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Optical and Quantum Electronics
Erschienen in: Optical and Quantum Electronics 2/2020

01.02.2020

Parameter estimation with Dzyaloshinskii–Moriya interaction under external magnetic fields

verfasst von: Fatih Ozaydin, Azmi Ali Altintas

Erschienen in: Optical and Quantum Electronics | Ausgabe 2/2020

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Abstract

We study the effects of external magnetic fields on the precision of parameter estimation with thermal entanglement of two spins in XX model, in the presence of Dzyaloshinskii–Moriya (DM) interaction. Although DM interaction excites but external magnetic fields usually decrease quantum mechanical properties of spin systems such as entanglement, we show by calculating the quantum Fisher information that not only DM interaction D but also homogeneous magnetic field B can increase the precision of parameter estimation, overwhelming the destructive effects of thermalization. We also show that inhomogeneous magnetic field b increases (decreases) the precision of parameter estimation if it is less (greater) than D.
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Metadaten
Titel
Parameter estimation with Dzyaloshinskii–Moriya interaction under external magnetic fields
verfasst von
Fatih Ozaydin
Azmi Ali Altintas
Publikationsdatum
01.02.2020
Verlag
Springer US
Erschienen in
Optical and Quantum Electronics / Ausgabe 2/2020
Print ISSN: 0306-8919
Elektronische ISSN: 1572-817X
DOI
https://doi.org/10.1007/s11082-019-2185-1

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