Observation of Berry's Phase in a Solid-State Qubit
| Autor: | Andreas Wallraff, Jay M. Gambetta, Alexandre Blais, Peter Leek, M. Göppl, David Schuster, Johannes M. Fink, Luigi Frunzio, R. Bianchetti, Robert Schoelkopf |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Quantum Physics Flux qubit Multidisciplinary Condensed Matter - Mesoscale and Nanoscale Physics Field (physics) Condensed Matter - Superconductivity Dephasing Phase (waves) FOS: Physical sciences 01 natural sciences 010305 fluids & plasmas 3. Good health Superconductivity (cond-mat.supr-con) Phase qubit Geometric phase Qubit Quantum mechanics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Quantum Physics (quant-ph) 010306 general physics Quantum information science |
| Zdroj: | Science (N. Y., N.Y.) 318 (2007): 1889–1892. info:cnr-pdr/source/autori:P.J. Leek, J.M. Fink, A. Blais, R. Bianchetti, M. Goppl, J.M. Gambetta, D.I. Schuster, L. Frunzio, R.J. Schoelkopf, A. Wallraff/titolo:Observation of Berry's phase in a solid state qubit/doi:/rivista:Science (N. Y., N.Y.)/anno:2007/pagina_da:1889/pagina_a:1892/intervallo_pagine:1889–1892/volume:318 |
| ISSN: | 1095-9203 0036-8075 |
| DOI: | 10.1126/science.1149858 |
| Popis: | In quantum information science, the phase of a wavefunction plays an important role in encoding information. While most experiments in this field rely on dynamic effects to manipulate this information, an alternative approach is to use geometric phase, which has been argued to have potential fault tolerance. We demonstrate the controlled accumulation of a geometric phase, Berry's phase, in a superconducting qubit, manipulating the qubit geometrically using microwave radiation, and observing the accumulated phase in an interference experiment. We find excellent agreement with Berry's predictions, and also observe a geometry dependent contribution to dephasing. 5 pages, 4 figures, version with high resolution figures available at http://qudev.ethz.ch/content/science/PubsPapers.html |
| Databáze: | OpenAIRE |
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