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Dynamic Distance Measure on Spaces of Isospectral Mixed Quantum States
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
2013 (English)In: Entropy, ISSN 1099-4300, E-ISSN 1099-4300, Vol. 15, no 9, 3688-3697 p.Article in journal (Refereed) Published
Abstract [en]

Distance measures are used to quantify the extent to which information is preserved or altered by quantum processes, and thus are indispensable tools in quantum information and quantum computing. In this paper we propose a new distance measure for mixed quantum states, which we call the dynamic distance measure, and we show that it is a proper distance measure. The dynamic distance measure is defined in terms of a measurable quantity, which makes it suitable for applications. In a final section we compare the dynamic distance measure with the well-known Bures distance measure.

Place, publisher, year, edition, pages
2013. Vol. 15, no 9, 3688-3697 p.
Keyword [en]
distance measure, mixed state, quantum dynamics, quantum information
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-99907DOI: 10.3390/e15093688ISI: 000328463000019OAI: oai:DiVA.org:su-99907DiVA: diva2:690306
Funder
Swedish Research Council
Note

AuthorCount:2;

Available from: 2014-01-23 Created: 2014-01-20 Last updated: 2017-12-06Bibliographically approved

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