Julia Seti
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View article: The anholonomic frame and connection deformation method for constructing off-diagonal solutions in (modified) Einstein gravity and nonassociative geometric flows and Finsler–Lagrange–Hamilton theories
The anholonomic frame and connection deformation method for constructing off-diagonal solutions in (modified) Einstein gravity and nonassociative geometric flows and Finsler–Lagrange–Hamilton theories Open
This article is a status report on the anholonomic frame and connection deformation method, AFCDM, for constructing generic off-diagonal exact and parametric solutions in general relativity, GR, relativistic geometric flows and modified gr…
View article: Spectral properties of a broadband far infrared photodetector with a new design of active region
Spectral properties of a broadband far infrared photodetector with a new design of active region Open
A quantum theory of spectral parameters and oscillator strengths of quantum transitions in an active region, which contains cascades of wide quantum wells with a complicated potential profile is developed. A new spatial design of the casca…
View article: Renormalized spectrum of quasiparticle in limited number of states, strongly interacting with two-mode polarization phonons at T=0 K
Renormalized spectrum of quasiparticle in limited number of states, strongly interacting with two-mode polarization phonons at T=0 K Open
Within unitary transformed Hamiltonian of Fröhlich type, using the Green's functions method, exact renormalized energy spectrum of quasiparticle strongly interacting with two-mode polarization phonons is obtained at T=0 K in a model of the…
View article: Effect of Confined Phonons on Temperature Renormalization of Spectral Characteristics of Quantum Cascade Detector Operating in Far Infrared Range
Effect of Confined Phonons on Temperature Renormalization of Spectral Characteristics of Quantum Cascade Detector Operating in Far Infrared Range Open
У моделі прямокутних потенціалів та координатно-залежних ефективних мас з урахуванням непараболічності зони провідності для електронів та ізотропного діелектричного континууму для оптичних обмежених фононів розвинена теорія електрон-фононн…
View article: Peculiarities of electron spectrum renormalized by optical phonons in the cascade of quantum cascade detector
Peculiarities of electron spectrum renormalized by optical phonons in the cascade of quantum cascade detector Open
â îñòàòî÷íîìó âèãëÿäi 21 ñåðïíÿ 2021 ð.; ïðèéíÿòî äî äðóêó 30 ñåðïíÿ 2021 ð.; îïóáëiêîâàíî îíëàéí 10 âåðåñíÿ 2021 ð.)  îäíîôîíîííîìó íàáëèaeåííi íà îñíîâi ãàìiëüòîíiàíà åëåêòðîí-ôîíîííî¨ñèñòåìè â çîáðàaeåííi âòîðèííîãî êâàíòóâàííÿ çà âñiì…
View article: Modeling of optimized cascade of quantum cascade detector operating in far infrared range
Modeling of optimized cascade of quantum cascade detector operating in far infrared range Open
Using the theory for electron energy spectrum and oscillator strengths of inter-subband quantum transitions, developed in the model of position-dependent effective mass and rectangular potentials, the geometrical design for the compact cas…
View article: Generalized method of Feynman-Pines diagram technique in the theory of energy spectrum of two-level quasiparticle renormalized due to multi-phonon processes at cryogenic temperature
Generalized method of Feynman-Pines diagram technique in the theory of energy spectrum of two-level quasiparticle renormalized due to multi-phonon processes at cryogenic temperature Open
Theory of the spectrum of localized two-level quasi-particle renormalized due to interaction with polarization
\nphonons at cryogenic temperature is developed using the generalized method of Feynman-Pines diagram technique. Using the proce…
View article: Energy Spectrum of the System of Localized Two-level Quasi-particles Interacting with Polarization Phonons at Cryogenic Temperatures
Energy Spectrum of the System of Localized Two-level Quasi-particles Interacting with Polarization Phonons at Cryogenic Temperatures Open
Методом діаграмної техніки Фейнмана-Пайнса розраховано й досліджено перенормований взає- модією з поляризаційними фононами спектр двохрівневих локалізованих квазічастинок при кріоген- ній температурі. Показано, що зі зміною енергетичної ві…
View article: Transmitting Coefficient and Quasi-Stationary States of Electron in Symmetric Double-Barrier Nanostructure with Position-Dependent Potential and Effective Mass
Transmitting Coefficient and Quasi-Stationary States of Electron in Symmetric Double-Barrier Nanostructure with Position-Dependent Potential and Effective Mass Open
У моделі плавних просторово-залежних ефективної маси та потенціальної енергії електрона з їх лінійною залежністю від координати у приграничних шарах між ямами та бар’єрами відкритоїсиметричної двобар’єрної резонансно-тунельної наноструктур…
View article: Electron spectrum in open double-barrier nanostructure with smooth position-dependent potential and effective mass
