Rapid and robust spin state amplification

Abstract

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.

5 pages, 2 figures

References in corpus (7)

• Spins in few-electron quantum dots
• Quantum Computation and Decision Trees
• Single-shot readout of an electron spin in silicon
• Hybrid solid state qubits: the powerful role of electron spins
• Single spin measurement using cellular automata techniques
• Stimulated wave of polarization in 1D Ising chain
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Cited by in corpus (8)

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• Hybrid quantum magnetic field sensor with an electron spin and a nuclear spin in diamond
• On the Schmidt-rank-three bipartite and multipartite unitary operator
• Entanglement-enhanced sensing using a chain of qubits with always-on nearest-neighbor interactions
• Spin Amplification with Inhomogeneous Broadening
• Spin amplification in realistic systems