Parameter estimation with Dzyaloshinskii–Moriya interaction under external magnetic fields

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Tarih

2020-02-01

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Yayıncı

Springer

Erişim Hakkı

info:eu-repo/semantics/closedAccess

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Özet

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. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

Açıklama

The authors greatly acknowledge the financial support of Isik University Scientific Research Fund, Grant No. BAP-15B103

Anahtar Kelimeler

Dzyaloshinskii–Moriya interaction, External magnetic field, Fisher information, Fisher information matrix, Homogeneous magnetic field, Information QFI, Inhomogeneous magnetic field, Magnetic field effects, Metrology, Parameter estimation, Precision of parameters, Quantum entanglement, Quantum fisher information, Spin chain, Spin chains, Spin dynamics, Thermal entanglement, Under external magnetic field, XX model

Kaynak

Optical and Quantum Electronics

WoS Q Değeri

Q2
Q2

Scopus Q Değeri

Q2

Cilt

52

Sayı

2

Künye

Özaydın, F. & Altıntaş, A. A. (2020). Parameter estimation with Dzyaloshinskii–Moriya interaction under external magnetic fields. Optical and Quantum Electronics, 52(2), 1-10. doi:10.1007/s11082-019-2185-1