Dynamics of quantum Fisher information in a squeezed thermal bath

In this paper, the dynamics of quantum Fisher information of a qubit interacting with a squeezed thermal environment are studied. The optimal initial state of the qubit, the temperature of the environment, and the interaction time, which maximize quantum Fisher information are obtained. Based on the...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Author Ullah, Asghar
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 28.02.2021
Subjects
Dynamics
Fisher information
Qubits (quantum computing)
Thermal baths
Thermal environments
Online AccessGet full text

Cover

More Information
Summary:In this paper, the dynamics of quantum Fisher information of a qubit interacting with a squeezed thermal environment are studied. The optimal initial state of the qubit, the temperature of the environment, and the interaction time, which maximize quantum Fisher information are obtained. Based on the ohmicity of the environment, we compare the dynamics of quantum Fisher information in ohmic, sub-ohmic, and super-ohmic regimes of the environment. Moreover, it is shown that the precise estimation of parameters is robust against squeezing.
ISSN:2331-8422