Electron spectrum in open double-barrier nanostructure with smooth position-dependent potential and effective mass Open
ЕЛЕКТРОННИЙ СПЕКТР У ВIДКРИТIЙ ДВОБАР'ЄРНIЙ НАНОСИСТЕМIЗ ПЛАВНОЮ ПРОСТОРОВОЮ ЗАЛЕЖНIСТЮ ПОТЕНЦIАЛУ ТА ЕФЕКТИВНОЇ МАСИ
View article: Energy spectrum of localized quasiparticles renormalized by multi-phonon processes at finite temperature
Energy spectrum of localized quasiparticles renormalized by multi-phonon processes at finite temperature Open
The theory of renormalized energy spectrum of localized quasi-particle interacting with polarization phonons at
\nfinite temperature is developed within the Feynman-Pines diagram technique. The created computer program
\neffectively takes …
View article: Self-Consistent Calculation of Potential Profile of GaN/AlN Resonace Tunnelling Structures
Self-Consistent Calculation of Potential Profile of GaN/AlN Resonace Tunnelling Structures Open
For resonant tunneling structure with GaN – potential wells and AlN – potential barriers, calculation of internal fields caused by piezoelectric and spontaneous polarization was carried. In the model the effective mass of an electron and a…
View article: Photon- and phonon-assisted transport of electrons in resonant tunneling structures
Photon- and phonon-assisted transport of electrons in resonant tunneling structures Open
The quantum mechanical theory of photon-and phonon assisted tunneling of electrons through the open multilayered nanostructures being the cascades of quantum cascade detector and quantum cascade laser is developed.The theory of electronic …
View article: Properties of the Complete Phonon Spectrum of Anisotropic One- and Three-layer Wurtzite Nanostructures
Properties of the Complete Phonon Spectrum of Anisotropic One- and Three-layer Wurtzite Nanostructures Open
Within the Loudon dielectric continuum model, the theory of phonon spectrum is developed for the anisotropic wurtzite nanostructures: plane one-layer with binary and ternary components and three-layer with the same components. The energy s…
View article: Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models
Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models Open
Using the Feynman-Pines diagram technique, the energy spectrum of localized quasi-particles interacting with
\npolarization phonons is calculated and analyzed in the wide range of energies at the finite temperature of
\nthe system. It is e…
View article: Role of Interface Phonons in the Functioning of an Injectorless Quantum Cascade Laser
Role of Interface Phonons in the Functioning of an Injectorless Quantum Cascade Laser Open
A Hamiltonian for the electron-phonon system in the double-well resonant tunneling structure in the dc electric field has been obtained, by using the models of rectangular potential profile and effective mass for electrons and the dielectr…
View article: Two models for the cascade of quantum cascade detector operating in the near infra-red range
Two models for the cascade of quantum cascade detector operating in the near infra-red range Open
На основi аналiтичних i числових розрахункiв внутрiшнього електричного поля, викликаного спонтанною та п'єзоелектричною поляризацiями, дослiджено потенцiальний профiль зони провiдностi й
View article: Renormalized energy of ground and first excited state of Fröhlich polaron in the range of weak coupling
Renormalized energy of ground and first excited state of Fröhlich polaron in the range of weak coupling Open
Partial summing of infinite range of diagrams for the two-phonon mass\noperator of polaron described by Fr\\"{o}hlich Hamiltonian is performed using\nthe Feynman-Pines diagram technique. Renormalized spectral parameters of ground\nand firs…
View article: Dynamic Conductivity of Electrons and Electron-Phonon Interaction in Open Three-Well Nanostructures
Dynamic Conductivity of Electrons and Electron-Phonon Interaction in Open Three-Well Nanostructures Open
The theoretical description of electronic tunneling transport through the three-well nanostructure (In0.53Ga0.47As/In0.52Al0.48As),being an expanded active region of quantum cascade detector, is presented.Using the solution of the Schrödin…
View article: Theory of Dynamic Conductivity of Three-Barrier Resonance-Tullel Structure with Two-Photon Laser Transitions
Theory of Dynamic Conductivity of Three-Barrier Resonance-Tullel Structure with Two-Photon Laser Transitions Open
Within the approximation of effective mass and rectangular potential barriers for the electron and using the obtained solutions of complete Schrodinger equation, the theory of dynamic conductivity for three-barrier resonant tunneling struc…
View article: The electron spectrum renormalized due to confined phonons in a two-well plane nanostructure driven by the constant electric field at an arbitrary temperature
The electron spectrum renormalized due to confined phonons in a two-well plane nanostructure driven by the constant electric field at an arbitrary temperature Open
ПЕРЕНОРМУВАННЯ ЕЛЕКТРОННОГО СПЕКТРА ОБМЕЖЕНИМИ ФОНОНАМИ У ДВОЯМНIЙ ПЛОСКIЙ НАНОСТРУКТУРI В ПОСТIЙНОМУЕЛЕКТРИЧНОМУ ПОЛI ЗА ДОВIЛЬНОЇ ТЕМПЕРАТУРИ