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Title: An experimental observation of geometric phases for mixed states using NMR interferometry
Authors: Du, Jiangfeng
Zou, Ping
Shi, Mingjun
Kwek, Leong Chuan
Pan, Jian-Wei
Oh, Choo Hiap
Ekert, Artur
Oi, Daniel K. L.
Ericsson, Marie
Issue Date: 2003
Citation: Du, J., Zou, P., Shi, M., Kwek, L. C., Pan, J. -W., Oh, C. H., Ekert, A., ... & Ericsson, M. (2003). An experimental observation of geometric phases for mixed states using NMR interferometry. Physical Review Letters, 91(10), 100403.
Abstract: Examples of geometric phases abound in many areas of physics. They offer both fundamental insights into many physical phenomena and lead to interesting practical implementations. One of them, as indicated recently, might be an inherently fault-tolerant quantum computation. This, however, requires to deal with geometric phases in the presence of noise and interactions between different physical subsystems. Despite the wealth of literature on the subject of geometric phases very little is known about this very important case. Here we report the first experimental study of geometric phases for mixed quantum states. We show how different they are from the well understood, noiseless, pure-state case.
Description: This is the original draft, prior to peer-review, of a manuscript published in Physical Review Letters. The published version is available online at
ISSN: 0031-9007
Other Identifiers: 10.1103/PhysRevLett.91.100403.
Appears in Collections:Journal Articles

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