Quantum-dot–insulator–superconductor junctions coupled to a microwave resonator
ORAL
Abstract
Quantum dots are finding more and more important applications in the modern electronics. Recent works related to the electron tunneling between a quantum dot and superconducting lead [1,2] inspired us to theoretically study the system consisting of quantum-dot–insulator–superconductor (QIS) junctions coupled to the microwave resonator. For this purpose, we adapted the theory developed before for the so-called quantum-circuit refrigerator [3-6], which is based on normal-metal–insulator–superconductor junctions. We demonstrate that the current running through the QIS junctions can lead to a negative damping rate at the microwave resonator and discuss the possibility to use such a system as a narrow-band amplifier and a microwave laser.
[1] L. E. Bruhat, et al, Phys. Rev. X6,285021014 (2016).
[2] D. van Zanten, et al, Phys. Rev. Lett.116, 166801 (2016).
[3] M. Silveri, et al, Phys. Rev. B96, 094524 (2017).
[4] K. Y. Tan, et al, Nat. Commun.8,15189 (2017).
[5] M. Silveri, et al, Nat. Phys. (2019).
[6] V. A. Sevriuk, et al, Applied Physics Letters115, 082601 (2019).
[1] L. E. Bruhat, et al, Phys. Rev. X6,285021014 (2016).
[2] D. van Zanten, et al, Phys. Rev. Lett.116, 166801 (2016).
[3] M. Silveri, et al, Phys. Rev. B96, 094524 (2017).
[4] K. Y. Tan, et al, Nat. Commun.8,15189 (2017).
[5] M. Silveri, et al, Nat. Phys. (2019).
[6] V. A. Sevriuk, et al, Applied Physics Letters115, 082601 (2019).
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Presenters
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Vasilii Sevriuk
IQM Finland Oy, QCD Labs, QTF Center of Excellence, Department of Applied Physics, Aalto University, QCD Labs, Aalto University
Authors
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Vasilii Sevriuk
IQM Finland Oy, QCD Labs, QTF Center of Excellence, Department of Applied Physics, Aalto University, QCD Labs, Aalto University
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Matti Silveri
Research Unit of Nano and Molecular Systems, University of Oulu, QCD Labs, Aalto University, Department of Applied Physics, Aalto University
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Mikko Mottonen
IQM Finland Oy, QCD Labs, QTF Center of Excellence, Department of Applied Physics, Aalto University, QCD Labs, QTF Centre of Excellence, Department of Applied Physics, Aalto University, Aalto University, QCD Labs, Aalto University, Department of Applied Physics, Aalto University