Study of Extensive and Nonextensive Entropy of RbCl Quantum Well Qubit in an Asymmetric Gaussian Potential

Abstract In this paper, the effects of external electric, magnetic and non-resonant intense laser fields on the nonlinear optical rectification (NOR), second-harmonic (SH), and third-harmonic (TH) generation in a GaAs quantum well with asymmetrical Gaussian potential are theoretically investigated. Firstly, the energy eigenvalues and eigenfunctions of a single electron confined in the structure are obtained by using the diagonalization method within the framework of the effective-mass and parabolic band approaches. Then, using these energy eigenvalues and eigenfunctions, expressions derived within the compact density matrix approximation has been employed to calculate the coefficients of the nonlinear optical response in the structure. The obtained simulation results show that the influence of the external fields leads to significant changes in the coefficients of nonlinear optical rectification, second and third harmonic generation in the system. As a result, it has been seen that the amplitude and position of the peaks of nonlinear optical rectification, second and third harmonic coefficients can be controlled by changing the applied external fields.

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The influences of electric field and temperature on state energies of a strong-coupling polaron in an asymmetric Gaussian potential quantum well

Chinese Journal of Physics ◽

10.1016/j.cjph.2018.01.011 ◽

2018 ◽

Vol 56 (2) ◽

pp. 561-566 ◽

Cited By ~ 5

Author(s):

Xin-Jun Ma ◽

Jing-Lin Xiao

Keyword(s):

Electric Field ◽

Quantum Well ◽

Strong Coupling ◽

Gaussian Potential

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The effect of temperature on strong-coupling magnetopolaron in an asymmetrical Gaussian potential quantum well

International Journal of Modern Physics B ◽

10.1142/s0217979220501143 ◽

2020 ◽

Vol 34 (12) ◽

pp. 2050114

Author(s):

Xiu-Juan Miao ◽

Yong Sun ◽

Jing-Lin Xiao

Keyword(s):

Magnetic Field ◽

Quantum Well ◽

Strong Coupling ◽

Ground State Energy ◽

Ground State ◽

State Energy ◽

Cyclotron Frequency ◽

Operator Method ◽

Effect Of Temperature ◽

Gaussian Potential

The influences of temperature and cyclotron frequency of a magnetic field on the ground state energy and mean number of phonons (MNP) of strong-coupling magnetopolarons in an asymmetric Gaussian potential quantum well(AGPQW) are researched by employing the linear-combination operator method and the unitary transformation. It was demonstrated through the numerical calculations that the ground state energy and the MNP increase with higher magnetic field cyclotron frequencies and temperature. In addition, increasing of the barrier of asymmetric Gaussian potential (AGP) causes the ground state energy to decrease while increasing the MNP of magnetopolarons.

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