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  Purification of an unpolarized spin ensemble into entangled singlet pairs

Greiner, J., Dasari, D., & Wrachtrup, J. (2017). Purification of an unpolarized spin ensemble into entangled singlet pairs. Scientific Reports, 7: 529.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000E-CFE0-C Version Permalink: https://hdl.handle.net/21.11116/0000-000E-CFE1-B
Genre: Journal Article

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 Creators:
Greiner, J., Author
Dasari, D., Author
Wrachtrup, J.1, Author
Affiliations:
1Max Planck Society, ou_persistent13              

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 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.

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Language(s): eng - English
 Dates: 2017
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 734903
ISI: 000398135000003
 Degree: -

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Title: Scientific Reports
Source Genre: Journal
 Creator(s):
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Publ. Info: LONDON : NATURE PUBLISHING GROUP
Pages: - Volume / Issue: 7 Sequence Number: 529 Start / End Page: - Identifier: ISSN: 2045-2322