Compact source of Einstein-Podolsky-Rosen entanglement and squeezing at very low noise frequencies

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.042315· OSTI ID:20646351

Laurat, J; Keller, G; Treps, N; Fabre, C ^[1]; Coudreau, T ^[1]

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1. Laboratoire Kastler Brossel, UPMC, Case 74, 4 place Jussieu, 75252 Paris Cedex 05 (France)

We report on the experimental demonstration of strong quadrature Einstein-Podolsky-Rosen entanglement and squeezing at very low noise sideband frequencies produced by a single type-II, self-phase-locked, frequency degenerate optical parametric oscillator below threshold. The generated two-mode squeezed vacuum state is preserved for noise frequencies as low as 50 kHz. Designing simple setups able to generate nonclassical states of light in the kHz regime is a key challenge for high sensitivity detection of ultraweak physical effects such as gravitational wave or small beam displacement.

• OSTI ID: 20646351
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CORRELATIONS
DETECTION
ELECTRON SPIN RESONANCE
ENERGY LEVELS
GRAVITATIONAL WAVES
KHZ RANGE
NOISE
PARAMETRIC OSCILLATORS
QUADRATURES
QUANTUM MECHANICS
SENSITIVITY
VACUUM STATES
VISIBLE RADIATION