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

Abstract

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.

8 pages, 5 figures

References in corpus (5)

• Perfect Transfer of Arbitrary States in Quantum Spin Networks
• Characterizing the entanglement of symmetric many-particle spin-1/2 systems
• Coherence and control of quantum registers based on electronic spin in a nuclear spin bath
• A Stochastic Liouville Equation Approach for the Effect of Noise in Quantum Computations
• Control-limited perfect state transfer, quantum stochastic resonance and many-body entangling gate in imperfect qubit registers