Experimental realization of a Coulomb blockade refrigerator

Feshchenko, A. V.; Koski, Jonne; Pekola, Jukka P.

doi:10.1103/physrevb.90.201407

Cited by 29 publications

(35 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, two different approaches seem to be outstanding. First, thermoelectric devices, which use the interplay of thermal and chemical gradients to perform useful tasks, were proposed [1][2][3][4][5][6] and experimentally realized using quantum dot (QD) structures [7][8][9][10]. Second, self-oscillating machines, which are coupled to multiple thermal reservoirs, were analyzed theoretically [11][12][13][14][15][16][17][18][19][20] and experimentally [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Proposal of a Realistic Stochastic Rotor Engine Based on Electron Shuttling

2019

View full text Add to dashboard Cite

We propose and analyse an autonomous engine, which combines ideas from electronic transport and selfoscillating heat engines. It is based on the electron-shuttling mechanism in conjunction with a rotational degree of freedom. We focus in particular on the isothermal regime, where chemical work is converted into mechanical work or vice versa, and we especially pay attention to use parameters estimated from experimental data of available single components. Our analysis shows that for these parameters the engine already works remarkably stable, albeit with moderate efficiency. Moreover, it has the advantage that it can be up-scaled to increase power and reduce fluctuations further. arXiv:1903.07500v2 [cond-mat.stat-mech]

show abstract

Section: Introductionmentioning

confidence: 99%

Proposal of a Realistic Stochastic Rotor Engine Based on Electron Shuttling

2019

View full text Add to dashboard Cite

show abstract

“…For comparison, Ref. [74] reaches with a Coulomb blockade refrigerator a maximum value of 15 mK at a base temperature of 90 mK. Therefore, our results might be of great importance for the implementation of coolers in nanochips simultaneously showing optimal performance and avoiding heating effects.…”

Section: Discussionmentioning

confidence: 73%

Nonlinear chiral refrigerators

Sánchez

López

et al. 2019

Phys. Rev. B

View full text Add to dashboard Cite

We investigate a mesoscopic refrigerator based on chiral quantum Hall edge channels. We discuss a three-terminal cooling device in which charge transport occurs between a pair of voltage-biased terminals only. The third terminal, which is to be cooled, is set as a voltage probe with vanishing particle flux. This largely prevents the generation of direct Joule heating which ensures a high coefficient of performance. Cooling operation is based on energy-dependent quantum transmissions. The latter are implemented with the aid of two tunable scattering resonances (quantum dots). To find the optimal performance point and the largest temperature difference created with our refrigerator, it is crucial to address the nonlinear regime of transport, accounting for electronelectron interaction effects. Our numerical simulations show that the maximal cooling power can be tuned with the quantum dot couplings and energy levels. Further, we provide analytical expressions within a weakly nonlinear scattering-matrix formalism which allow us to discuss the conditions for optimal cooling in terms of generalized thermopowers. Our results are important for the assessment of chiral conductors as promising candidates for efficient quantum refrigerators with low dissipation.

show abstract

“…The effect of the Coulomb interactions is investigated, leading to unexpected configurations where the system is colder than the refrigerator island. These findings suggest the impact of non-equilibrium correlations on the thermodynamic properties of mesoscopic configurations which are under nowadays experimental reach 14,34,39 . I am grateful to Jukka P. Pekola for encouraging discussions and his valuable help, and thank the Aalto University for its hospitality during a visit when this work was conceived.…”

mentioning

confidence: 76%

Correlation-induced refrigeration with superconducting single-electron transistors

Sánchez

2017

Applied Physics Letters

View full text Add to dashboard Cite

A model of a superconducting tunnel junction which refrigerates a nearby metallic island without any particle exchange is presented. Heat extraction is mediated by charge fluctuations in the coupling capacitance of the two systems. The interplay of Coulomb interaction and the superconducting gap reduces the power consumption of the refrigerator. The island is predicted to be cooled from lattice temperatures of 200 mK down to close to 50 mK, for realistic parameters. The results emphasize the role of non-equilibrium correlations in bipartite mesoscopic conductors. This mechanism can be applied to create local temperature gradients in tunnel junction arrays or explore the role of interactions in the thermalization of non-equilibrium systems.Quantum coherent processes relevant to quantum information or quantum thermodynamics 1 are usually damaged by temperature. Solid state quantum simulators 2 or heat engines 3,4 have recently been proposed that operate at very low temperatures. Finding ways to cool nanoscale systems 5,6 , or introduce local temperature gradients well below 100 mK without injecting charge into them is hence a demanding task. This way they are minimally perturbed and not affected by Joule heating.Thermoelectric refrigeration is traditionally based on the Peltier effect. Driving a current through a conductor with broken electron-hole symmetry converts thermal excitations into transport. Mesoscopic refrigerators based on this effect make use of semiconductor quantum dots 7,8 , superconducting-insulator-normal metal (SIN) junctions 9-12 , or single-electron transistors (SET) 13,14 . Cooling mediated by the coupling to cavity photons has also been proposed in Josephson junctions 15-17 and implemented for the refrigeration of metallic islands [18][19][20][21][22] . Here an alternative approach is proposed based on the capacitive coupling of a two-terminal SINIS SET to the system to be cooled, see Fig. 1. We consider cooling of a single-electron box (SEB) 23,24 : a Coulomb blockade island which exchanges electrons with a third terminal. The extraction of energy is mediated by the Coulomb repulsion of electrons in different islands, J. The superconducting gap, ∆, acts as an energy filter: At subgap voltages, only transitions that take energy from from the capacitor contribute to transport. A normal metal SET would unavoidably emit Joule heat at all voltages into the island. The manipulation of electrical and thermal flows in capacitively coupled normal metal or semiconductor systems has been recently demonstrated, including effects such as quantum dot heat engines 25-32 , autonomous Maxwell's demon operations 33,34 , thermal rectifiers 35-37 , memristors 38 , or single-electron current switches 39-41 . The interplay of the two relevant energy scales, J and ∆, in the cooling mechanism is investigated. Subgap transport in the SET is assisted by the Coulomb interaction, hence increasing the voltage window where cooling takes place. Hot electrons in the SET island are thus pumped over the gap of the supercond...

show abstract

Experimental realization of a Coulomb blockade refrigerator

Cited by 29 publications

References 37 publications

Proposal of a Realistic Stochastic Rotor Engine Based on Electron Shuttling

Proposal of a Realistic Stochastic Rotor Engine Based on Electron Shuttling

Nonlinear chiral refrigerators

Correlation-induced refrigeration with superconducting single-electron transistors

Contact Info

Product

Resources

About