Single-ion quantum lock-in amplifier

Shlomi Kotler (), Nitzan Akerman, Yinnon Glickman, Anna Keselman and Roee Ozeri
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Shlomi Kotler: Weizmann Institute of Science, PO Box 26
Nitzan Akerman: Weizmann Institute of Science, PO Box 26
Yinnon Glickman: Weizmann Institute of Science, PO Box 26
Anna Keselman: Weizmann Institute of Science, PO Box 26
Roee Ozeri: Weizmann Institute of Science, PO Box 26

Nature, 2011, vol. 473, issue 7345, 61-65

Abstract: A quantum lock-in amplifier The 'lock-in' technique is a valuable tool in experimental physics, used to increase measurement sensitivity while reducing susceptibility to noise. A team from the Weizmann Institute in Rehovot, Israel, reports the implementation of a quantum analogue to the classical lock-in amplifier, using a single trapped strontium ion. The system achieves magnetic-field sensitivity two orders of magnitude greater than that seen with established single-spin probe technologies. The quantum lock-in technique is generic and can potentially enhance the sensitivity of any quantum sensor.

Date: 2011
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DOI: 10.1038/nature10010

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