Article
Physics, Multidisciplinary
Greger Torgrimsson
Summary: In this study, a new approach was proposed to calculate the momentum expectation value of an electron in a high-intensity laser, considering multiple photon emissions and loops. By finding a recursive formula and expressing it as an integro-differential equation, the O(alpha(n)) term was obtained from O(alpha(n-1)). In the classical limit, the solution to the Landau-Lifshitz equation was derived to all orders by resumming both the energy expansion and alpha expansion for spin-dependent quantum radiation reaction.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
T. Niermann, L. Niermann, M. Narodovitch, M. Lehmann
Summary: In this study, two methods for estimating electric field strength across semiconductor heterostructure quantum wells were thoroughly investigated. Ways to incorporate polarization effects into combined strain and multislice simulations were developed. It was found that errors estimated from detection noise of single measurements mostly underestimate the true error.
Article
Chemistry, Multidisciplinary
Esin Kasapoglu, Melike Behiye Yucel, Carlos A. Duque
Summary: In this study, we investigated the optical properties of electrons in symmetrical and asymmetrical double quantum wells under an applied magnetic field. The calculations were carried out using the effective mass and parabolic band approximations. By diagonalization, we obtained the eigenvalues and eigenfunctions of the confined electron. The linear and third-order non-linear optical absorption and refractive index coefficients were calculated using a two-level density matrix expansion. The proposed potential model is valuable for simulating and controlling the optical and electronic properties of double quantum heterostructures subjected to externally applied magnetic fields.
Article
Astronomy & Astrophysics
A. Di Piazza, T. Patuleanu
Summary: Upcoming experiments on the interaction of electrons with intense laser fields require more accurate theoretical computations, including radiative corrections to the mass operator and electron mass shift in an arbitrary plane wave. The spin-dependent part of the electron mass shift can be linked to the anomalous magnetic moment of the electron in the plane wave. Additionally, it is possible to define a local expression of the electron anomalous magnetic moment within the locally constant field approximation.
Article
Chemistry, Physical
Martin Jindra, Matej Velicky, Milan Bousa, Ghulam Abbas, Martin Kalbac, Otakar Frank
Summary: This study introduces a localized spectroelectrochemical method that addresses the issue of distinguishing processes at the edges/defects from those at the intact basal plane. By comparing the electrochemical and spectral responses of monolayer graphene samples with different levels of disorder, it is discovered that both intact and defective areas contribute to the Raman G band shifts and cyclic voltammetry using the hexaammineruthenium complex. Consequently, two independent electron transfer processes coexist in one sample, but are restricted to defect-free and defect-rich areas, respectively.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Ja-Hon Lin, Gung-Rong Chen, Sheng-Jie Li, Yu-Feng Song, Wei-Rein Liu
Summary: This study investigates the polarization characteristics of amplified spontaneous emissions (ASEs) from ZnO/Zn0.8Mg0.2O multiple quantum wells (MQWs) and finds linear polarization under pulsed light excitation. The findings have practical significance for the application of microcavity lasers in metrology and biomedical imaging.
Article
Engineering, Civil
Yan Tang, Fujian Tang, Junxing Zheng, Zhaochao Li
Summary: This study focuses on the in-plane asymmetric buckling of heated circular FGM arches under uniform pressure fields, analyzing the effects of thermal field on the static stability of the structures. The analytical predictions and finite element simulations provide insights into the buckling pressure and the influence of material inhomogeneity on internal forces.
ENGINEERING STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Lara C. Ortmanns, Janine Splettstoesser, Maarten R. Wegewijs
Summary: This paper analyzes the time evolution of a quantum dot under the influence of a proximized large-gap superconductor and weak probing of charge and heat currents. It is found that due to the proximity effect, there are two distinct switching procedures that can initialize a nonstationary mixture state of the proximized quantum dot dependent on the gate voltage. The time-dependent heat current is particularly sensitive to the interplay between strong Coulomb interaction and induced superconducting pairing. The analysis highlights the use of analytic formulas derived using fermionic duality, which is a dissipative symmetry of the master equations describing these open systems.
