Exploring the role of asymmetric-pulse modulation in quantum thermal machines and quantum thermometry

Mondal, Saikat; Bhattacharjee, Sourav; Dutta, Amit

doi:10.1103/physreve.102.022140

Cited by 9 publications

(2 citation statements)

References 42 publications

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“…In this paper, we introduce the idea of adjusting the interaction time asymmetry in order to optimize the engine performance. The present approach is rather different from some findings [10,19,36,37] exactly because we explore this adjustment of the interaction time; that is, the interaction time is the focus of our study. Despite the simplicity of the system, its large applicability and richness allow its usage as heat engine, refrigerator, heater, or accelerator, hence highlighting the importance of searching for optimized protocols.…”

Section: Maximal Power For Heat Engines: Role Of Asymmetric Interaction Timesmentioning

confidence: 84%

Termodinâmica estocástica e eficiência para máquinas térmicas colisionais

Filho¹,

Francisco²

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The performance of endoreversible thermal machines operating at finite power regime constitutes one of the main challenges of nonequilibrium thermodynamics, for classical and quantum systems. In this master's thesis we study the thermodynamic properties of collisional models of quantum dot and Brownian particle nanoscale thermal engines. In the present case, at each time interval, the system interact with a different thermal reservoir and under a different external force (in the Brownian case). The thermal properties are characterized using stochastic thermodynamics and the performance optimization of the engine in relation to different parameters (asymmetric times, forces and other quantities) is analyzed. Our results show that the present approach constitutes an adequate tool / methodology useful in the study of thermal engines working in finite time, in contrast to an idealized Carnot's machine.

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Section: Maximal Power For Heat Engines: Role Of Asymmetric Interaction Timesmentioning

confidence: 84%

Termodinâmica estocástica e eficiência para máquinas térmicas colisionais

Filho¹,

Francisco²

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“…We introduce the idea of adjusting the interaction time asymmetry to optimize engine performance. Despite the simplicity of the system, it presents the regimes of heat engine, refrigerator, heater, and accelerator, highlighting the importance of searching for optimized protocols [159,169,186,187]. As a first finding, asymmetric interaction times play an important role in enhancing power output.…”

Section: Heat Enginesmentioning

confidence: 99%

O papel do tempo em fenômenos fora do equilíbrio: coarse-graining por transições, transições de fase e máquinas térmicas

Harunari¹

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This thesis and all the work done during my Ph.D. would not be possible without the academic and non-academic contribution of many people I was lucky enough to come across.First and foremost, my wife Maria Angélica, with whom I grew up together in every possible sense, for the mutual and timely attractive forces, and for emphasizing the lyricism of the world. You are a constant smile in the best memories and a shoulder in the worst, your kind heart and beautiful mind are inspiring. I hope you experience immeasurable happiness in your life. Prepare for our many adventures to come.A bit of Portuguese now: meus incríveis pais Eduardo e Cecília, vó e bachan, cujos generosos e incessantes esforc ¸os foram fundamentais. Sempre que sentirem orgulho de mim, sintam de vocês também. Meus irmãos Fábio e Paulo, tios, primos, sogros, cunhadas, sobrinhos, cachorras e todo o resto da família, por todas as relac ¸ões de apoio, carinho e muita diversão.My supervisor Fiore, for his always sincere advice that contributed to my development in several aspects, including learning how to study, research, and behave as a physicist should.Matteo, who fortuitously became something of a mentor to me, for the unexpected amount of trust and the large amount of shared knowledge. Mário de Oliveira, for inspiring and introducing me to physics research. And Landi, for getting me back on track when I got the closest to quitting.With my friends I shared several discussions about physics and science, but all the fun moments were very important to keep up with the studies. Pedro and Luís, for our rare and constant friendship, in which we always try and improve each other with companionship, honesty, and rationality. During this period I was also fortunate enough to have Ariel, Isa and G ülce as best friends, three brilliant and inspiring human beings. And the list goes on with Mayhara, Irem, Rongrong, Lufê, Mari, Lefundes, Gustavo, and definitely many more.In the meantime, I greatly benefitted from scientific visits, and for that I am thankful to Massimiliano, his excellent group at the University of Luxembourg, Édgar, and Jukka.The life at the University of São Paulo, the department, the research group, all professors, colleagues and employees, meals at bandejão, coffees, parties, Tubatuque presentations, classes, discussions, and time spent at the campus will be fondly remembered. Fundac ¸ão Antônio e Helena Zerrenner, ETWB teachers and staff, for providing me with high-quality free-of-cost education, without which I would not be able to enroll in such a prestigious university.I acknowledge the São Paulo Research Foundation (FAPESP) for the financial support through grants #2017/24567-0 and #2020/03708-8 and, above all, for giving the most stable grants in Brazil, even in difficult times; the foundation approach to scientific funding is exemplary. I am thankful to the examining committee, a set of physicists that I greatly admire that contributed with comments and insightful discussions. Lastly, I have to cite Milton Nascimento, for all the hours ...

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Optimal probes for global quantum thermometry

et al. 2021

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Quantum thermodynamics has emerged as a separate sub-discipline, revising the concepts and laws of thermodynamics, at the quantum scale. In particular, there has been a disruptive shift in the way thermometry, and thermometers are perceived and designed. Currently, we face two major challenges in quantum thermometry. First, all of the existing optimally precise temperature probes are local, meaning their operation is optimal only for a narrow range of temperatures. Second, aforesaid optimal local probes mandate complex energy spectrum with immense degeneracy, rendering them impractical. Here, we address these challenges by formalizing the notion of global thermometry leading to the development of optimal temperature sensors over a wide range of temperatures. We observe the emergence of different phases for such optimal probes as the temperature interval is increased. In addition, we show how the best approximation of optimal global probes can be realized in spin chains, implementable in ion traps and quantum dots.

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Exploring the role of asymmetric-pulse modulation in quantum thermal machines and quantum thermometry

Cited by 9 publications

References 42 publications

Termodinâmica estocástica e eficiência para máquinas térmicas colisionais

Termodinâmica estocástica e eficiência para máquinas térmicas colisionais

O papel do tempo em fenômenos fora do equilíbrio: coarse-graining por transições, transições de fase e máquinas térmicas

Optimal probes for global quantum thermometry

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