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The interplay between the Kondo effect and the inter-dot magnetic interaction in a coupled-dot system is studied. An exact result for the transport properties at zero temperature is obtained by diagonalizing a cluster, composed by the…

Strongly Correlated Electrons · Physics 2009-10-31 C. A. Büsser , E. V. Anda , A. L Lima , Maria A. Davidovich , G. Chiappe

We study the sub-gap spectrum and the transport properties of a double quantum dot coupled to metallic and superconducting leads. The coupling of both quantum dots to the superconducting lead induces a non-local pairing in both quantum dots…

Mesoscale and Nanoscale Physics · Physics 2020-10-28 G. Górski , K. Kucab

We study an intermediate quantum coherent-incoherent charge transport mechanism in metal-molecule-metal junctions using B\"uttiker's probe technique. This tool allows us to include incoherent effects in a controlled manner, and thus to…

Mesoscale and Nanoscale Physics · Physics 2017-04-12 Hyehwang Kim , Michael Kilgour , Dvira Segal

The transport properties of a conduction junction model characterized by two mutually coupled channels that strongly differ in their couplings to the leads are investigated. Models of this type describe molecular redox junctions (where a…

Mesoscale and Nanoscale Physics · Physics 2015-06-16 Alexander J. White , Agostino Migliore , Michael Galperin , Abraham Nitzan

We demonstrate coherent dynamics of quantized magnetic fluxes in a superconducting loop with a weak link - a nanobridge patterned from the same thin NbN film as the loop. The bridge is a short rounded shape constriction, close to 10 nm long…

Mesoscale and Nanoscale Physics · Physics 2016-11-30 J. T. Peltonen , Z. H. Peng , Yu. P. Korneeva , B. M. Voronov , A. A. Korneev , A. V. Semenov , G. N. Gol'tsman , J. S. Tsai , O. V. Astafiev

We study the dynamics of quantum coherence and quantum correlations in two semiconductor double-dot molecules separated by a distance and indirectly coupled via a transmission line resonator. Dominant dissipation processes are considered.…

Quantum Physics · Physics 2012-05-08 Pei Pei , Chong Li , Jia-Sen Jin , He-Shan Song

We investigate non-equilibrium transport properties of a quantum dot in the Coulomb blockade regime under the condition of negligible inelastic scattering during the dwelling time of the electrons in the dot. Using the quantum kinetic…

Mesoscale and Nanoscale Physics · Physics 2023-11-17 George McArdle , Rose Davies , Igor V. Lerner , Igor V. Yurkevich

We investigate transient transport of electrons through a single-quantum-dot controlled by a plunger gate. The dot is embedded in a finite wire that is weakly coupled to leads and strongly coupled to a single cavity photon mode. A…

Mesoscale and Nanoscale Physics · Physics 2013-11-15 Nzar Rauf Abdullah , Chi-Shung Tang , Andrei Manolescu , Vidar Gudmundsson

We use time-resolved charge detection techniques to probe virtual tunneling processes in a double quantum dot. The process involves an energetically forbidden state separated by an energy $\delta$ from the Fermi energy in the leads. The…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 S. Gustavsson , M. Studer , R. Leturcq , T. Ihn , K. Ensslin , D. C. Driscoll , A. C. Gossard

Doped organic semiconductors are critical to emerging device applications, including thermoelectrics, bioelectronics, and neuromorphic computing devices. It is commonly assumed that low conductivities in these materials result primarily…

Electron shuttling is one of the current avenues being pursued to scale semiconductor quantum dot-based spin qubits. Adiabatic spin qubit transfer along a chain of tunnel-coupled quantum dots is one of the possible schemes. In this scheme,…

Mesoscale and Nanoscale Physics · Physics 2025-05-13 Jan A. Krzywda , Łukasz Cywiński

In this paper, a study is presented on the charge transport in n-type doped semiconductor 6H-SiC (in both transient and steady state) using a nonequilibrium quantum kinetic theory derived from the method of nonequilibrium statistical…

Materials Science · Physics 2021-10-05 Ricardo Tadeu Ferracioli , Clóves Gonçalves Rodrigues , Roberto Luzzi

We report electron transport measurements of a silicon double dot formed in multi-gated metal-oxide-semiconductor structures with a 15-nm-thick silicon-on-insulator layer. Tunable tunnel coupling enables us to observe an excitation spectrum…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 H. W. Liu , T. Fujisawa , H. Inokawa , Y. Ono , A. Fujiwara , Y. Hirayama

Quantum interference in nano-electronic devices could lead to reduced-energy computing and efficient thermoelectric energy harvesting. When devices are shrunk down to the molecular level it is still unclear to what extent electron…

Detecting coherence transfer in complex quantum networks can be challenging due to uncharacterized experimental conditions and limited system access. Here, we use static and dynamic coherence features to introduce a nonlinear criterion for…

We study the electron transport through a system of two low-capacitance metal islands connected in series between two electrodes. The work is motivated in part by experiments on semiconducting double-dots, which show intriguing effects…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 Teemu Pohjola , Jürgen König , Herbert Schoeller , Gerd Schön

Electric control of individual atoms or molecules in a solid-state system offers a promising way to bring quantum mechanical functionalities into electronics. This idea has recently come into the reach of the established domain of silicon…

Mesoscale and Nanoscale Physics · Physics 2012-07-10 E. Dupont-Ferrier , B. Roche , B. Voisin , X. Jehl , R. Wacquez , M. Vinet , M. Sanquer , S. De Franceschi

Quantum transport properties through some multilevel quantum dots sandwiched between two metallic contacts are investigated by the use of Green's function technique. Here we do parametric calculations, based on the tight-binding model, to…

Mesoscale and Nanoscale Physics · Physics 2009-11-06 Santanu K. Maiti

We investigate experimentally the quantum coherence of an electronic two-level system in a double quantum dot under continuous charge detection. The charge-state of the two-level system is monitored by a capacitively coupled single quantum…

We investigate coherent transport in Si:MOSFETs with nominal gate lengths 50 to 100nm and various widths at very low temperature. Independent of the geometry, localized states appear when G=e^{2}/h and transport is dominated by resonant…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 M. Sanquer , M. Specht , L. Ghenim , S. Deleonibus , G. Guegan