Quantum Algorithmic Readout in Multi-Ion Clocks

Schulte, M. and L`orch, N. and Leroux, I. D. and Schmidt, P. O. and Hammerer, K.. (2016) Quantum Algorithmic Readout in Multi-Ion Clocks. Physical Review Letters, 116 (1). 013002.

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Official URL: http://edoc.unibas.ch/52054/

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Optical clocks based on ensembles of trapped ions promise record frequency accuracy with good short-term stability. Most suitable ion species lack closed transitions, so the clock signal must be read out indirectly by transferring the quantum state of the clock ions to cotrapped logic ions of a different species. Existing methods of quantum logic readout require a linear overhead in either time or the number of logic ions. Here we describe a quantum algorithmic readout whose overhead scales logarithmically with the number of clock ions in both of these respects. The scheme allows a quantum nondemolition readout of the number of excited clock ions using a single multispecies gate operation which can also be used in other areas of ion trap technology such as quantum information processing, quantum simulations, metrology, and precision spectroscopy.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Lörch, Niels
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:13 Feb 2017 16:28
Deposited On:13 Feb 2017 16:28

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