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- W4386461310 abstract "In Landau's Fermi liquid, transport is governed by scattering between quasi-particles. The normal liquid $^3$He conforms to this picture, but only when T$< 0.02$ T$_F$. Here, we observe that the deviation from the standard behavior is concomitant with the fermion-fermion scattering time falling below the Planckian time, $frac{hbar}{k_BT}$. The thermal diffusivity of this quantum liquid is bounded by a minimum set by fundamental physical constants and earlier observed in classical liquids. This implies that collective excitations of the liquid (a sound mode) are carrying heat. We argue that if heat is carried by 2k$_F$ hydrodynamic sound mode, both the amplitude and the hitherto unexplained $T^{1/2}$ temperature dependence of thermal conductivity find an explanation with no other adjustable parameter." @default.
- W4386461310 created "2023-09-06" @default.
- W4386461310 creator A5080163658 @default.
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- W4386461310 date "2023-09-01" @default.
- W4386461310 modified "2023-09-27" @default.
- W4386461310 title "How heat propagates in `non-Fermi liquid' $^3$He" @default.
- W4386461310 doi "https://doi.org/10.48550/arxiv.2309.00502" @default.
- W4386461310 hasPublicationYear "2023" @default.
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