scholarly journals Two-Electron Quantum Dots in Magnetic Field

1997 ◽  
Vol 92 (4) ◽  
pp. 695-698
Author(s):  
J. Adamowski ◽  
B. Spisak
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Electron Quantum

ENTANGLEMENT IN TWO VERTICALLY COUPLED IDENTICAL SINGLE-ELECTRON QUANTUM DOTS

2002 ◽  
Vol 16 (23n24) ◽  
pp. 907-913 ◽  
Author(s):  
ZHAN-JUN ZHANG ◽  
HAO-XUE QIAO ◽  
BAI-WEN LI
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
External Magnetic Field ◽  
Quantum Dot ◽  
Single Electron ◽  
Von Neumann ◽  
Electron Quantum

The evolutions of the von Neumann entropies of the low-lying states in two vertically coupled identical single-electron quantum dot systems with increasing magnetic field and inter-dot separation have been investigated. We show that both the external magnetic field and the inter-dot separation can induce the transition of the entropy of the system. Additionally, a suspicion (that is, the higher the excitation, the larger entropy) has been clarified and proven to be incorrect.

EFFECTS OF CONFINEMENT POTENTIAL ON FEW-ELECTRON QUANTUM DOTS IN MAGNETIC FIELD

2010 ◽  
Vol 24 (16) ◽  
pp. 1791-1797
Author(s):  
XIAO-ZHU LI ◽  
YI-MIN LIU
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Regular Polygon ◽  
Ground States ◽  
Energy Spectra ◽  
State Transitions ◽  
Confinement Potential ◽  
Electron Quantum ◽  
Electronic Configurations ◽  
Symmetry Effect

Effects of confinement potential hω0 on two- and four-electron quantum dots (QDs) subjected to an external magnetic field B are theoretically investigated. The energy spectra of low-lying states of the QDs as a function of B are obtained. The (L0, S0) phase diagrams are presented, indicating how the ground-state transitions of the QDs vary with B and hω0, where L0 denotes the total angular momentum and S0 the total spin of the ground states. Arising from symmetry effect, L0 and S0 are matched with each other in a special way. Density functions are calculated, and information on electronic configurations is extracted from them. The ground states are found to have a regular-polygon configuration.

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