Optical and electronic properties of a singly ionized double donor confined in coupled quantum dot-rings

Hernández, N.; López-Doria, R. A.; Fulla, M.R.

doi:10.1016/j.physe.2023.115736

Cited by 8 publications

(3 citation statements)

References 52 publications

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“…Furthermore, we explore the impact of deformations on the electronic effective mass on these quantities, that is, we consider electrons in GaAs/Ga 1−x Al x As [19]. Effects of hydrostatic pressure, temperature and aluminum concentration warrant attention due to pronounced modifications in physical quantities in electronic systems [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Effects of Impurities and Deformations on Electronic Effective Mass in Quantum Revival Time within the Infinite Square Well

Filgueiras,

Borges,

Rojas

2024

Universe

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Quantum revival phenomena, wherein the wave function of a quantum system periodically returns to its initial state after evolving in time, are investigated in this study. Focusing on electrons confined within a quantum box with an impurity, both weak- and strong-coupling regimes are explored, revealing intricate relationships between impurity parameters and temporal dynamics. This investigation considers the influence of impurity position, impurity strength, and external factors such as aluminum concentration, temperature and hydrostatic pressure on classical periods and revival times. Through analytical derivations and graphical analyses, this study elucidates the sensitivity of quantum revivals to these parameters, providing valuable insights into the fundamental aspects of quantum mechanics. While no specific physical applications are discussed, the findings offer implications for quantum heat engines and other quantum-based technologies, emphasizing the importance of understanding quantum revivals in confined quantum systems.

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Section: Introductionmentioning

confidence: 99%

Effects of Impurities and Deformations on Electronic Effective Mass in Quantum Revival Time within the Infinite Square Well

Filgueiras,

Borges,

Rojas

2024

Universe

View full text Add to dashboard Cite

show abstract

“…Furthermore, we explore the impact of deformations on the electronic effective mass on these quantities, that is, we consider electrons in a GaAs/Ga 1−x Al x As [18]. Effects of hydrostatic pressure, temperature, and aluminum concentration warrant attention due to pronounced modifications in physical quantities in electronic systems [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effects of Impurities and Deformations on Electronic Effective Mass in Quantum Revival Time within the Infinite Square Well

Filgueiras,

Borges,

Rojas

2024

Preprint

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Quantum revival phenomena, wherein the wave function of a quantum system periodically returns to its initial state after evolving in time, are investigated in this study. Focusing on electrons confined within a quantum box with an impurity, both weak and strong coupling regimes are explored, revealing intricate relationships between impurity parameters and temporal dynamics. The investigation considers the influence of impurity position, impurity strength, and external factors such as aluminum concentration, temperature, and hydrostatic pressure on classical periods and revival times. Through analytical derivations and graphical analyses, the study elucidates the sensitivity of quantum revivals to these parameters, providing valuable insights into the fundamental aspects of quantum mechanics. While no specific physical applications are discussed, the findings offer implications for quantum heat engines and other quantum-based technologies, emphasizing the importance of understanding quantum revivals in confined quantum systems.

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“…A structure formed by coupled quantum dot-ring was modeled, and optical properties with changes in pressure, temperature, and in the presence of electric and magnetic fields were simulated in [4]. A fundamental part of their article was the modeling of a quantum ring-dot system taken from an experimental work [5], whose synthesis was performed using droplet epitaxy, and profile images were built from the measurements generated via Atomic Force Microscopy (AFM).…”

Section: Introductionmentioning

confidence: 99%

Electric and Magnetic Fields Effects in Vertically Coupled GaAs/AlxGa1−xAs Conical Quantum Dots

et al. 2023

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Vertically coupled quantum dots have emerged as promising structures for various applications such as single photon sources, entangled quantum pairs, quantum computation, and quantum cryptography. We start with a structure composed of two vertically coupled GaAs conical quantum dots surrounded by AlxGa1−x, and the effects of the applied electric and magnetic fields on the energies are evaluated using the finite element method. In addition, the effects are evaluated by including the presence of a shallow-donor impurity. The electron binding energy behavior is analyzed, and the effects on the photoionization cross-section are studied. Calculations are carried out in the effective mass and parabolic conduction band approximations. Our results show a notable dependence on the electric and magnetic fields applied to the photoionization cross-section. In general, it has been observed that both the electric and magnetic fields are useful parameters for inducing blueshifts of the resonant photoionization cross-section structure, which is accompanied by a drop in its magnitude.

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Optical and electronic properties of a singly ionized double donor confined in coupled quantum dot-rings

Cited by 8 publications

References 52 publications

Effects of Impurities and Deformations on Electronic Effective Mass in Quantum Revival Time within the Infinite Square Well

Effects of Impurities and Deformations on Electronic Effective Mass in Quantum Revival Time within the Infinite Square Well

Effects of Impurities and Deformations on Electronic Effective Mass in Quantum Revival Time within the Infinite Square Well

Electric and Magnetic Fields Effects in Vertically Coupled GaAs/AlxGa1−xAs Conical Quantum Dots

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