| Issue |
Europhys. Lett.
Volume 73, Number 4, February 2006
|
|
|---|---|---|
| Page(s) | 499 - 505 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i2005-10435-1 | |
| Published online | 11 January 2006 | |
Test of the quantumness of atom-atom correlations in a bosonic gas
1
Laser Research Institute, St. Petersburg State University 5 Uliyanovskaya, Petrodvoretz, St. Petersburg, Russia
2
Facultad de Física, Pontificia Universidad Católica de Chile Casilla 306, Santiago 22, Chile
Received:
30
September
2005
Accepted:
21
December
2005
It is shown how the quantumness of atom-atom correlations in a trapped bosonic gas can be made observable. Application of continuous feedback control of the center of mass of the atomic cloud is shown to generate oscillations of the spatial extension of the cloud, whose amplitude can be directly used as a characterization of atom-atom correlations. Feedback parameters can be chosen such that the violation of a Schwarz inequality for atom-atom correlations can be tested at noise levels much higher than the standard quantum limit.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 05.30.-d – Quantum statistical mechanics / 05.30.Jp – Boson systems
© EDP Sciences, 2006
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