Sequential quantum-enhanced measurement with an atomic ensemble

Lebedev, A. V. and Treutlein, Philipp and Blatter, Gianni. (2014) Sequential quantum-enhanced measurement with an atomic ensemble. Physical review. A, Atomic, Molecular, and Optical Physics, 89 (1). 012118.

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Official URL: http://edoc.unibas.ch/dok/A6337753

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We propose a quantum-enhanced iterative (with K steps) measurement scheme based on an ensemble of N two-level probes which asymptotically approaches the Heisenberg limit δK∝R−K/(K+1), where R is the number of quantum resources. The protocol is inspired by Kitaev's phase estimation algorithm and involves only collective manipulation and measurement of the ensemble. The iterative procedure takes the shot-noise-limited primary measurement with precision δ1∝N−1/2 to increasingly precise results, δK∝N−K/2. We propose an implementation of the algorithm for the measurement of a magnetic field using a two-component atomic cloud of bosons.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentelle Nanophysik (Treutlein)
UniBasel Contributors:Treutlein, Philipp
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Institute of Physics
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:28 Apr 2018 14:32
Deposited On:06 Feb 2015 09:59

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