2002/09/03 by J. M. Vogels, J. K. Chin, Wolfgang Ketterle +1 · 1 citation
Computer Science · Physics and Astronomy · #Atomic coherence #Bose–Einstein condensate #Coherence (philosophical gambling strategy) #Cold Atom Physics and Bose-Einstein Condensates #Gravitational wave #Interference (communication) #Laser #Mechanical and Optical Resonators #Noise (video) #Parametric statistics #Physics #Quantum #Quantum Information and Cryptography #Quantum decoherence #Quantum interference #Quantum mechanics #Reversing #cond-mat.soft
paper · pdf · doi:10.1103/physrevlett.90.030403
4.2 pages, 4 figures, please take postscript version for best quality of pictures
arxiv created 2002/09/03 · openalex publication_date 2003/01/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the nondegenerate parametric amplifier for matter waves, implemented by colliding two Bose-Einstein condensates. The coherence of the amplified waves is shown by observing high contrast interference with a reference wave and by reversing the amplification process. Since our experiments also place limits on all known sources of decoherence, we infer that relative number squeezing is most likely present between the amplified modes. Finally, we suggest that reversal of the amplification process may be used to detect relative number squeezing without requiring subshot-noise detection.