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Trapped Ion Quantum Computing

Purification of an unpolarized spin ensemble into entangled singlet pairs

arXiv
Authors: Johannes N. Greiner, D. D. Bhaktavatsala Rao, Jörg Wrachtrup

Year

2016

Paper ID

42700

Status

Preprint

Abstract Read

~2 min

Abstract Words

116

Citations

N/A

Abstract

Dynamical polarization of nuclear spin ensembles is of central importance for magnetic resonance studies, precision sensing and for applications in quantum information theory. Here we propose a scheme to generate long-lived singlet pairs in an unpolarized nuclear spin ensemble which is dipolar coupled to the electron spins of a Nitrogen Vacancy center in diamond. The quantum mechanical back-action induced by frequent spin-selective readout of the NV centers allows the nuclear spins to pair up into maximally entangled singlet pairs. Counterintuitively, the robustness of the pair formation to dephasing noise improves with increasing size of the spin ensemble. We also show how the paired nuclear spin state allows for enhanced sensing capabilities of NV centers in diamond.

Why This Paper Matters

  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2016 reference point for readers tracking recent quantum research.
  • Dynamical polarization of nuclear spin ensembles is of central importance for magnetic resonance studies, precision sensing and for applications in quantum information theory.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1610.08886 [2] arXiv https://arxiv.org/abs/1610.08886 [3] Publisher https://arxiv.org/abs/1610.08886

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