Effect of temperature on vibrational frequency of strong coupling polaron in asymmetric quantum dot

2014 ◽  
Vol 88 (8) ◽  
pp. 777-780 ◽  
Author(s):  
X. J. Miao ◽  
Y. Sun ◽  
J. L. Xiao
Keyword(s):  
Quantum Dot ◽  
Strong Coupling ◽  
Vibrational Frequency ◽  
Effect Of Temperature ◽  
Asymmetric Quantum Dot ◽  
Asymmetric Quantum

Stability and coherence of strong-coupling magneto-bipolaron in asymmetric quantum dot under laser field effect

2018 ◽  
Vol 382 (48) ◽  
pp. 3490-3499 ◽  
Author(s):  
M.F.C. Fobasso ◽  
A.J. Fotue ◽  
S.C. Kenfack ◽  
G.N. Bawe ◽  
D. Akay ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Strong Coupling ◽  
Laser Field ◽  
Field Effect ◽  
Asymmetric Quantum Dot ◽  
Asymmetric Quantum

GROUND STATE LIFETIME OF STRONG-COUPLING MAGNETOPOLARON IN AN ASYMMETRIC QUANTUM DOT

2009 ◽  
Vol 23 (12) ◽  
pp. 1547-1555 ◽  
Author(s):  
ZHIXIN LI ◽  
JINGLIN XIAO
Keyword(s):  
Quantum Dot ◽  
Strong Coupling ◽  
Ground State Energy ◽  
Vibration Frequency ◽  
Ground State ◽  
Coupling Strength ◽  
State Energy ◽  
External Temperature ◽  
Asymmetric Quantum Dot ◽  
Asymmetric Quantum

The ground state lifetime of a magnetopolaron was investigated with electron–LO-phonon strong coupling in an asymmetric quantum dot using the linear combination operator and unitary transformation methods. Quantum transition, which cause changes of the magnetopolaron lifetime, occurs in the quantum system due to electron–phonon interaction and the influence of external temperature, that is, the magnetopolaron leaps from the ground state to the first excited state after absorbing a LO-phonon. The expressions of the ground state lifetime of the magnetopolaron as a function of the ground state energy, the transverse and longitudinal confinement lengths of quantum dot, the electron–phonon coupling strength, the cyclotron vibration frequency and the external temperature were obtained. Numerical calculations have been performed and the results show that the ground state lifetime of the magnetopolaron increases with increasing the ground state energy and the cyclotron vibration frequency, and decreases with increasing the transverse and longitudinal confinement lengths of the quantum dot, the coupling strength and the external temperature.

Asymmetric Quantum-Dot Pixelation for Color-Converted White Balance

ACS Photonics ◽  
2021 ◽  
Author(s):  
Enguo Chen ◽  
Jianyao Lin ◽  
Tao Yang ◽  
Yu Chen ◽  
Xiang Zhang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
White Balance ◽  
Asymmetric Quantum Dot ◽  
Asymmetric Quantum

OPTICAL PHONON EFFECT IN AN ASYMMETRIC QUANTUM DOT QUBIT

2012 ◽  
Vol 10 (07) ◽  
pp. 1250077 ◽  
Author(s):  
ZHAO-HUA DING ◽  
YONG SUN ◽  
JING-LIN XIAO
Keyword(s):  
Quantum Dot ◽  
Excited States ◽  
Oscillation Period ◽  
Present System ◽  
Superposition State ◽  
Strongly Coupled ◽  
Asymmetric Quantum Dot ◽  
Asymmetric Quantum ◽  
Electron Phonon Coupling ◽  
Increasing Function

We investigate the eigenenergies and the eigenfunctions of the ground and the first excited states of an electron, which is strongly coupled to LO-phonon in an asymmetric quantum dot (QD) by using variational method of Pekar type. The present system may be used as a two-level qubit. When the electron is in the superposition state of the ground and the first excited states, the probability density of the electron oscillates in the QD with a certain period. It is found that the oscillation period is an increasing function of the transverse and the longitudinal effective confinement lengths of the QD, whereas it is a decreasing one of the electron–phonon coupling strength.

Excitation transfer in self-organized asymmetric quantum dot pairs

1998 ◽  
Vol 58 (16) ◽  
pp. R10151-R10154 ◽  
Author(s):  
R. Heitz ◽  
I. Mukhametzhanov ◽  
P. Chen ◽  
A. Madhukar
Keyword(s):  
Quantum Dot ◽  
Excitation Transfer ◽  
Self Organized ◽  
Asymmetric Quantum Dot ◽  
Asymmetric Quantum

Effect of temperature on magnetic susceptibility and thermodynamic properties of an asymmetric quantum dot in tilted magnetic field

2015 ◽  
Vol 29 (23) ◽  
pp. 1550127 ◽  
Author(s):  
R. Khordad
Keyword(s):  
Magnetic Field ◽  
Magnetic Susceptibility ◽  
Quantum Dot ◽  
Specific Heat ◽  
Energy Levels ◽  
Effect Of Temperature ◽  
Magnetic Field Direction ◽  
Asymmetric Quantum ◽  
Gaas Quantum Dot ◽  
The Magnetic Field

In this paper, the specific heat, entropy and magnetic susceptibility of an asymmetric GaAs quantum dot (QD) are studied under the influence of temperature and a tilted external magnetic field. We first calculate the analytical wave functions and energy levels using a transformation to simplify the Hamiltonian of the system. Then, we obtain the analytical expressions for specific heat, entropy and magnetic susceptibility as the function of temperature, magnetic field and its direction for various anisotropy of the system. According to the results obtained from the present work, we find that (i) the specific heat and entropy are decreased when the magnetic field increases. (ii) When anisotropy is increased, the specific heat and entropy decrease. (iii) At large magnetic fields, the anisotropy has not important effect on specific heat and entropy. In briefly, the magnetic field, magnetic field direction and anisotropy play important roles in the specific heat, entropy and magnetic susceptibility of an asymmetric QD.

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