Published September 2009
| public
Journal Article
Quantum-limited metrology and Bose-Einstein condensates
Abstract
We discuss a quantum-metrology protocol designed to estimate a physical parameter in a Bose-Einstein condensate of N atoms, and we show that the measurement uncertainty can decrease faster than 1/N. The 1/N scaling is usually thought to be the best possible in any measurement scheme. From the perspective of quantum information theory, we outline the main idea that leads to a measurement uncertainty that scales better than 1/N. We examine in detail some potential problems and challenges that arise in implementing such a measurement protocol using a Bose-Einstein condensate. We discuss how some of these issues can be dealt with by using lower-dimensional condensates trapped in nonharmonic potentials.
Additional Information
© 2009 American Physical Society. Received 12 June 2009; published 4 September 2009. This work was supported in part by the U.S. Office of Naval Research under Grant No. N00014-07-1-0304, the Australian Research Council Discovery Project No. DP0343094, and the ARC Centre of Excellence for Quantum-Atom Optics. S.B. was supported by the National Science Foundation under Grant No. PHY-0803371 through the Institute for Quantum Information at the California Institute of Technology. A.D. was supported in part by the EPSRC under Grant No. EP/C546237/1, EPSRC QIP-IRC, EU Integrated Project QAP, and the EU STREP project HIP.Additional details
- Eprint ID
- 16426
- DOI
- 10.1103/PhysRevA.80.032103
- Resolver ID
- CaltechAUTHORS:20091021-112848560
- N00014-07-1-0304
- U. S. Office of Naval Research
- Discovery Project No. DP0343094
- Australian Research Council
- ARC Centre of Excellence for Quantum-Atomic Optics
- PHY-0803371
- NSF
- EP/C546237/1
- Engineering and Physical Sciences Research Council (EPSRC)
- Engineering and Physical Sciences Research Council (EPSRC) QIP-IRC
- EU Integrated Project
- EU STREP project HIP
- Created
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2009-10-21Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field