scholarly journals The qutrit as a heat diode and circulator

2021 ◽  
Author(s):  
Israel Díaz ◽  
Rafael Sanchez
Keyword(s):  
Heat Transport ◽  
Level System ◽  
Quality Factors ◽  
Thermal Rectification ◽  
Heat Flows ◽  
Superconducting Circuit ◽  
Heat Leakage ◽  
Heat Transport Properties ◽  
Ideal Diode ◽  
Resonant Transitions

Abstract We investigate the heat transport properties of a three-level system coupled to three thermal baths, assuming a model based on superconducting circuit implementations. The system-bath coupling is mediated by resonators which serve as frequency filters for the different qutrit transitions. Taking into account the finite quality factors of the resonators, we find thermal rectification and circulation effects not expected in configurations with perfectly-filtered couplings. Heat leakage in off-resonant transitions can be exploited to make the system work as an ideal diode where heat flows in the same direction between two baths irrespective of the sign of the temperature difference, as well as a perfect heat circulator whose state is phase-reversible.

scholarly journals Disorder effects on heat transport properties of orientationally disordered crystals

2010 ◽  
Vol 81 (9) ◽  
Author(s):  
I. V. Sharapova ◽  
A. I. Krivchikov ◽  
O. A. Korolyuk ◽  
A. Jezowski ◽  
M. Rovira-Esteva ◽  
...  
Keyword(s):  
Transport Properties ◽  
Heat Transport ◽  
Disorder Effects ◽  
Heat Transport Properties ◽  
Disordered Crystals

Heat controlling in the mass-graded harmonic lattices with double-well on-site potential

2018 ◽  
Vol 32 (20) ◽  
pp. 1850217
Author(s):  
Peng Kong ◽  
Zhengzheng Wei ◽  
Tao Hu ◽  
Yi Tang
Keyword(s):  
Molecular Dynamics ◽  
Heat Flux ◽  
Power Spectrum ◽  
Molecular Dynamics Simulations ◽  
Heat Transport ◽  
Nonequilibrium Molecular Dynamics ◽  
Thermal Rectification ◽  
Average Temperature ◽  
New Type ◽  
Dynamics Simulations

Using nonequilibrium molecular dynamics simulations, we investigate thermal rectification in mass-graded lattices with a new type on-site potential which has a physical picture of the double-well. By adjusting the ratio of harmonic on-site potential and anharmonic on-site potential, we could obtain the optimal heat transport and the best thermal rectification. In addition, we observe the reversal thermal rectification by changing the ratio of on-site potential and analyzes the mechanism of thermal rectification through the power spectrum. At last, we also study the heat flux and thermal rectification in a different case of average temperature and mass gradient.

scholarly journals Strain dependence of the heat transport properties of graphene nanoribbons

2012 ◽  
Vol 23 (49) ◽  
pp. 495702 ◽  
Author(s):  
Pei Shan Emmeline Yeo ◽  
Kian Ping Loh ◽  
Chee Kwan Gan
Keyword(s):  
Transport Properties ◽  
Heat Transport ◽  
Graphene Nanoribbons ◽  
Strain Dependence ◽  
Heat Transport Properties

Photothermal methods for determination of thermal properties of bulk materials and thin films

Open Physics ◽  
2010 ◽  
Vol 8 (2) ◽  
Author(s):  
Jerzy Bodzenta ◽  
Anna Kaźmierczak-Bałata ◽  
Jacek Mazur
Keyword(s):  
Thin Films ◽  
Thermal Properties ◽  
Thermal Diffusivity ◽  
Heat Transport ◽  
Temperature Fields ◽  
Nonstationary Temperature ◽  
Measuring Techniques ◽  
Heat Transport Properties ◽  
Photothermal Methods

AbstractInformation on the thermal properties of materials is very important both in fundamental physical research and in engineering applications. The development of materials with desirable heat transport properties requires methods for their experimental determination. In this paper basic concepts of the measurement of parameters describing the heat transport in solids are discussed. Attention is paid to methods utilizing nonstationary temperature fields, especially to photothermal methods in which the temperature disturbance in the investigated sample is generated through light absorption. Exemplary photothermal measuring techniques, which can be realized using common experimental equipment, are described in detail. It is shown that using these techniques it is possible to determine the thermal diffusivity of bulk transparent samples, opaque and semi-transparent plate-form samples, and the thermal conductivity of thin films deposited on thick substrates. Results of the investigation of thermal diffusivity of the ground in the polar region, which is based on the analysis of the propagation of the thermal wave generated by sun-light, are also presented. Based on chosen examples one can state that photothermal techniques can be used for determination of the thermal properties of very different materials.

Convective Heat Transfer Enhancement Using Ferrofluid: A Review

2017 ◽  
Vol 10 (2) ◽  
Author(s):  
Jaswinder Singh Mehta ◽  
Rajesh Kumar ◽  
Harmesh Kumar ◽  
Harry Garg
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Heat Transport ◽  
Convective Heat ◽  
Future Research ◽  
Transfer Enhancement ◽  
Substantial Impact ◽  
Challenges And Opportunities ◽  
Heat Transport Properties ◽  
Research Findings

Ferrofluids, a distinctive class of nanofluid, consists of suspension of magnetic nanoparticles in a nonmagnetic base fluid. Flow and heat transport properties of such a fluid can be manipulated when subjected to external magnetic field and temperature gradient. This unique feature has fascinated researchers across the globe to test its capability as a coolant for miniature electronic devices. The proposed work presents an updated and comprehensive review on ferrofluids with emphasis on heat transfer enhancement of microdevices. Based on the research findings, a number of important variables that have direct bearing on convective heat transport ability of ferrofluid have been recognized. The paper also identifies the key research challenges and opportunities for future research. By critically resolving these challenges, it is anticipated that ferrofluids can make substantial impact as coolant in miniature heat exchangers.

scholarly journals Carrier and heat transport properties of polycrystalline GeSn films on SiO2

2015 ◽  
Vol 107 (23) ◽  
pp. 232105 ◽  
Author(s):  
Noriyuki Uchida ◽  
Tatsuro Maeda ◽  
Ruben R. Lieten ◽  
Shingo Okajima ◽  
Yuji Ohishi ◽  
...  
Keyword(s):  
Transport Properties ◽  
Heat Transport ◽  
Heat Transport Properties
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