Effect of quantum resonances on local temperature in nonequilibrium open systems

Zeng, Xiangzhong; Ye, Lyuzhou; Zhang, Daochi; Xu, Rui-Xue; Zheng, Xiao; Ventra, Massimiliano Di

doi:10.1103/physrevb.103.085411

Cited by 7 publications

(2 citation statements)

References 96 publications

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“…For the former, the energy spectrum of heat current j α (ω) is calculated via the Landauer formula [32,49] and J α = j α (ω) dω. For the latter, T * ν is determined by an operational protocol based on a min- imal perturbation condition (MPC) [44,48,49,82,83], and the values agree closely to those given by other definitions [84][85][86][87] in the low bias region (see also Supplementary Material). 2) and ( 3), the asymmetric lineshape of A(ω) around µ will give rise to a large negative S, and hence a reverse heat current from lead-R to impurity-2, i.e., J R < 0.…”

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confidence: 62%

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Kondo cooling in quantum impurity systems

Zeng¹,

Ye²,

Cao³

et al. 2022

Preprint

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The Peltier effect is the reverse phenomenon of the Seebeck effect, and has been observed experimentally in nanoscale junctions. However, despite its promising applications in local cooling of nanoelectronic devices, the role of strong electron correlations on such a phenomenon is still unclear. Here, by analyzing the thermoelectric properties of quantum impurity systems out of equilibrium, we unveil the essential role of electron-electron interactions and quantum resonant states in Peltier cooling, leading to the prediction of the Kondo cooling phenomenon. The existence of such Kondo cooling is validated by a reverse heat current and a lowered local temperature in a model junction. The discovery of this unconventional Peltier cooling offers a new approach toward nano-refrigeration, and highlights the unique role of strong electron correlations in nonequilibrium quantum systems.

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confidence: 62%

“…However, the cause of the limited cooling magnitude is largely unclear. Moreover, although the influence of electronelectron interactions and the presence of quantum resonant states on local heating of nanojuntions was widely studied [10,[42][43][44], how these features affect the Peltier cooling has remained a topic barely touched upon.…”

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confidence: 99%

Kondo cooling in quantum impurity systems

Zeng¹,

Ye²,

Cao³

et al. 2022

Preprint

Self Cite

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HEOM‐QUICK2: A general‐purpose simulator for fermionic many‐body open quantum systems—An update

Zhang,

Ye,

Cao

et al. 2024

WIREs Comput Mol Sci

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Many‐body open quantum systems (OQSs) have a profound impact on various subdisciplines of physics, chemistry, and biology. Thus, the development of a computer program capable of accurately, efficiently, and versatilely simulating many‐body OQSs is highly desirable. In recent years, we have focused on the advancement of numerical algorithms based on the fermionic hierarchical equations of motion (HEOM) theory. Being in‐principle exact, this approach allows for the precise characterization of many‐body correlations, non‐Markovian memory, and non‐equilibrium thermodynamic conditions. These efforts now lead to the establishment of a new computer program, HEOM for QUantum Impurity with a Correlated Kernel, version 2 (HEOM‐QUICK2), which, to the best of our knowledge, is currently the only general‐purpose simulator for fermionic many‐body OQSs. Compared with version 1, the HEOM‐QUICK2 program features more efficient solvers for stationary states, more accurate treatment of non‐Markovian memory, and improved numerical stability for long‐time dissipative dynamics. Integrated with quantum chemistry software, HEOM‐QUICK2 has become a valuable theoretical tool for the precise simulation of realistic many‐body OQSs, particularly the single atomic or molecular junctions. Furthermore, the unprecedented precision achieved by HEOM‐QUICK2 enables accurate simulation of low‐energy spin excitations and coherent spin relaxation. The unique usefulness of HEOM‐QUICK2 is demonstrated through several examples of strongly correlated quantum impurity systems under non‐equilibrium conditions. Thus, the new HEOM‐QUICK2 program offers a powerful and comprehensive tool for studying many‐body OQSs with exotic quantum phenomena and exploring applications in various disciplines.This article is categorized under: Data Science > Computer Algorithms and Programming Software > Simulation Methods Theoretical and Physical Chemistry > Statistical Mechanics

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Peltier effect in noninteracting double quantum dots

Zeng,

Ye,

et al. 2023

Chinese Journal of Chemical Physics

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Peltier effect is an important thermoelectric phenomenon which stands for the generation of temperature gradient of the interface between two dissimilar conductors by the electric current flowing through them. In this work, we investigate the Peltier effect in serially coupled noninteracting double quantum dot system under a bias voltage. By means of an accurate hierarchical equations of local temperatures of the two dots differ from each other by applying an electric current through the dots. We then analyze theoretically the influence of interdot and dot-lead coupling on the thermopower and electric current. Finally, we elucidate the variation of Peltier heat and Joule heat with the interdot coupling and dot-lead coupling, which leads to the changes in the local temperature of the quantum dots.

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Effect of quantum resonances on local temperature in nonequilibrium open systems

Cited by 7 publications

References 96 publications

Kondo cooling in quantum impurity systems

Kondo cooling in quantum impurity systems

HEOM‐QUICK2: A general‐purpose simulator for fermionic many‐body open quantum systems—An update

Peltier effect in noninteracting double quantum dots

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