Work

Natural Metric for Quantum Information Theory

Year: 2009

Type: article

Abstract: We study in detail a very natural metric for quantum states. This new proposal has two basic ingredients: entropy and purification. The metric for two mixed states is defined as the square root of the entropy of the average of representative purifications of those states. Some basic properties are analyzed and its relation to other distances is investigated. As an illustrative application, the proposed metric is evaluated for one-qubit mixed states.

Source: International Journal of Quantum Information

DOI: 10.1142/s0219749909005584

Authors: P. W. LAMBERTI, M. PORTESI, J. SPARACINO

Institutions: Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Córdoba, Instituto de Física La Plata, Universidad Nacional de La Plata

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Consejo Nacional de Investigaciones Científicas y Técnicas

OpenAlex ID: W2096428436

FWCI: 0.832

Cites: 27

Cited by: 17

Related to: 10