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Quantum channel-estimation with particle loss: GHZ versus W states

Authors :
Fraïsse, Julien Mathieu Elias
Braun, Daniel
Source :
Quantum Measurements and Quantum Metrology. Volume 3, Issue 1, ISSN (Online) 2299-114X, January 2017
Publication Year :
2016

Abstract

We consider quantum channel-estimation for depolarizing channels and phase-flip channels extended by ancilla qubits and fed with a GHZ or W state. After application of the channel one or several qubits can be lost, and we calculate the impact of the loss on the quantum Fisher information that determines the smallest uncertainty with which the parameters of these channels can be estimated.

Subjects

Subjects :
Quantum Physics

Details

Database :
arXiv
Journal :
Quantum Measurements and Quantum Metrology. Volume 3, Issue 1, ISSN (Online) 2299-114X, January 2017
Publication Type :
Report
Accession number :
edsarx.1608.06221
Document Type :
Working Paper
Full Text :
https://doi.org/10.1515/qmetro-2016-0009