Physics – Quantum Physics
Scientific paper
2011-01-25
Nature Volume: 473, Pages: 61-65, 05 May 2011
Physics
Quantum Physics
4 figures, Supplementary Information available soon on http://www.weizmann.ac.il/complex/ozeri/2010
Scientific paper
10.1038/nature10010
We report on the implementation of a quantum analog to the classical lock-in amplifier. All the lock-in operations: modulation, detection and mixing, are performed via the application of non-commuting quantum operators on the electronic spin state of a single trapped Sr+ ion. We significantly increase its sensitivity to external fields while extending phase coherence by three orders of magnitude, to more than one second. With this technique we measure magnetic fields with sensitivity of 25 pT/sqrt(Hz) and light shifts with an uncertainty below 140 mHz after 1320 seconds of averaging. These sensitivities are limited by quantum projection noise and, to our knowledge, are more than two orders of magnitude better than with other single-spin probe technologies. In fact, our reported sensitivity is sufficient for the measurement of parity non-conservation, as well as the detection of the magnetic field of a single electronic-spin one micrometer from an ion-detector with nanometer resolution. As a first application we perform light shift spectroscopy of a narrow optical quadruple transition. Finally, we emphasize that the quantum lock-in technique is generic and can potentially enhance the sensitivity of any quantum sensor.
Akerman Nitzan
Glickman Yinnon
Keselman Anna
Kotler Shlomi
Ozeri Roee
No associations
LandOfFree
Single Ion Quantum Lock-In Amplifier does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Single Ion Quantum Lock-In Amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single Ion Quantum Lock-In Amplifier will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-543630