Spin-bath narrowing with adaptive parameter estimation
Name
Cappellaro-2012-Spin-bath narrowing with adaptive parameter estimation.pdf
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269.47 KB
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Author(s)
Cappellaro, Paola
Date Issued
March 2012
Journal
Physical Review A
Publisher
American Physical Society
Citation
Cappellaro, Paola. “Spin-bath Narrowing with Adaptive Parameter Estimation.” Physical Review A 85.3 (2012): Web. 26 Apr. 2012. © 2012 American Physical Society
Version
Final published version
Abstract
We present a measurement scheme capable of achieving the quantum limit of parameter estimation using an adaptive strategy that minimizes the parameter's variance at each step. The adaptive rule we propose makes the scheme robust against errors, in particular imperfect readouts, a critical requirement to extend adaptive schemes from quantum optics to solid-state sensors. Thanks to recent advances in single-shot readout capabilities for electronic spins in the solid state (such as nitrogen vacancy centers in diamond), this scheme can also be applied to estimate the polarization of a spin bath coupled to the sensor spin. In turns, the measurement process decreases the entropy of the spin bath resulting in longer coherence times of the sensor spin.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.85.030301
