION
SORPTION
STRONG-COUPLING MODEL
TWO-BODY PROBLEM