scholarly journals Magnetic-field-induced charge redistribution in disordered graphene double quantum dots

2015 ◽  
Vol 92 (15) ◽  
Author(s):  
K. L. Chiu ◽  
M. R. Connolly ◽  
A. Cresti ◽  
J. P. Griffiths ◽  
G. A. C. Jones ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Double Quantum ◽  
Charge Redistribution ◽  
Double Quantum Dots ◽  
Induced Charge

scholarly journals Magnetic field evolution of spin blockade in Ge/Si nanowire double quantum dots

2017 ◽  
Vol 95 (15) ◽  
Author(s):  
A. Zarassi ◽  
Z. Su ◽  
J. Danon ◽  
J. Schwenderling ◽  
M. Hocevar ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Double Quantum ◽  
Si Nanowire ◽  
Double Quantum Dots ◽  
Field Evolution ◽  
Spin Blockade

Modulation of magnetotransport in asymmetrically coupled double quantum dot system

2016 ◽  
Vol 30 (22) ◽  
pp. 1650266 ◽  
Author(s):  
Yan-Hua Liao ◽  
Jin Huang ◽  
Wei-Zhong Wang
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Quantum Dots ◽  
Energy Level ◽  
Quantum Dot ◽  
Spin Polarization ◽  
Quantum Phase Transition ◽  
Double Quantum ◽  
Double Quantum Dot ◽  
Double Quantum Dots

We study the transport properties in double quantum dots asymmetrically coupled to leads in magnetic field. We focus on the situation in which the second dot (QD2) couples with the leads with a weak hybridization function. The results shows that by tuning the energy level [Formula: see text] of QD2 one can control the conductance and its spin polarization of the system. In the absence of magnetic field [Formula: see text], with increasing [Formula: see text], the conductance shows a dip structure. This behavior of conductance results from a continuous triplet–doublet quantum phase transition. In the presence of magnetic field [Formula: see text], we obtain a perfect spin filtering with a fully-polarized conductance of up-spin or down-spin.

Quantum Double Dot as Quantum Computer Unit

2016 ◽  
pp. 3500-3506
Author(s):  
A. M. Khalaf ◽  
Z. Ali ◽  
Sh. Abdelfattah ◽  
A. M. Selim
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
External Magnetic Field ◽  
Quantum Computer ◽  
Double Quantum ◽  
Quantum Double ◽  
Molecular Physics ◽  
Double Quantum Dots ◽  
Magnetization Behavior ◽  
Computer Unit

In this work, we have investigated the exchange interaction of two electrons in double lateral quantum dot (which is the base of quantum gate) under effect of external magnetic field, electric field and inter dot distance between double dots. From similarity between double quantum dots and molecule, we have used molecular physics approaches (Hitler – London and Hund – Mullikan approximation method) to investigate our system. We also show the magnetization behavior as function of magnetic field.

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