Three-terminal energy harvester with coupled quantum dots

Thierschmann, Holger; Sánchez, Rafael; Sothmann, Björn; Arnold, Fabian; Heyn, Ch.; Hansen, W.; Buhmann, H.; Molenkamp, L. W.

doi:10.1038/nnano.2015.176

Cited by 241 publications

(304 citation statements)

References 26 publications

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“…27 Other heat engine designs, which utilize Coulomb blockade physics, have also been discussed. 2,[12][13][14][15] In order to properly treat the Coulomb blockade, or strong correlation effects in general, one has either to resort to numerical methods, or different analytical approaches. 2 …”

Section: Discussionmentioning

confidence: 99%

Implementation of transmission functions for an optimized three-terminal quantum dot heat engine

Schiegg

Dzierzawa

Eckern

2017

J. Phys.: Condens. Matter

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We consider two modifications of a recently proposed three-terminal quantum dot heat engine. First, we investigate the necessity of the thermalization assumption, namely that electrons are always thermalized by inelastic processes when traveling across the cavity where the heat is supplied. Second, we analyze various arrangements of tunneling-coupled quantum dots in order to implement a transmission function that is superior to the Lorentzian transmission function of a single quantum dot. We show that the maximum power of the heat engine can be improved by about a factor of two, even for a small number of dots, by choosing an optimal structure.

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Section: Discussionmentioning

confidence: 99%

Implementation of transmission functions for an optimized three-terminal quantum dot heat engine

Schiegg

Dzierzawa

Eckern

2017

J. Phys.: Condens. Matter

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“…Meanwhile, mesoscopic conductors with asymmetric and nonlinear couplings to multiple charge heat baths were proposed to generate unidirectional charge current [19][20][21]. Net electrical currents have been observed experimentally in those mesoscopic ratchets [22,23], demonstrating their capability of rectifying heat to work.…”

Section: Introductionmentioning

confidence: 99%

Electrical autonomous Brownian gyrator

et al. 2017

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We study experimentally and theoretically the steady-state dynamics of a simple stochastic electronic system featuring two resistor-capacitor circuits coupled by a third capacitor. The resistors are subject to thermal noises at real temperatures. The voltage fluctuation across each resistor can be compared to a one-dimensional Brownian motion. However, the collective dynamical behavior, when the resistors are subject to distinct thermal baths, is identical to that of a Brownian gyrator, as first proposed by R. Filliger and P. Reimann in Physical Review Letters 99, 230602 (2007). The average gyrating dynamics is originated from the absence of detailed balance due to unequal thermal baths. We look into the details of this stochastic gyrating dynamics, its dependences on the temperature difference and coupling strength, and the mechanism of heat transfer through this simple electronic circuit. Our work affirms the general principle and the possibility of a Brownian ratchet working near room temperature scale.

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“…Suggestions for realizations in several other quantum systems include quantum dots [47,48], superconducting devices [49][50][51][52], cold bosons [53], and optomechanical systems [34,54,55]. For other related experiments and their theoretical studies, see [56][57][58][59][60]. numerical examples in [1]) .…”

Section: Introductionmentioning

confidence: 99%

Quantum Heat Machines Equivalence, Work Extraction beyond Markovianity, and Strong Coupling via Heat Exchangers

Uzdin

Levy

Kosloff

2016

Entropy

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Various engine types are thermodynamically equivalent in the quantum limit of small "engine action". Our previous derivation of the equivalence is restricted to Markovian heat baths and to implicit classical work repository (e.g., laser light in the semi-classical approximation). In this paper, all the components, baths, batteries, and engines, are explicitly taken into account. To neatly treat non-Markovian dynamics, we use mediating particles that function as a heat exchanger. We find that, on top of the previously observed equivalence, there is a higher degree of equivalence that cannot be achieved in the Markovian regime. Next, we focus on the quality of the battery charging process. A condition for positive energy increase and zero entropy increase (work) is given. Moreover, it is shown that, in the strong coupling regime, it is possible to super-charge a battery. With super-charging, the energy of the battery is increased while its entropy is being reduced at the same time.

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Three-terminal energy harvester with coupled quantum dots

Cited by 241 publications

References 26 publications

Implementation of transmission functions for an optimized three-terminal quantum dot heat engine

Implementation of transmission functions for an optimized three-terminal quantum dot heat engine

Electrical autonomous Brownian gyrator

Quantum Heat Machines Equivalence, Work Extraction beyond Markovianity, and Strong Coupling via Heat Exchangers

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