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Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard
Diabolical points (spectral degeneracies) can naturally occur in spectra of two-dimensional quantum systems and classical wave resonators due to simple symmetries. Geometric Berry phase is associated with these spectral degeneracies. Here, we demonstrate a diabolical point and the corresponding Berr...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5122880/ https://www.ncbi.nlm.nih.gov/pubmed/27886222 http://dx.doi.org/10.1038/srep37653 |
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author | Estrecho, E. Gao, T. Brodbeck, S. Kamp, M. Schneider, C. Höfling, S. Truscott, A. G. Ostrovskaya, E. A. |
author_facet | Estrecho, E. Gao, T. Brodbeck, S. Kamp, M. Schneider, C. Höfling, S. Truscott, A. G. Ostrovskaya, E. A. |
author_sort | Estrecho, E. |
collection | PubMed |
description | Diabolical points (spectral degeneracies) can naturally occur in spectra of two-dimensional quantum systems and classical wave resonators due to simple symmetries. Geometric Berry phase is associated with these spectral degeneracies. Here, we demonstrate a diabolical point and the corresponding Berry phase in the spectrum of hybrid light-matter quasiparticles—exciton-polaritons in semiconductor microcavities. It is well known that sufficiently strong optical pumping can drive exciton-polaritons to quantum degeneracy, whereby they form a macroscopically populated quantum coherent state similar to a Bose-Einstein condensate. By pumping a microcavity with a spatially structured light beam, we create a two-dimensional quantum billiard for the exciton-polariton condensate and demonstrate a diabolical point in the spectrum of the billiard eigenstates. The fully reconfigurable geometry of the potential walls controlled by the optical pump enables a striking experimental visualization of the Berry phase associated with the diabolical point. The Berry phase is observed and measured by direct imaging of the macroscopic exciton-polariton probability densities. |
format | Online Article Text |
id | pubmed-5122880 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-51228802016-11-28 Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard Estrecho, E. Gao, T. Brodbeck, S. Kamp, M. Schneider, C. Höfling, S. Truscott, A. G. Ostrovskaya, E. A. Sci Rep Article Diabolical points (spectral degeneracies) can naturally occur in spectra of two-dimensional quantum systems and classical wave resonators due to simple symmetries. Geometric Berry phase is associated with these spectral degeneracies. Here, we demonstrate a diabolical point and the corresponding Berry phase in the spectrum of hybrid light-matter quasiparticles—exciton-polaritons in semiconductor microcavities. It is well known that sufficiently strong optical pumping can drive exciton-polaritons to quantum degeneracy, whereby they form a macroscopically populated quantum coherent state similar to a Bose-Einstein condensate. By pumping a microcavity with a spatially structured light beam, we create a two-dimensional quantum billiard for the exciton-polariton condensate and demonstrate a diabolical point in the spectrum of the billiard eigenstates. The fully reconfigurable geometry of the potential walls controlled by the optical pump enables a striking experimental visualization of the Berry phase associated with the diabolical point. The Berry phase is observed and measured by direct imaging of the macroscopic exciton-polariton probability densities. Nature Publishing Group 2016-11-25 /pmc/articles/PMC5122880/ /pubmed/27886222 http://dx.doi.org/10.1038/srep37653 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Estrecho, E. Gao, T. Brodbeck, S. Kamp, M. Schneider, C. Höfling, S. Truscott, A. G. Ostrovskaya, E. A. Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard |
title | Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard |
title_full | Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard |
title_fullStr | Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard |
title_full_unstemmed | Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard |
title_short | Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard |
title_sort | visualising berry phase and diabolical points in a quantum exciton-polariton billiard |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5122880/ https://www.ncbi.nlm.nih.gov/pubmed/27886222 http://dx.doi.org/10.1038/srep37653 |
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