Electric field control of radiative heat transfer in a superconducting circuit

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-08-28
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Language
en
Pages
6
1-6
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Nature Communications, Volume 11, issue 1
Abstract
Heat is detrimental for the operation of quantum systems, yet it fundamentally behaves according to quantum mechanics, being phase coherent and universally quantum-limited regardless of its carriers. Due to their robustness, superconducting circuits integrating dissipative elements are ideal candidates to emulate many-body phenomena in quantum heat transport, hitherto scarcely explored experimentally. However, their ability to tackle the underlying full physical richness is severely hindered by the exclusive use of a magnetic flux as a control parameter and requires complementary approaches. Here, we introduce a dual, magnetic field-free circuit where charge quantization in a superconducting island enables thorough electric field control. We thus tune the thermal conductance, close to its quantum limit, of a single photonic channel between two mesoscopic reservoirs. We observe heat flow oscillations originating from the competition between Cooper-pair tunnelling and Coulomb repulsion in the island, well captured by a simple model. Our results highlight the consequences of charge-phase conjugation on heat transport, with promising applications in thermal management of quantum devices and design of microbolometers.
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Maillet, O, Subero, D, Peltonen, J T, Golubev, D S & Pekola, J P 2020, ' Electric field control of radiative heat transfer in a superconducting circuit ', Nature Communications, vol. 11, no. 1, 4326, pp. 1-6 . https://doi.org/10.1038/s41467-020-18163-8