scholarly journals Optical signatures of shear collective modes in strongly interacting Fermi liquids

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
D. Valentinis
Keyword(s):  
Collective Modes ◽  
Fermi Liquids ◽  
Strongly Interacting

scholarly journals Atypical behavior of collective modes in two-dimensional Fermi liquids

2020 ◽  
Vol 32 (34) ◽  
pp. 345602 ◽  
Author(s):  
M P Gochan ◽  
J T Heath ◽  
K S Bedell
Keyword(s):  
Collective Modes ◽  
Fermi Liquids ◽  
Two Dimensional

scholarly journals Universal sound diffusion in a strongly interacting Fermi gas

Science ◽  
2020 ◽  
Vol 370 (6521) ◽  
pp. 1222-1226 ◽  
Author(s):  
Parth B. Patel ◽  
Zhenjie Yan ◽  
Biswaroop Mukherjee ◽  
Richard J. Fletcher ◽  
Julian Struck ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Sound Propagation ◽  
Fermi Gas ◽  
Nuclear Fission ◽  
Superfluid Transition ◽  
Quantum Limit ◽  
Fermi Liquids ◽  
Coupled Transport ◽  
Strongly Interacting ◽  
Universal Quantum

Transport of strongly interacting fermions is crucial for the properties of modern materials, nuclear fission, the merging of neutron stars, and the expansion of the early Universe. Here, we observe a universal quantum limit of diffusivity in a homogeneous, strongly interacting atomic Fermi gas by studying sound propagation and its attenuation through the coupled transport of momentum and heat. In the normal state, the sound diffusivity D monotonically decreases upon lowering the temperature, in contrast to the diverging behavior of weakly interacting Fermi liquids. Below the superfluid transition temperature, D attains a universal value set by the ratio of Planck’s constant and the particle mass. Our findings inform theories of fermion transport, with relevance for hydrodynamic flow of electrons, neutrons, and quarks.

scholarly journals Hidden and mirage collective modes in two dimensional Fermi liquids

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Avraham Klein ◽  
Dmitrii L. Maslov ◽  
Andrey V. Chubukov
Keyword(s):  
Collective Modes ◽  
Fermi Liquids ◽  
Two Dimensional

scholarly journals Density response and collective modes of semiholographic non-Fermi liquids

2017 ◽  
Vol 96 (10) ◽  
Author(s):  
Benoit Douçot ◽  
Christian Ecker ◽  
Ayan Mukhopadhyay ◽  
Giuseppe Policastro
Keyword(s):  
Collective Modes ◽  
Fermi Liquids ◽  
Density Response
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