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Non-Abelian off-diagonal geometric phases in nano-engineered four-qubit systems
School of Computer Science, Physics and Mathematics, Linnaeus Univ., Sweden.
School of Computer Science, Physics and Mathematics, Linnaeus Univ., Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Theoretical Chemistry. (Quantum information theory)
2013 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 103, no 6, 60011- p.Article in journal (Refereed) Published
Abstract [en]

The concept of off-diagonal geometric phase (GP) has been introduced in order to recover interference information about the geometry of quantal evolution where the standard GPs are not well-defined. In this Letter, we propose a physical setting for realizing non-Abelian off- diagonal GPs. The proposed non-Abelian off-diagonal GPs can be implemented in a cyclic chain of four qubits with controllable nearest-neighbor interactions. Our proposal seems to be within reach in various nano-engineered systems and therefore opens up for first experimental test of the non-Abelian off-diagonal GP. 

Place, publisher, year, edition, pages
2013. Vol. 103, no 6, 60011- p.
Keyword [en]
Geometric phase, spin chains, quantum interferometry
National Category
Condensed Matter Physics
Research subject
Physics; Physics with spec. in Atomic, Molecular and Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-204197DOI: 10.1209/0295-5075/103/60011ISI: 000326280200011OAI: oai:DiVA.org:uu-204197DiVA: diva2:637906
Note

Additional address (ES): Centre for Quantum Technologies, NUS, Singapore

Available from: 2013-07-23 Created: 2013-07-23 Last updated: 2017-12-06Bibliographically approved

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Publisher's full textarxiv:1307.7073

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Sjöqvist, Erik

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