77 citations · 290 across the 11 of their papers we have counts for
9 papers · 1 filter
The Fermi-Pasta-Ulam-Tsingou problem after 70 years: toward universal laws of thermalization in lattice systems in the thermodynamic limit
Weicheng Fu, Zhen Wang, Wei Lin +4
The Fermi--Pasta--Ulam--Tsingou (FPUT) problem provides a paradigmatic framework for understanding thermalization in weakly nonlinear many-body Hamiltonian systems. This focused re…
Interfacial thermal transport with strong system-bath coupling: A phonon delocalization effect
Dahai He, Juzar Thingna, Jianshu Cao
We study the effect of system-bath coupling strength on quantum thermal transport through the interface of two weakly coupled anharmonic molecular chains using quantum self-consist…
Anomalous interfacial temperature profile induced by phonon localization
Yue Liu, Dahai He
Through the integration of the power spectral density, we obtain temperature profiles of both multi-segment harmonic and anharmonic systems, showing the presence of an anomalous ne…
Violation of the virial theorem and generalized equipartition theorem for logarithmic oscillators serving as a thermostat
Kai Chen, Dahai He, Hong Zhao
A logarithmic oscillator has been proposed recently to serve as a thermostat recently since it has a peculiar property of infinite heat capacity according to the virial theorem. In…
Quantum thermal transport through anharmonic systems: A self-consistent approach
Dahai He, Juzar Thingna, Jian-Sheng Wang +1
We propose a feasible and effective approach to study quantum thermal transport through anharmonic systems. The main idea is to obtain an {\it effective} harmonic Hamiltonian for t…
Interfacial thermal conduction and negative temperature jump in one-dimensional lattices
Xiaodong Cao, Dahai He
We study the thermal boundary conduction in one-dimensional harmonic and lattices, both of which consist of two segments coupled by a harmonic interaction. For the ballisti…
Nonlinearity enhanced interfacial thermal conductance and rectification
Lifa Zhang, Juzar Thingna, Dahai He +2
We study the nonlinear interfacial thermal transport across atomic junctions by the quantum self-consistent mean field (QSCMF) theory based on nonequilibrium Green's function appro…
Thermal conductivity of anharmonic lattices: Effective phonons and quantum corrections
Dahai He, Sahin Buyukdagli, Bambi Hu
We compare two effective phonon theories, which have both been applied recently to study heat conduction in anharmonic lattices. In particular, we study the temperature dependence…
Origin of negative differential thermal resistance in a chain of two weakly coupled nonlinear lattices
Dahai He, Sahin Buyukdagli, Bambi Hu
Negative differential resistance in electronic conduction has been extensively studied, but it is not the case for its thermal counterpart, namely, negative differential thermal re…