Quantal interferometry with dissipative internal motion
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
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.
Research subject Physics
IdentifiersURN: urn:nbn:se:uu:diva-73202DOI: 10.1103/PhysRevA.70.052109ISI: 000225479000023OAI: oai:DiVA.org:uu-73202DiVA: diva2:101113
Also in Virtual Journal of Quantum Information, December issue 2004.2007-02-062007-02-062011-10-06