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Real-Time Dynamics of Quantized Vortices in a Unitary Fermi Superfluid.

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Title: Real-Time Dynamics of Quantized Vortices in a Unitary Fermi Superfluid.
Authors: Bulgac, Aurel, Yuan-Lung Luo, Magierski, Piotr, Roche, Kenneth J., Yongle Yu
Source: Science (pre-March 2025). 6/10/2011, Vol. 332 Issue 6035, p1288-1291. 4p.
Subjects: Superfluidity, Physics research, Physics -- Methodology, Interacting boson-fermion models, Density functionals, Fermions, Low temperatures, Superconductivity
Abstract: We introduce a comprehensive theoretical framework for the fermionic superfluid dynamics, grounded on a local extension of the time-dependent density functional theory. With this approach, we describe the generation and the real-time evolution and interaction of quantized vortices, the large-amplitude collective modes, as well as the loss of superfluidity at high flow velocities. We demonstrate the formation of vortex rings and provide a microscopic description of the crossing and reconnection of quantized vortex lines in a fermion superfluid, which provide the mechanism for the emergence of quantum turbulence at very low temperatures. We observe that superfluidity often survives when these systems are stirred with velocities far exceeding the speed of sound. [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: Real-Time Dynamics of Quantized Vortices in a Unitary Fermi Superfluid.
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 6/10/2011, Vol. 332 Issue 6035, p1288-1291. 4p.
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  Data: We introduce a comprehensive theoretical framework for the fermionic superfluid dynamics, grounded on a local extension of the time-dependent density functional theory. With this approach, we describe the generation and the real-time evolution and interaction of quantized vortices, the large-amplitude collective modes, as well as the loss of superfluidity at high flow velocities. We demonstrate the formation of vortex rings and provide a microscopic description of the crossing and reconnection of quantized vortex lines in a fermion superfluid, which provide the mechanism for the emergence of quantum turbulence at very low temperatures. We observe that superfluidity often survives when these systems are stirred with velocities far exceeding the speed of sound. [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.1201968
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        Text: English
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      – SubjectFull: Physics research
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      – SubjectFull: Physics -- Methodology
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      – SubjectFull: Interacting boson-fermion models
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      – SubjectFull: Fermions
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      – SubjectFull: Superconductivity
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            NameFull: Roche, Kenneth J.
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              Text: 6/10/2011
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