Article
Engineering, Geological
Yunqiu Song, Xinzhu Li, Zailin Yang, Yong Yang, Menghan Sun
Summary: This paper presents an exact, analytical solution to the boundary value problem of anti-plane (SH) waves scattering by an isosceles triangle hill on an elastic half-space, and provides numerical results to illustrate the effects of the hill on ground motion. It revises existing analytical methods and aims to serve as a benchmark for numerical method verification and a reference for engineering practice.
Article
Astronomy & Astrophysics
Hing-Tong Cho
Summary: This paper studies quantum field theory in impulsive plane wave spacetimes and analyzes the geodesics and the formation of conjugate planes. The behaviors of the world function and the van Vleck determinant near the conjugate plane are also considered. By examining the Wightman functions and the noise kernel, the paper shows how their singularity structures change when crossing the conjugate plane.
Article
Materials Science, Multidisciplinary
Maciej Kubisa, Krzysztof Ryczko
Summary: In inverted HgTe quantum wells, a strong in-plane magnetic field can reverse the normal sequence of subbands, transforming the system from a topological insulator to a normal insulator phase. This transformation involves two consecutive quantum phase transitions due to large Zeeman splitting of electron states, while the intermediate phase is semimetallic due to negligible Zeeman splitting of hole states. These phase transitions and the semimetallic phase have been observed, and the theory provides a consistent interpretation of experimental results.
Article
Nanoscience & Nanotechnology
Yiyun Zhang, Dominic Lepage, Yiming Feng, Sihan Zhao, Hongsheng Chen, Haoliang Qian
Summary: Tunnel nanojunctions based on inelastic electron tunneling (IET) have been proposed as breakthroughs for ultra-fast integrated light sources, but the weak photon-emission power and limited efficiency due to elastic tunneling have hindered their practical applications. Resonant tunneling has been suggested as a solution, but the contradiction between high photon-emission efficiency and power has remained unsatisfactory. This work introduces a novel approach using multiple metallic quantum wells to achieve stronger resonant tunneling enhancement, enabling the internal quantum efficiency to reach approximately 1 and photon-emission power to reach approximately 0.8 μW/μm², bringing practical implementation of IET-based sources one step closer to reality.
Article
Physics, Applied
Shota Sato, Kyohei Sugaya, Koichi Nakanishi, Nobuhide Yokota, Makoto Kohda, Ken Morita
Summary: Recently, we observed the out-of-plane Dresselhaus spin-orbit (SO) interaction field and extracted the SO coefficient beta from InGaAs (110) quantum wells. However, the extracted beta was much larger than that of the (001) QWs, indicating an in-plane Dresselhaus SO field. Through Monte-Carlo simulations, we reproduced the results of time-resolved and spatiotemporally resolved Kerr rotation measurements in InGaAs (110) QWs. The results conclusively show that InGaAs (110) QWs have a stronger out-of-plane Dresselhaus SO field compared to (001) QWs.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Junhong Yu, Sujuan Hu, Huayu Gao, Savas Delikanli, Baiquan Liu, Jacek J. Jasieniak, Manoj Sharma, Hilmi Volkan Demir
Summary: By investigating the emission properties, it has been observed that Cu-doped CQWs have efficient phonon cascade process and a giant Huang-Rhys factor, indicating an ultrastrong electron-phonon coupling. These findings challenge the widely accepted consensus and have important implications for optoelectronic applications of doped electronic nanomaterials.
Article
Engineering, Mechanical
Krystian Polczynski, Sergii Skurativskyi, Maksymilian Bednarek, Jan Awrejcewicz
Summary: This study investigates the nonlinear forced vibrations of two pendulums coupled by an elastic element, with one pendulum driven by magnetic stimulus. A rational approximation of the magnetic torque enables numerical and analytical studies, focusing on resonant phenomena and periodic regimes. The technique of successive maxima map is employed to study complex regimes, revealing changes in profile shapes and strongly chaotic trajectories at different driving frequencies.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
