Related papers: Suppression of quantized heat flow by the dielectric response of a compressible strip at the quantum Hall edge

Suppression of quantized heat flow by the dielectric response of a compressible strip at the quantum Hall edge

URL: http://arxiv.org/abs/2510.22459v1
Date: Sat, 25 Oct 2025 23:55:01 GMT
Title: Suppression of quantized heat flow by the dielectric response of a compressible strip at the quantum Hall edge
Authors: Eugene V. Sukhorukov, Adrien Tomà,
Abstract summary: We develop a unified perturbative framework for energy transport along a chiral quantum Hall edge coupled to a disordered, compressible strip.<n>Treating the strip as a generic linear response environment characterized by its retarded susceptibility, we derive leading-order interaction corrections to both the edge heat flux and the plasmon spectrum.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We develop a unified perturbative framework for energy transport along a chiral quantum Hall (QH) edge coupled to a disordered, compressible strip. Treating the strip as a generic linear response environment characterized by its retarded susceptibility $\chi_q^R(k,\omega)$, we derive leading-order interaction corrections to both the edge heat flux and the plasmon spectrum. Two complementary regimes are analyzed: (i) a gapped, local dielectric response with finite-range coupling, which yields a universal negative $T^4$ correction to the quantized heat flux and a corresponding convex cubic term in the plasmon dispersion; and (ii) a hydrodynamic (diffusive) response with relaxation, producing a crossover from $T^4$ to $T^{3/2}$ scaling and a change of sign in the correction. The resulting backaction reduces the plasmon group velocity and can suppress the apparent thermal conductance by an amount consistent with experiment. Importantly, the total heat flux remains quantized: the apparent deficit in the plasmon contribution corresponds to an induced energy flow within the compressible strip, representing a form of heat drag between chiral and nonchiral modes. The framework thus provides a microscopic and quantitatively plausible explanation of the ``missing heat flux'' anomaly observed at QH edges and links its transport signature to the nonlinearity of the plasmon spectrum.

Related papers

Symmetry-protected topology and deconfined solitons in a multi-link $\mathbb{Z}_2$ gauge theory [45.88028371034407]
We study a $mathbbZ$ lattice gauge theory defined on a multi-graph with links that can be visualized as great circles of a spherical shell.<n>We show that this leads to state-dependent tunneling amplitudes underlying a phenomenon analogous to the Peierls instability.<n>By performining a detailed analysis based on matrix product states, we prove that charge deconfinement emerges as a consequence of charge-fractionalization.
arXiv Detail & Related papers (2026-03-02T22:59:25Z)
Quantum Bipolar Thermoelectricity [39.3098730337656]
bipolar quantum thermoelectricity could provide a new route for spectroscopic sensing of electromagnetic modes.<n>Results suggest that bipolar quantum thermoelectricity could provide a new route for spectroscopic sensing of electromagnetic modes.
arXiv Detail & Related papers (2025-08-05T08:46:39Z)
Nonequilibrium quantum heat transport between structured environments [0.0]
We apply the hierarchical equations of motion technique to analyze nonequilibrium heat transport in a spin-boson type model. We find the heat current to be drastically modified at weak system-bath coupling. Our analysis highlights a novel mechanism for controlling heat transport in nanoscale systems.
arXiv Detail & Related papers (2024-03-20T18:20:12Z)
Heat transport in the quantum Rabi model: Universality and ultrastrong coupling effects [0.0]
Heat transport in the quantum Rabi model at weak interaction with the heat baths is controlled by the qubit-oscillator coupling. Universality of the linear conductance versus the temperature is found for $Tlesssim T_K$, with $T_K$ a coupling-dependent Kondo-like temperature.
arXiv Detail & Related papers (2024-03-11T17:00:47Z)
Thermopower in hBN/graphene/hBN superlattices [46.287853697580566]
We experimentally study thermopower in high-quality monolayer graphene within heterostructures consisting of complete hBN encapsulation and 1D edge contacts. We show that the temperature dependence of the thermopower enables the assessment of the role of built-in strain variation and van Hove singularities. We show the same superlattice device can exhibit a temperature-driven thermopower reversal from positive to negative and vice versa, by controlling the carrier density.
arXiv Detail & Related papers (2023-06-14T19:06:34Z)
Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins. These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field. We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
arXiv Detail & Related papers (2023-05-10T12:59:07Z)
On the Su-Schrieffer-Heeger model of electron transport: low-temperature optical conductivity by the Mellin transform [62.997667081978825]
We describe the low-temperature optical conductivity as a function of frequency for a quantum-mechanical system of electrons that hop along a polymer chain. Our goal is to show vias how the interband conductivity of this system behaves as the smallest energy bandgap tends to close.
arXiv Detail & Related papers (2022-09-26T23:17:39Z)
Thermal self-oscillations in monolayer graphene coupled to a superconducting microwave cavity [58.720142291102135]
We observe thermal self-oscillations in a monolayer graphene flake coupled to superconducting resonator. The experimental observations fit well with theoretical model based on thermal instability. The modelling of the oscillation sidebands provides a method to evaluate electron phonon coupling in disordered graphene sample at low energies.
arXiv Detail & Related papers (2022-05-27T15:38:41Z)
Nonequilibrium thermal transport and photon squeezing in a quadratic qubit-resonator system [4.81203316967207]
We investigate steady-state thermal transport and photon statistics in a nonequilibrium hybrid quantum system. The effect of negative differential thermal conductance is unravelled at finite temperature bias. It is found that the intrinsically asymmetric structure of the hybrid system and negative differential thermal conductance show the cooperative contribution.
arXiv Detail & Related papers (2021-07-16T02:02:25Z)
Exact thermal properties of free-fermionic spin chains [68.8204255655161]
We focus on spin chain models that admit a description in terms of free fermions. Errors stemming from the ubiquitous approximation are identified in the neighborhood of the critical point at low temperatures.
arXiv Detail & Related papers (2021-03-30T13:15:44Z)
Quantum versus thermal fluctuations in the harmonic chain and experimental implications [0.0]
The transition from pure quantum fluctuations at $T=0$ to classical thermal fluctuations in the high temperature limit is described. The absence of sharp Bragg peaks in x-ray scattering in an infinite chain at zero temperature shows power law behaviour typical for one dimensional quantum liquids.
arXiv Detail & Related papers (2020-08-25T13:44:39Z)
Probing eigenstate thermalization in quantum simulators via fluctuation-dissipation relations [77.34726150561087]
The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems. Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations. Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
arXiv Detail & Related papers (2020-07-20T18:00:02Z)

This list is automatically generated from the titles and abstracts of the papers in this site.