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Articles 31 - 60 of 1382
Full-Text Articles in Physical Sciences and Mathematics
Dft Prediction Of Adsorption Properties Of Chrysene On Si(001) Surface, Çağil Kaderoğlu
Dft Prediction Of Adsorption Properties Of Chrysene On Si(001) Surface, Çağil Kaderoğlu
Turkish Journal of Physics
In this study, DFT calculations were carried out in order to reveal the adsorption properties of chrysene molecule on the Si(001)−(2×1) surface. For this purpose, structural, electronic, and optical properties were calculated for five different adsorption configurations. The results show that the electronic and optical properties vary depending on the adsorption configuration of the molecule. In general, the chrysene molecule was found to reduce the work function of the Si(001)−(2×1) surface and affect its optical absorption and reflection properties in the IR and UV regions. These results indicate that the Chrysene + Si(001) hybrid could be quite useful in molecular …
A Comprehensive Study On The Structural, Electrical And Optical Properties Of Dc Sputtered Molybdenum Thin Films, Fi̇li̇z Keleş, Abdullah Atilgan, Eli̇f Damgaci, Ayşe Seyhan, Abdullah Yildiz
A Comprehensive Study On The Structural, Electrical And Optical Properties Of Dc Sputtered Molybdenum Thin Films, Fi̇li̇z Keleş, Abdullah Atilgan, Eli̇f Damgaci, Ayşe Seyhan, Abdullah Yildiz
Turkish Journal of Physics
This study investigates the influence of key deposition parameters on the optoelectronic properties of Molybdenum (Mo) films fabricated via DC magnetron sputtering. The results demonstrate that increasing the Argon gas pressure significantly raises the sheet resistance, primarily due to increased porosity and defect formation. In contrast, films deposited at lower pressures exhibit higher conductivity due to their denser morphology. The substrate temperature also plays a critical role in determining crystallographic structure and electrical performance. Mo bilayer films deposited at 250 °C show a much lower sheet resistance compared to room temperature (RT) growth. Additionally, increasing the total film thickness from …
Exact Solution Of The Two-Reflector Optical System Meeting Herschel’S Condition, Giuseppe Orlando
Exact Solution Of The Two-Reflector Optical System Meeting Herschel’S Condition, Giuseppe Orlando
Turkish Journal of Physics
The exact explicit solution of a stigmatic two-reflector optical system under Herschel’s condition is presented Details of how the solution is calculated are reported. A comparison of caustics between an aplanatic optical system and the relevant system meeting Herschel’s condition is also presented. Ray tracing verification on different optical systems validates the obtained results.
On-Chip Ge-Based Refractive Index Sensor Based On Multislot Ge Waveguide, Çi̇çek Boztuğ
On-Chip Ge-Based Refractive Index Sensor Based On Multislot Ge Waveguide, Çi̇çek Boztuğ
Turkish Journal of Physics
On-chip optical sensors have been attracting significant attention of the researchers due to their portability, low cost, and in-situ detection compatibility. The realization of these compact and mass-producible sensors will be possible if all required optical and electronic components are fully integrated on the same chip. However, the main obstacle here is the lack of the room-temperature on-chip light source; therefore, an external source has been utilized for optical sensing applications. Our work introduces a germanium-based optical sensing structure, specifically designed to operate at low refractive indices, with all required optical components integrated on silicon in a CMOS-compatible manner. The …
Charge Asymmetry Phenomenon For The Leptonically Decaying W Γ Pair At Nnlo Qcd, Kadi̇r Saygin
Charge Asymmetry Phenomenon For The Leptonically Decaying W Γ Pair At Nnlo Qcd, Kadi̇r Saygin
Turkish Journal of Physics
