Towards quantum turbulence in cold atomic fermionic superfluids
Abstract
Fermionic superfluids provide a new realization of quantum turbulence, accessible to both experiment and theory, yet relevant to phenomena from both cold atoms to nuclear astrophysics. In particular, the strongly interacting Fermi gas realized in cold-atom experiments is closely related to dilute neutron matter in neutron star crusts. Unlike the liquid superfluids 4He (bosons) and 3He (fermions), where quantum turbulence has been studied in laboratory for decades, superfluid Fermi gases stand apart for a number of reasons. They admit a rather reliable theoretical description based on density functional theory called the time-dependent superfluid local density approximation that describes both static and dynamic phenomena. Cold atom experiments demonstrate exquisite control over particle number, spin polarization, density, temperature, and interaction strength. Topological defects such as domain walls and quantized vortices, which lie at the heart of quantum turbulence, can be created and manipulated with time-dependent external potentials, and agree with the time-dependent theoretical techniques. While similar experimental and theoretical control exists for weakly interacting Bose gases, the unitary Fermi gas is strongly interacting. The resulting vortex line density is extremely high, and quantum turbulence may thus be realized in small systems where classical turbulence is suppressed. Fermi gases also permit the studymore »
- Authors:
-
- University of Washington, Seattle, WA (United States)
- University of Washington, Seattle, WA (United States); Washington State University, Pullman, WA (United States)
- University of Washington, Seattle, WA (United States); Warsaw University of Technology (Poland)
- Publication Date:
- Research Org.:
- Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- Polish National Science Center (NCN); USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1535480
- Alternate Identifier(s):
- OSTI ID: 1334543
- Grant/Contract Number:
- FG02-97ER41014; AC02-05CH11231; AC05-00OR22725; UMO-2013/08/A/ST3/00708; UMO-2014/13/D/ST3/01940
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physics. B, Atomic, Molecular and Optical Physics
- Additional Journal Information:
- Journal Volume: 50; Journal Issue: 1; Journal ID: ISSN 0953-4075
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Bulgac, Aurel, Forbes, Michael McNeil, and Wlazłowski, Gabriel. Towards quantum turbulence in cold atomic fermionic superfluids. United States: N. p., 2016.
Web. doi:10.1088/1361-6455/50/1/014001.
Bulgac, Aurel, Forbes, Michael McNeil, & Wlazłowski, Gabriel. Towards quantum turbulence in cold atomic fermionic superfluids. United States. https://doi.org/10.1088/1361-6455/50/1/014001
Bulgac, Aurel, Forbes, Michael McNeil, and Wlazłowski, Gabriel. Tue .
"Towards quantum turbulence in cold atomic fermionic superfluids". United States. https://doi.org/10.1088/1361-6455/50/1/014001. https://www.osti.gov/servlets/purl/1535480.
@article{osti_1535480,
title = {Towards quantum turbulence in cold atomic fermionic superfluids},
author = {Bulgac, Aurel and Forbes, Michael McNeil and Wlazłowski, Gabriel},
abstractNote = {Fermionic superfluids provide a new realization of quantum turbulence, accessible to both experiment and theory, yet relevant to phenomena from both cold atoms to nuclear astrophysics. In particular, the strongly interacting Fermi gas realized in cold-atom experiments is closely related to dilute neutron matter in neutron star crusts. Unlike the liquid superfluids 4He (bosons) and 3He (fermions), where quantum turbulence has been studied in laboratory for decades, superfluid Fermi gases stand apart for a number of reasons. They admit a rather reliable theoretical description based on density functional theory called the time-dependent superfluid local density approximation that describes both static and dynamic phenomena. Cold atom experiments demonstrate exquisite control over particle number, spin polarization, density, temperature, and interaction strength. Topological defects such as domain walls and quantized vortices, which lie at the heart of quantum turbulence, can be created and manipulated with time-dependent external potentials, and agree with the time-dependent theoretical techniques. While similar experimental and theoretical control exists for weakly interacting Bose gases, the unitary Fermi gas is strongly interacting. The resulting vortex line density is extremely high, and quantum turbulence may thus be realized in small systems where classical turbulence is suppressed. Fermi gases also permit the study of exotic superfluid phenomena such as the Larkin–Ovchinnikov–Fulde–Ferrell pairing mechanism for polarized superfluids which may give rise to 3D supersolids, and a pseudo-gap at finite temperatures that might affect the regime of classical turbulence. The dynamics associated with these phenomena has only started to be explored. Finally, superfluid mixtures have recently been realized, providing experimental access to phenomena like Andreev–Bashkin entrainment predicted decades ago. Superfluid Fermi gases thus provide a rich forum for addressing phenomena related to quantum turbulence with applications ranging from terrestrial superfluidity to astrophysical dynamics in neutron stars.},
doi = {10.1088/1361-6455/50/1/014001},
journal = {Journal of Physics. B, Atomic, Molecular and Optical Physics},
number = 1,
volume = 50,
place = {United States},
year = {Tue Dec 06 00:00:00 EST 2016},
month = {Tue Dec 06 00:00:00 EST 2016}
}
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