Goldstone mode and pair-breaking excitations in atomic Fermi superfluids

Tutkimustuotos: Lehtiartikkeli

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Goldstone mode and pair-breaking excitations in atomic Fermi superfluids. / Hoinka, Sascha; Dyke, Paul; Lingham, Marcus G.; Kinnunen, Jami J.; Bruun, Georg M.; Vale, Chris J.

julkaisussa: Nature Physics, Vuosikerta 13, Nro 10, 04.10.2017, s. 943-946.

Tutkimustuotos: Lehtiartikkeli

Harvard

Hoinka, S, Dyke, P, Lingham, MG, Kinnunen, JJ, Bruun, GM & Vale, CJ 2017, 'Goldstone mode and pair-breaking excitations in atomic Fermi superfluids', Nature Physics, Vuosikerta. 13, Nro 10, Sivut 943-946. https://doi.org/10.1038/nphys4187

APA

Hoinka, S., Dyke, P., Lingham, M. G., Kinnunen, J. J., Bruun, G. M., & Vale, C. J. (2017). Goldstone mode and pair-breaking excitations in atomic Fermi superfluids. Nature Physics, 13(10), 943-946. https://doi.org/10.1038/nphys4187

Vancouver

Author

Hoinka, Sascha ; Dyke, Paul ; Lingham, Marcus G. ; Kinnunen, Jami J. ; Bruun, Georg M. ; Vale, Chris J. / Goldstone mode and pair-breaking excitations in atomic Fermi superfluids. Julkaisussa: Nature Physics. 2017 ; Vuosikerta 13, Nro 10. Sivut 943-946.

Bibtex - Lataa

@article{3c530b8c9b844ef8b94defd0c10b78da,
title = "Goldstone mode and pair-breaking excitations in atomic Fermi superfluids",
abstract = "Spontaneous symmetry breaking is a central paradigm of elementary particle physics1, magnetism2, superfluidity3 and superconductivity4. According to Goldstone's theorem, phase transitions that break continuous symmetries lead to the existence of gapless excitations in the long-wavelength limit. These Goldstone modes can become the dominant low-energy excitation, showing that symmetry breaking has a profound impact on the physical properties of matter. Here, we present a comprehensive study of the elementary excitations in a homogeneous strongly interacting Fermi gas through the crossover from a Bardeen-Cooper-Schrieffer (BCS) superfluid to a Bose-Einstein condensate (BEC) of molecules using two-photon Bragg spectroscopy. The spectra exhibit a discrete Goldstone mode, associated with the broken-symmetry superfluid phase, as well as pair-breaking single-particle excitations. Our techniques yield a direct determination of the superfluid pairing gap and speed of sound in close agreement with strong-coupling theories.",
author = "Sascha Hoinka and Paul Dyke and Lingham, {Marcus G.} and Kinnunen, {Jami J.} and Bruun, {Georg M.} and Vale, {Chris J.}",
year = "2017",
month = "10",
day = "4",
doi = "10.1038/nphys4187",
language = "English",
volume = "13",
pages = "943--946",
journal = "Nature Physics",
issn = "1745-2473",
publisher = "Nature Publishing Group",
number = "10",

}

RIS - Lataa

TY - JOUR

T1 - Goldstone mode and pair-breaking excitations in atomic Fermi superfluids

AU - Hoinka, Sascha

AU - Dyke, Paul

AU - Lingham, Marcus G.

AU - Kinnunen, Jami J.

AU - Bruun, Georg M.

AU - Vale, Chris J.

PY - 2017/10/4

Y1 - 2017/10/4

N2 - Spontaneous symmetry breaking is a central paradigm of elementary particle physics1, magnetism2, superfluidity3 and superconductivity4. According to Goldstone's theorem, phase transitions that break continuous symmetries lead to the existence of gapless excitations in the long-wavelength limit. These Goldstone modes can become the dominant low-energy excitation, showing that symmetry breaking has a profound impact on the physical properties of matter. Here, we present a comprehensive study of the elementary excitations in a homogeneous strongly interacting Fermi gas through the crossover from a Bardeen-Cooper-Schrieffer (BCS) superfluid to a Bose-Einstein condensate (BEC) of molecules using two-photon Bragg spectroscopy. The spectra exhibit a discrete Goldstone mode, associated with the broken-symmetry superfluid phase, as well as pair-breaking single-particle excitations. Our techniques yield a direct determination of the superfluid pairing gap and speed of sound in close agreement with strong-coupling theories.

AB - Spontaneous symmetry breaking is a central paradigm of elementary particle physics1, magnetism2, superfluidity3 and superconductivity4. According to Goldstone's theorem, phase transitions that break continuous symmetries lead to the existence of gapless excitations in the long-wavelength limit. These Goldstone modes can become the dominant low-energy excitation, showing that symmetry breaking has a profound impact on the physical properties of matter. Here, we present a comprehensive study of the elementary excitations in a homogeneous strongly interacting Fermi gas through the crossover from a Bardeen-Cooper-Schrieffer (BCS) superfluid to a Bose-Einstein condensate (BEC) of molecules using two-photon Bragg spectroscopy. The spectra exhibit a discrete Goldstone mode, associated with the broken-symmetry superfluid phase, as well as pair-breaking single-particle excitations. Our techniques yield a direct determination of the superfluid pairing gap and speed of sound in close agreement with strong-coupling theories.

UR - http://www.scopus.com/inward/record.url?scp=85030646088&partnerID=8YFLogxK

U2 - 10.1038/nphys4187

DO - 10.1038/nphys4187

M3 - Article

VL - 13

SP - 943

EP - 946

JO - Nature Physics

JF - Nature Physics

SN - 1745-2473

IS - 10

ER -

ID: 15848182