Generation of pulsed bipartite entanglement using four-wave mixing

Abstract

Using four-wave mixing in a hot atomic vapor, we generate a pair of entangled twin beams in the microsecond pulsed regime near the D1 line of ${}^{85}$Rb, making it compatible with commonly used quantum memory techniques. The beams are generated in the bright and vacuum-squeezed regimes, requiring two separate methods of analysis, without and with local oscillators, respectively. We report a noise reduction of up to $3.8\pm 0.2$ dB below the standard quantum limit in the pulsed regime and a level of entanglement that violates an Einstein--Podolsky--Rosen inequality.

10 pages, 5 figures, accepted for publication in New Journal Of Physicis

References in corpus (7)

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Cited by in corpus (11)

• Gradient echo memory in an ultra-high optical depth cold atomic ensemble
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• Rotation of the noise ellipse for squeezed vacuum light generated via four-wave-mixing
• Interferences between Bogoliubov excitations and their impact on the evidence of superfluidity in a paraxial fluid of light
• Advanced Quantum Noise
• Compensation of Beer-Lambert attenuation using non-diffracting Bessel beams
• Does entanglement enhance single-molecule pulsed biphoton spectroscopy?
• Generating strong anti-bunching by interfering with coherent states
• Lower order and higher order entanglement in $87Rb$ $5S-5P-5D$ hyperfine manifold modeled as a four-wave mixing process
• Nonlocal phase modulation of multimode, continuous-variable twin beams
• Paraxial fluids of light