Next Article in Journal
Time-Dependent Probabilistic Model for Hierarchical Structure in Failure Mode and Effect Analysis
Previous Article in Journal
Development of an ANN-Based Lumped Plasticity Model of RC Columns Using Historical Pseudo-Static Cyclic Test Data
Previous Article in Special Issue
Quantum-Key-Distribution (QKD) Networks Enabled by Software-Defined Networks (SDN)
Open AccessArticle

Optimal Estimation of Parameters Encoded in Quantum Coherent State Quadratures

Centre for Quantum Information and Communication, Ecole polytechnique de Bruxelles, Université libre de Bruxelles, 1050 Brussels, Belgium
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(20), 4264; https://doi.org/10.3390/app9204264
Received: 4 July 2019 / Revised: 18 September 2019 / Accepted: 19 September 2019 / Published: 11 October 2019
(This article belongs to the Special Issue Quantum Optics for Fundamental Quantum Mechanics)
In the context of multiparameter quantum estimation theory, we investigate the construction of linear schemes in order to infer two classical parameters that are encoded in the quadratures of two quantum coherent states. The optimality of the scheme built on two phase-conjugate coherent states is proven with the saturation of the quantum Cramér–Rao bound under some global energy constraint. In a more general setting, we consider and analyze a variety of n-mode schemes that can be used to encode n classical parameters into n quantum coherent states and then estimate all parameters optimally and simultaneously. View Full-Text
Keywords: quantum estimation theory; quantum Cramér–Rao bound; quantum Fisher information; quantum optics; quantum coherent states; phase conjugation quantum estimation theory; quantum Cramér–Rao bound; quantum Fisher information; quantum optics; quantum coherent states; phase conjugation
Show Figures

Figure 1

MDPI and ACS Style

Arnhem, M.; Karpov, E.; Cerf, N.J. Optimal Estimation of Parameters Encoded in Quantum Coherent State Quadratures. Appl. Sci. 2019, 9, 4264.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop