Exploring the effect of noise on the Berry phase

Berger, S., Pechal, M., Abdumalikov, A. A., Eichler, C., Steffen, L., Fedorov, A., Wallraff, A. and Filipp, S. (2013) Exploring the effect of noise on the Berry phase. Physical Review A - Atomic, Molecular, and Optical Physics, 87 6: 060303-1-060303-5. doi:10.1103/PhysRevA.87.060303

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Author Berger, S.
Pechal, M.
Abdumalikov, A. A.
Eichler, C.
Steffen, L.
Fedorov, A.
Wallraff, A.
Filipp, S.
Title Exploring the effect of noise on the Berry phase
Journal name Physical Review A - Atomic, Molecular, and Optical Physics   Check publisher's open access policy
ISSN 1050-2947
1094-1622
Publication date 2013-06-26
Year available 2013
Sub-type Article (original research)
DOI 10.1103/PhysRevA.87.060303
Open Access Status File (Publisher version)
Volume 87
Issue 6
Start page 060303-1
End page 060303-5
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2014
Language eng
Subject 3107 Atomic and Molecular Physics, and Optics
Abstract We experimentally investigate the effects of noise on the adiabatic and cyclic geometric phase, also termed the Berry phase. By introducing artificial fluctuations in the path of the control field, we measure the geometric contribution to dephasing of an effective two-level system for a variety of noise powers and different paths. Our results, measured using a microwave-driven superconducting qubit, clearly show that only fluctuations which distort the path lead to geometric dephasing. In a direct comparison with the dynamic phase, which is path independent, we observe that the Berry phase is less affected by noise-induced dephasing. This observation directly points towards the potential of geometric phases for quantum gates or metrological applications.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2014 Collection
 
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Created: Tue, 01 Apr 2014, 01:01:08 EST by Arkady Fedorov on behalf of School of Mathematics & Physics