Published March 1, 2019 | Version v1
Journal article Metadata-only

Dynamics of Quantum Fisher Information in Homodyne-Mediated Feedback Control

Creators

  • 1. School of Science, Changchun University, Changchun 130022 (China)
  • 2. Key Laboratory of Materials Design and Quantum Simulation, Changchun University, Changchun 130022 (China)
  • 3. Department of Physics, College of Science, Yanbian University, Yanji 133002 (China)

Description

We investigate the quantum Fisher information (QFI) dynamics of a dissipative two-level system in homodyne-mediated quantum feedback control. The analytical results demonstrate that the maximum values and stable values of the QFI can be greatly enhanced via feedback control. The quantum feedback plays a more evident role in the improvement of classical Fisher information. The classical part can reach a high stable value, while the quantum part eventually decays to zero whatever the feedback parameter is. (paper)

Availability note (English)

Available from http://dx.doi.org/10.1088/0256-307X/36/3/030302

Additional details

Identifiers

DOI
10.1088/0256-307X/36/3/030302;

Publishing Information

Journal Title
Chinese Physics Letters
Journal Volume
36
Journal Issue
3
Journal Page Range
[5 p.]
ISSN
0256-307X
CODEN
CPLEEU

INIS

Country of Publication
China
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
52041235
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
FEEDBACK; QUANTUM INFORMATION; QUANTUM SYSTEMS
Descriptors DEC
INFORMATION