2003/05/09 by Jiangfeng Du, Ping Zou, Mingjun Shi +8 · 5 citations
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Quantum and electron transport phenomena #Spectroscopy and Quantum Chemical Studies #quant-ph
paper · pdf · doi:10.1103/physrevlett.91.100403
published as Phys. Rev. Lett. 91, 100403 (2003) · 4 pages, 3 figures
arxiv created 2003/05/09 · openalex publication_date 2003/09/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 one 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.