Rapid and robust spin state amplification

Details Rapid and robust spin state amplification Rapid and robust spin state amplification

2010-11-04

arxiv.org/abs/1011.1217v3

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.106.167204

Electron and nuclear spins have been employed in many of the early demonstrations of quantum technology (QT). However applications in real world QT 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 polarisation) and under the effects of various forms of decoherence.

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