Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Higher-Than-Ballistic Conduction of Viscous Electron Flows   Strongly interacting electrons can move in a neatly coordinated way,
reminiscent of the movement of viscous fluids. Here we show that in viscous
flows interactions facilitate transport, allowing conductance to exceed the
fundamental Landauer's ballistic limit $G_{\rm ball}$. The effect is
particularly striking for the flow through a viscous point contact, a
constriction exhibiting the quantum-mechanical ballistic transport at $T=0$ but
governed by electron hydrodynamics at elevated temperatures. We develop a
theory of the ballistic-to-viscous crossover using an approach based on
quasi-hydrodynamic variables. Conductance is found to obey an additive relation
$G=G_{\rm ball}+G_{\rm vis}$, where the viscous contribution $G_{\rm vis}$
dominates over $G_{\rm ball}$ in the hydrodynamic limit. We argue that
superballistic, low-dissipation transport is a generic feature of viscous
electronics.

30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat