Sharp transitions in low-number quantum dots Bayesian magnetometry

Paweł Mazurek; Michał Horodecki; Łukasz Czekaj; Paweł Horodecki

doi:10.1038/srep34327

Sharp transitions in low-number quantum dots Bayesian magnetometry

Abstract

We consider Bayesian estimate of static magnetic field, characterized by a prior Gaussian probability distribution, in systems of a few electron quantum dot spins interacting with infinite temperature spin environment via hyperfine interaction. Sudden transitions among optimal states and measurements are observed. Usefulness of measuring occupation levels is shown for all times of the evolution, together with the role of entanglement in the optimal scenario. For low values of magnetic field, memory effects stemming from the interaction with environment provide limited metrological advantage.

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Authors (4)

Paweł Mazurek
- Uniwersytet Gdański Krajowe Centrum Informatyki Kwantowej
Michał Horodecki
- Uniwersytet Gdański Krajowe Centrum Informatyki Kwantowej
Łukasz Czekaj dr inż.
- Uniwersytet Gdański Krajowe Centrum Informatyki Kwantowej
Paweł Horodecki prof. dr hab.

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: Scientific Reports no. 6, pages 34327 - 3433,
ISSN: 2045-2322
Language:: English
Publication year:: 2016
Bibliographic description:: Mazurek P., Horodecki M., Czekaj Ł., Horodecki P.: Sharp transitions in low-number quantum dots Bayesian magnetometry// Scientific Reports. -Vol. 6, (2016), s.34327-3433
DOI:: Digital Object Identifier (open in new tab) 10.1038/srep34327
Verified by:: Gdańsk University of Technology