Rapid and Robust Spin State Amplification
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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.
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 . DOI: 10.1103/PhysRevLett.106.167204
Physical Review Letters
© 2011. American Physical Society.
This work was supported by the EPSRC, the National Research Foundation and Ministry of Education, Singapore, and the Royal Society.
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