This article has an erratum: [https://doi.org/10.1209/0295-5075/109/59901]
Volume 109, Number 4, February 2015
|Number of page(s)||5|
|Published online||24 February 2015|
A measure for maximum similarity between outcome states
1 Departamento de Física, Universidad de Concepción - Casilla 160 - C, Concepción, Chile
2 Departamento de Física, Universidad de Guadalajara - Av. Revolución 1500, 44420 Guadalajara, Jalisco, Mexico
3 Department of Physics and NIST, University of Maryland - College Park, MD 20742, USA
Received: 3 November 2014
Accepted: 3 February 2015
We propose a measure to quantify correlations in a bipartite quantum system of two quibits by assessing the minimum difference between outcome states of a subsystem by performing a local measurement on the other subsystem. This maximum similarity measure is a monotone function of the concurrence for pure states of two qubits; for mixed states it accounts for entanglement, dissonance, and classical correlations. Besides, we found a closed formula for evaluating the similarity degree of an arbitrary mix state of two two-dimensional systems.
PACS: 03.65.-w – Quantum mechanics / 03.65.Aa – Quantum systems with finite Hilbert space / 03.67.-a – Quantum information
© EPLA, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.