Subgap dynamics of double quantum dot coupled between superconducting and normal leads

Autor: R. Taranko, B. Baran, Tadeusz Domański
Rok vydání: 2021
Předmět:
Science
FOS: Physical sciences
02 engineering and technology
01 natural sciences
Article
Superconducting properties and materials
Superconductivity (cond-mat.supr-con)
Condensed Matter - Strongly Correlated Electrons
Condensed Matter::Superconductivity
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
0103 physical sciences
010306 general physics
Characteristic energy
Superconductivity
Physics
Multidisciplinary
Strongly Correlated Electrons (cond-mat.str-el)
Condensed Matter - Mesoscale and Nanoscale Physics
Condensed matter physics
Quantum dots
Condensed Matter - Superconductivity
Charge (physics)
Biasing
Heterojunction
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
021001 nanoscience & nanotechnology
Harmonics
Qubit
Superconducting devices
Quasiparticle
Medicine
0210 nano-technology
Zdroj: Scientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
Scientific Reports
ISSN: 2045-2322
DOI: 10.1038/s41598-021-90080-2
Popis: Dynamical processes induced by the external time-dependent fields can provide valuable insight into the characteristic energy scales of a given physical system. We investigate them here in a nanoscopic heterostructure, consisting of the double quantum dot coupled in series to the superconducting and the metallic reservoirs, analyzing its response to (i)~abrupt bias voltage applied across the junction, (ii) sudden change of the energy levels, and imposed by (iii)~their periodic driving. We explore subgap properties of this setup which are strictly related to the in-gap quasiparticles and discuss their signatures manifested in the time-dependent charge currents. The characteristic multi-mode oscillations, their beating patters and photon-assisted harmonics reveal a rich spectrum of dynamical features that might be important for designing the superconducting qubits.
16 pages, 13 figures
Databáze: OpenAIRE
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