Squeezed Light and Entangled Images from Four-Wave-Mixing in Hot Rubidium Vapor

Details Squeezed Light and Entangled Images from Four-Wave-Mixing in Hot Rubidium Vapor Squeezed Light and Entangled Images from Four-Wave-Mixing in Hot Rubidium Vapor

2008-11-10

arxiv.org/abs/0811.1243v1

Physics

Quantum Physics

11 pages, 8 figures. SPIE Optics and Photonics 2008 proceeding (San Diego, CA)

Scientific paper

10.1117/12.795474

Entangled multi-spatial-mode fields have interesting applications in quantum information, such as parallel quantum information protocols, quantum computing, and quantum imaging. We study the use of a nondegenerate four-wave mixing process in rubidium vapor at 795 nm to demonstrate generation of quantum-entangled images. Owing to the lack of an optical resonator cavity, the four-wave mixing scheme generates inherently multi-spatial-mode output fields. We have verified the presence of entanglement between the multi-mode beams by analyzing the amplitude difference and the phase sum noise using a dual homodyne detection scheme, measuring more than 4 dB of squeezing in both cases. This paper will discuss the quantum properties of amplifiers based on four-wave-mixing, along with the multi mode properties of such devices.

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