Rapid and Robust Spin State Amplification

Tom Close*, Femi Fadugba, Simon C. Benjamin, Joseph Fitzsimons, Brendon W. Lovett

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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.

Original languageEnglish
Article number167204
Number of pages4
JournalPhysical Review Letters
Issue number16
Publication statusPublished - 22 Apr 2011


  • Single-shot readout
  • Electron-spin
  • Quantum-dot


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