Strong Quantum Spin Correlations Observed in Atomic Spin Mixing

Details Strong Quantum Spin Correlations Observed in Atomic Spin Mixing Strong Quantum Spin Correlations Observed in Atomic Spin Mixing

2011-09-10

arxiv.org/abs/1109.2185v1

Physics

Condensed Matter

Quantum Gases

5 pages, 4 figures

Scientific paper

We have observed sub-Poissonian spin correlations generated by collisionally induced spin mixing in a spin-1 Bose-Einstein condensate. We measure a quantum noise reduction of -7 dB (-10 dB corrected for detection noise) below the standard quantum limit (SQL) for the corresponding coherent spin states. The spin fluctuations are detected as atom number differences in the spin states using fluorescent imaging that achieves a detection noise floor of 8 atoms per spin component for a probe time of 100 $\mu$s.

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