Direct observation of ultrafast many-body electron dynamics in an ultracold Rydberg gas
Many-body correlations govern a variety of important quantum phenomena such as the emergence of superconductivity and magnetism. Understanding quantum many-body systems is thus one of the central goals of modern sciences. Here we demonstrate an experimental approach towards this goal by utilizing an...
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| Auteurs principaux: | , |
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| Format: | Article (Journal) |
| Langue: | anglais |
| Publié: |
16 Nov 2016
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| In: |
Nature Communications
Year: 2016, Volume: 7 |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/ncomms13449 |
| Accès en ligne: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1038/ncomms13449 Verlag, lizenzpflichtig, Volltext: https://www.nature.com/articles/ncomms13449 
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| Notes sur l'auteur: | Nobuyuki Takei, Christian Sommer, Claudiu Genes, Guido Pupillo, Haruka Goto, Kuniaki Koyasu, Hisashi Chiba, Matthias Weidemüller & Kenji Ohmori |
| Résumé: | Many-body correlations govern a variety of important quantum phenomena such as the emergence of superconductivity and magnetism. Understanding quantum many-body systems is thus one of the central goals of modern sciences. Here we demonstrate an experimental approach towards this goal by utilizing an ultracold Rydberg gas generated with a broadband picosecond laser pulse. We follow the ultrafast evolution of its electronic coherence by time-domain Ramsey interferometry with attosecond precision. The observed electronic coherence shows an ultrafast oscillation with a period of 1 femtosecond, whose phase shift on the attosecond timescale is consistent with many-body correlations among Rydberg atoms beyond mean-field approximations. This coherent and ultrafast many-body dynamics is actively controlled by tuning the orbital size and population of the Rydberg state, as well as the mean atomic distance. Our approach will offer a versatile platform to observe and manipulate non-equilibrium dynamics of quantum many-body systems on the ultrafast timescale. |
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| Description: | Gesehen am 02.06.2020 |
| Description matérielle: | Online Resource |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/ncomms13449 |