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Quantal interferometry with dissipative internal motion
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical Chemistry, Quantum Chemistry.
2004 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 70, no 5, 052109- p.Article in journal (Refereed) Published
Abstract [en]

In the presence of dissipation, quantal states may acquire complex-valued phase effects. We suggest a notion of dissipative interferometry that accommodates this complex-valued structure and that may serve as a tool for analyzing the effect of certain kinds of external influences on quantal interference. The concept of mixed state phase and concomitant gauge invariance is extended to dissipative internal motion. The resulting complex-valued mixed state interference effects lead to well-known results in the unitary limit and in the case of dissipative motion of pure quantal states. Dissipative interferometry is applied to fault-tolerant geometric quantum computation.

Place, publisher, year, edition, pages
2004. Vol. 70, no 5, 052109- p.
National Category
Physical Sciences
Research subject
Physics
Identifiers
URN: urn:nbn:se:uu:diva-73202DOI: 10.1103/PhysRevA.70.052109ISI: 000225479000023OAI: oai:DiVA.org:uu-73202DiVA: diva2:101113
Note
Also in Virtual Journal of Quantum Information, December issue 2004.Available from: 2007-02-06 Created: 2007-02-06 Last updated: 2017-12-14

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Sjöqvist, Erik

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