Quantum correlation in disordered spin systems: entanglement and applications to magnetic sensing

Details Quantum correlation in disordered spin systems: entanglement and applications to magnetic sensing Quantum correlation in disordered spin systems: entanglement and applications to magnetic sensing

2009-04-17

arxiv.org/abs/0904.2642v1

Phys. Rev. A 80, 032311 (2009)

Physics

Quantum Physics

8 pages, 5 figures

Scientific paper

10.1103/PhysRevA.80.032311

We propose a strategy to generate a many-body entangled state in a collection of randomly placed, dipolarly coupled electronic spins in the solid state. By using coherent control to restrict the evolution into a suitable collective subspace, this method enables the preparation of GHZ-like and spin-squeezed states even for randomly positioned spins, while in addition protecting the entangled states against decoherence. We consider the application of this squeezing method to improve the sensitivity of nanoscale magnetometer based on Nitrogen-Vacancy spin qubits in diamond.

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