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Rapid and Robust Spin State Amplification

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Date
22/04/2011
Author
Close, Tom
Fadugba, Femi
Benjamin, Simon C.
Fitzsimons, Joseph
Lovett, Brendon W.
Keywords
Single-shot readout
Electron-spin
Quantum-dot
QC Physics
Metadata
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Abstract
Electron and nuclear spins have been employed in many of the early demonstrations of quantum technology. However, applications in real world quantum technology are limited by the difficulty of measuring single spins. Here we show that it is possible to rapidly and robustly amplify a spin state using a lattice of ancillary spins. The model we employ corresponds to an extremely simple experimental system: a homogenous Ising-coupled spin lattice in one, two, or three dimensions, driven by a continuous microwave field. We establish that the process can operate at finite temperature (imperfect initial polarization) and under the effects of various forms of decoherence.
Citation
Close , T , Fadugba , F , Benjamin , S C , Fitzsimons , J & Lovett , B W 2011 , ' Rapid and Robust Spin State Amplification ' , Physical Review Letters , vol. 106 , no. 16 , 167204 . https://doi.org/10.1103/PhysRevLett.106.167204
Publication
Physical Review Letters
Status
Peer reviewed
DOI
https://doi.org/10.1103/PhysRevLett.106.167204
ISSN
0031-9007
Type
Journal article
Rights
© 2011. American Physical Society.
Description
This work was supported by the EPSRC, the National Research Foundation and Ministry of Education, Singapore, and the Royal Society.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5204

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