Application of entropies to the study of the decoherence of magnetopolaron in 0-D nanosystem

Tiotsop, M.; Fotué, A. J.; Fotsin, Hilaire Bertrand; Fai, Lukong Cornelius

doi:10.1007/s11082-018-1630-x

Cited by 4 publications

(1 citation statement)

References 36 publications

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“…Scattering of electrons by phonons, particularly via polar LO modes, is one of the most important energy relaxation processes in low-dimensional systems (Alcalde and Weber, 2000;Bai et al, 2019;Quoc and Dinh, 2019). For example, they play a significant role in decoherence in quantum computing (Fotue et al, 2015;Khordad and Ghanbari, 2017;Tiotsop et al, 2018), in promoting stable hot carrier population in solar cells (Garg and Sellers, 2020) and in photoluminescence (Ding et al, 2017). Even though phonons can be responsible for the decoherence of qubits (Kornich et al, 2018), there is some indication that they may also play a positive role in the quantum information industry.…”

Section: Introductionmentioning

confidence: 99%

Electron-LO-phonon Intrasubband Scattering Rates in a Hollow Cylinder Under the Influence of a Uniform Axial Applied Magnetic Field

Masale

Tshipa

2021

Preprint

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Scattering rates arising from the interactions of electrons with bulk longitudinal optical (LO) phonon modes in a hollow cylinder are calculated as functions of the inner radius and the uniform axial applied magnetic field. Now, the specific nature of electron-phonon interactions mainly depends on the character of the energy spectrum of electrons. As is well known, in cylindrical quantum wires, the application of a parallel magnetic field lifts the double degeneracy of the non-zero azimuthal quantum number states; m≠0; irrespective of all electron's radial quantum number l states. In fact, this Zeeman splitting is such that the m < 0 electron's energy subbands initially decrease with the increase of the parallel applied magnetic field. In a solid cylinder, the lowest-order; {l = 1; m = 0} subband is always the ground state. In a hollow cylinder, however, as the axial applied magnetic field is increased, the electron's energy subbands take turns at becoming the ground state; following the sequence {m=0,-1,-2...-N} of azimuthal quantum numbers. Furthermore, in a hollow cylinder, in general, the electron's energy separations between any two subbands are less than the LO phonon energy except for exceptionally high magnetic fields, and some highest-order quantum number states. In view of this, the discussion of the energy relaxation here is focused mainly on intrasubband scattering of electrons and only within the lowest-order {l = 1; m = 0} electron's energy subband. The intrasubband scattering rates are found to be characterized by shallow minima in their variations with the inner radius, again, for a fixed outer radius. This feature is a consequence of a balance between two seemingly conflicting effects of the electron's confinement by the inner and outer walls of the hollow cylinder. First; increased confinement of the charge carriers generally leads to the enhancement of the rates. Second; the presence of a hole in a hollow cylinder leads to a significant suppression of the scattering rates. The intrasubband scattering rates also show a somewhat parabolic increase in their variations with the applied magnetic field; an increase which is more pronounced in a relatively thick hollow cylinder.

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Section: Introductionmentioning

confidence: 99%

Electron-LO-phonon Intrasubband Scattering Rates in a Hollow Cylinder Under the Influence of a Uniform Axial Applied Magnetic Field

Masale

Tshipa

2021

Preprint

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Electron-LO-phonon intrasubband scattering rates in a hollow cylinder under the influence of a uniform axial applied magnetic field

Masale

Tshipa

2021

Opt Quant Electron

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Gaussian entropy and decoherence of qubit in hydrogenic impurity-center semiconductor quantum dot by confined spherical Gaussian potential

Xin

2024

Opt Quant Electron

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Application of entropies to the study of the decoherence of magnetopolaron in 0-D nanosystem

Cited by 4 publications

References 36 publications

Electron-LO-phonon Intrasubband Scattering Rates in a Hollow Cylinder Under the Influence of a Uniform Axial Applied Magnetic Field

Electron-LO-phonon Intrasubband Scattering Rates in a Hollow Cylinder Under the Influence of a Uniform Axial Applied Magnetic Field

Electron-LO-phonon intrasubband scattering rates in a hollow cylinder under the influence of a uniform axial applied magnetic field

Gaussian entropy and decoherence of qubit in hydrogenic impurity-center semiconductor quantum dot by confined spherical Gaussian potential

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