Ultrafast many-body interferometry of impurities coupled to a Fermi sea.

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Title: Ultrafast many-body interferometry of impurities coupled to a Fermi sea.
Authors: Cetina, Marko, Jag, Michael, Lous, Rianne S., Fritsche, Isabella, Walraven, Jook T. M., Grimm, Rudolf, Levinsen, Jesper, Parish, Meera M., Schmidt, Richard, Knap, Michael, Demler, Eugene
Source: Science (pre-March 2025). 10/7/2016, Vol. 354 Issue 6308, p96-99. 4p. 1 Diagram, 3 Graphs.
Subjects: Nonequilibrium thermodynamics, Fermi energy, Time-domain analysis, Quasiparticles, Interferometry
Abstract: The fastest possible collective response of a quantum many-body system is related to its excitations at the highest possible energy. In condensed matter systems, the time scale for such “ultrafast” processes is typically set by the Fermi energy. Taking advantage of fast and precise control of interactions between ultracold atoms, we observed nonequilibrium dynamics of impurities coupled to an atomic Fermi sea. Our interferometric measurements track the nonperturbative quantum evolution of a fermionic many-body system, revealing in real time the formation dynamics of quasi-particles and the quantum interference between attractive and repulsive states throughout the full depth of the Fermi sea. Ultrafast time-domain methods applied to strongly interacting quantum gases enable the study of the dynamics of quantum matter under extreme nonequilibrium conditions. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Ultrafast many-body interferometry of impurities coupled to a Fermi sea.
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  Data: <searchLink fieldCode="AR" term="%22Cetina%2C+Marko%22">Cetina, Marko</searchLink><br /><searchLink fieldCode="AR" term="%22Jag%2C+Michael%22">Jag, Michael</searchLink><br /><searchLink fieldCode="AR" term="%22Lous%2C+Rianne+S%2E%22">Lous, Rianne S.</searchLink><br /><searchLink fieldCode="AR" term="%22Fritsche%2C+Isabella%22">Fritsche, Isabella</searchLink><br /><searchLink fieldCode="AR" term="%22Walraven%2C+Jook+T%2E+M%2E%22">Walraven, Jook T. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Grimm%2C+Rudolf%22">Grimm, Rudolf</searchLink><br /><searchLink fieldCode="AR" term="%22Levinsen%2C+Jesper%22">Levinsen, Jesper</searchLink><br /><searchLink fieldCode="AR" term="%22Parish%2C+Meera+M%2E%22">Parish, Meera M.</searchLink><br /><searchLink fieldCode="AR" term="%22Schmidt%2C+Richard%22">Schmidt, Richard</searchLink><br /><searchLink fieldCode="AR" term="%22Knap%2C+Michael%22">Knap, Michael</searchLink><br /><searchLink fieldCode="AR" term="%22Demler%2C+Eugene%22">Demler, Eugene</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 10/7/2016, Vol. 354 Issue 6308, p96-99. 4p. 1 Diagram, 3 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Nonequilibrium+thermodynamics%22">Nonequilibrium thermodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Fermi+energy%22">Fermi energy</searchLink><br /><searchLink fieldCode="DE" term="%22Time-domain+analysis%22">Time-domain analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Quasiparticles%22">Quasiparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Interferometry%22">Interferometry</searchLink>
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  Data: The fastest possible collective response of a quantum many-body system is related to its excitations at the highest possible energy. In condensed matter systems, the time scale for such “ultrafast” processes is typically set by the Fermi energy. Taking advantage of fast and precise control of interactions between ultracold atoms, we observed nonequilibrium dynamics of impurities coupled to an atomic Fermi sea. Our interferometric measurements track the nonperturbative quantum evolution of a fermionic many-body system, revealing in real time the formation dynamics of quasi-particles and the quantum interference between attractive and repulsive states throughout the full depth of the Fermi sea. Ultrafast time-domain methods applied to strongly interacting quantum gases enable the study of the dynamics of quantum matter under extreme nonequilibrium conditions. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1126/science.aaf5134
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      – SubjectFull: Time-domain analysis
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              Text: 10/7/2016
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