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Fundamental dissipation due to bound fermions in the zero-temperature limit

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Fundamental dissipation due to bound fermions in the zero-temperature limit. / Autti, Samuli; Ahlstrom, Sean; Haley, Richard et al.
In: Nature Communications, Vol. 11, 4742, 21.09.2020.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Autti, S, Ahlstrom, S, Haley, R, Jennings, A, Pickett, G, Poole, M, Schanen, R, Soldatov, AA, Tsepelin, V, Vonka, J, Wilcox, T, Woods, A & Zmeev, D 2020, 'Fundamental dissipation due to bound fermions in the zero-temperature limit', Nature Communications, vol. 11, 4742. https://doi.org/10.1038/s41467-020-18499-1

APA

Autti, S., Ahlstrom, S., Haley, R., Jennings, A., Pickett, G., Poole, M., Schanen, R., Soldatov, A. A., Tsepelin, V., Vonka, J., Wilcox, T., Woods, A., & Zmeev, D. (2020). Fundamental dissipation due to bound fermions in the zero-temperature limit. Nature Communications, 11, Article 4742. https://doi.org/10.1038/s41467-020-18499-1

Vancouver

Autti S, Ahlstrom S, Haley R, Jennings A, Pickett G, Poole M et al. Fundamental dissipation due to bound fermions in the zero-temperature limit. Nature Communications. 2020 Sept 21;11:4742. doi: 10.1038/s41467-020-18499-1

Author

Autti, Samuli ; Ahlstrom, Sean ; Haley, Richard et al. / Fundamental dissipation due to bound fermions in the zero-temperature limit. In: Nature Communications. 2020 ; Vol. 11.

Bibtex

@article{7d1e0a86d6f7435797ecd2f32f4f9c2d,
title = "Fundamental dissipation due to bound fermions in the zero-temperature limit",
abstract = "The ground state of a fermionic condensate is well protected against perturbations in the presence of an isotropic gap. Regions of gap suppression, surfaces and vortex cores which host Andreev-bound states, seemingly lift that strict protection. Here we show that in superfluid 3He the role of bound states is more subtle: when a macroscopic object moves in the superfluid at velocities exceeding the Landau critical velocity, little to no bulk pair breaking takes place, while the damping observed originates from the bound states covering the moving object. We identify two separate timescales that govern the bound state dynamics, one of them much longer than theoretically anticipated, and show that the bound states do not interact with bulk excitations. ",
author = "Samuli Autti and Sean Ahlstrom and Richard Haley and Ash Jennings and George Pickett and Malcolm Poole and Roch Schanen and Soldatov, {A. A.} and Viktor Tsepelin and Jakub Vonka and Tom Wilcox and Andrew Woods and Dmitry Zmeev",
year = "2020",
month = sep,
day = "21",
doi = "10.1038/s41467-020-18499-1",
language = "English",
volume = "11",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - Fundamental dissipation due to bound fermions in the zero-temperature limit

AU - Autti, Samuli

AU - Ahlstrom, Sean

AU - Haley, Richard

AU - Jennings, Ash

AU - Pickett, George

AU - Poole, Malcolm

AU - Schanen, Roch

AU - Soldatov, A. A.

AU - Tsepelin, Viktor

AU - Vonka, Jakub

AU - Wilcox, Tom

AU - Woods, Andrew

AU - Zmeev, Dmitry

PY - 2020/9/21

Y1 - 2020/9/21

N2 - The ground state of a fermionic condensate is well protected against perturbations in the presence of an isotropic gap. Regions of gap suppression, surfaces and vortex cores which host Andreev-bound states, seemingly lift that strict protection. Here we show that in superfluid 3He the role of bound states is more subtle: when a macroscopic object moves in the superfluid at velocities exceeding the Landau critical velocity, little to no bulk pair breaking takes place, while the damping observed originates from the bound states covering the moving object. We identify two separate timescales that govern the bound state dynamics, one of them much longer than theoretically anticipated, and show that the bound states do not interact with bulk excitations.

AB - The ground state of a fermionic condensate is well protected against perturbations in the presence of an isotropic gap. Regions of gap suppression, surfaces and vortex cores which host Andreev-bound states, seemingly lift that strict protection. Here we show that in superfluid 3He the role of bound states is more subtle: when a macroscopic object moves in the superfluid at velocities exceeding the Landau critical velocity, little to no bulk pair breaking takes place, while the damping observed originates from the bound states covering the moving object. We identify two separate timescales that govern the bound state dynamics, one of them much longer than theoretically anticipated, and show that the bound states do not interact with bulk excitations.

U2 - 10.1038/s41467-020-18499-1

DO - 10.1038/s41467-020-18499-1

M3 - Journal article

VL - 11

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 4742

ER -