Zero bias maximum of differential conductance in coupled quantum dots: The effect of interdot Coulomb interaction

2010 ◽  
Vol 405 (20) ◽  
pp. 4323-4329 ◽  
Author(s):  
Gagan Rajput ◽  
S. Chand ◽  
P.K. Ahluwalia ◽  
K.C. Sharma
Keyword(s):  
Quantum Dots ◽  
Coulomb Interaction ◽  
Differential Conductance ◽  
Coupled Quantum Dots ◽  
Zero Bias

Coulomb-interaction driven anomaly in the Stark effect for an exciton in vertically coupled quantum dots

2005 ◽  
Vol 112 (1-4) ◽  
pp. 122-126 ◽  
Author(s):  
T. Chwiej ◽  
S. Bednarek ◽  
J. Adamowski ◽  
B. Szafran ◽  
F.M. Peeters
Keyword(s):  
Quantum Dots ◽  
Coulomb Interaction ◽  
Stark Effect ◽  
Coupled Quantum Dots

scholarly journals Transport signatures of an Andreev molecule in a quantum dot–superconductor–quantum dot setup

2019 ◽  
Vol 10 ◽  
pp. 363-378 ◽  
Author(s):  
Zoltán Scherübl ◽  
András Pályi ◽  
Szabolcs Csonka
Keyword(s):  
Quantum Dots ◽  
Quantum Information ◽  
Quantum Dot ◽  
Cooper Pair ◽  
Differential Conductance ◽  
Zero Bias ◽  
Local Mechanism ◽  
Special Cases ◽  
Non Local ◽  
Hybrid Devices

Hybrid devices combining quantum dots with superconductors are important building blocks of conventional and topological quantum-information experiments. A requirement for the success of such experiments is to understand the various tunneling-induced non-local interaction mechanisms that are present in the devices, namely crossed Andreev reflection, elastic co-tunneling, and direct interdot tunneling. Here, we provide a theoretical study of a simple device that consists of two quantum dots and a superconductor tunnel-coupled to the dots, often called a Cooper-pair splitter. We study the three special cases where one of the three non-local mechanisms dominates, and calculate measurable ground-state properties, as well as the zero-bias and finite-bias differential conductance characterizing electron transport through this device. We describe how each non-local mechanism controls the measurable quantities, and thereby find experimental fingerprints that allow one to identify and quantify the dominant non-local mechanism using experimental data. Finally, we study the triplet blockade effect and the associated negative differential conductance in the Cooper-pair splitter, and show that they can arise regardless of the nature of the dominant non-local coupling mechanism. Our results should facilitate the characterization of hybrid devices, and their optimization for various quantum-information-related experiments and applications.

Coulomb interaction in asymmetric triple-coupled quantum dots

2004 ◽  
Vol 19 (4) ◽  
pp. S409-S411 ◽  
Author(s):  
H Sasakura ◽  
S Adachi ◽  
S Muto ◽  
T Usuki ◽  
M Takatsu
Keyword(s):  
Quantum Dots ◽  
Coulomb Interaction ◽  
Coupled Quantum Dots
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