The paper presents for the first time a phenomenological assessment which focuses on the charge asymmetry phenomenon for the W γ production process with subsequent leptonic decay modes W+γ → l+νlγ and W−γ → l−νl¯γ in proton-proton (pp) collisions. Charge asymmetry for the leptonic W γ process is predicted by the inclusion of genuine next-to-next-to-leading order (NNLO) corrections in the QCD perturbation theory. NNLO predictions of asymmetry distributions are assessed for the key observables, including the decay lepton and photon pseudorapidities ηl and ηγ, …
Circular Motion And Thermodynamic Characteristics Of Particles Around A Quintessential Nonrotating Black Hole, Indrajit Halder, Kamal Lochan Mahanta, Rakesh Ranjan Sahoo
Circular Motion And Thermodynamic Characteristics Of Particles Around A Quintessential Nonrotating Black Hole, Indrajit Halder, Kamal Lochan Mahanta, Rakesh Ranjan Sahoo
Turkish Journal of Physics
This paper investigates the geodesics of the Schwarzschild black hole modified with the quintessence field and modeled as a barotropic fluid with a constant equation of state derived in Boyer Lindquist coordinates with natural units G = c = 1. Hamilton–Jacobi formalization is applied to investigate the geodesics in both static and nonstatic black hole spacetime. It specifically examines the formation of bound orbits of test particles around the black hole, highlighting that these orbits result from the interplay between the gravitational pull of the black hole and a repulsive force associated with quintessence. The thermodynamic properties of a black …
Parity-Time Symmetry In Vcsels Utilizing Lithographic Cavities, Abdullah Demi̇r
Parity-Time Symmetry In Vcsels Utilizing Lithographic Cavities, Abdullah Demi̇r
Turkish Journal of Physics
Parity-time symmetry (PTS) has emerged as a powerful strategy for engineering single-mode lasers with enhanced mode selectivity. In this work, we present a systematic numerical study comparing two classes of non-Hermitian micro-laser designs: PTS and quasi-PTS (q-PTS). Using lithographically defined vertical-cavity surface-emitting lasers (Li-VCSELs) as our platform, we show that q-PTS VCSELs offer superior transverse mode discrimination compared to their PTS counterparts. This advantage arises from the unique coupling mechanism in q-PTS architectures, where the fundamental mode preserves its low-loss nature. In contrast, PTS VCSELs require the second-order mode to remain in the PTS phase while the fundamental mode is …
Evolution Of Wormholes Under F(R, T) Theory, The Karmarkar Condition And The Casimir Energy, Murat Metehan Türkoğlu
Evolution Of Wormholes Under F(R, T) Theory, The Karmarkar Condition And The Casimir Energy, Murat Metehan Türkoğlu
Turkish Journal of Physics
In this study, both the evolution of wormholes (by examining both the energy conditions and using the TOV equations) and the effects of the Karmarkar condition on the solutions obtained under certain specific cases were examined in the light of the f(R, T) gravity theory, using two f(R, T) functions predicted to describe the accelerated expansion of the universe. In this context, for the first time in the literature, a generalized shape function was obtained using the Karmarkar condition. It was observed that solutions of the type R -a12/R+a2g(T) satisfy the energy conditions (with the dominant energy condition being partially …
Variational Monte Carlo Optimization Of Proton-Proton Scattering Potential Using The Phase Function Method, Shikha Awasthi, Anil Khachi, O.S.K.S. Sastri
Variational Monte Carlo Optimization Of Proton-Proton Scattering Potential Using The Phase Function Method, Shikha Awasthi, Anil Khachi, O.S.K.S. Sastri
Turkish Journal of Physics
The Riccati-type nonlinear differential equation, also known as the Phase Function equation, is used to construct local inverse potentials for the 1S0 - pp state by bypassing the well-known Schrödinger equation. The pp interaction is described using the Malfliet-Tjon potential model for the nuclear component combined with a screened Coulomb potential, with the phase equation solved via the fourth-order Runge-Kutta (RK-4) method. Based on our analysis, we confirm that the optimized interaction potential closely matches the well-known realistic Argonne V18 and Reid potentials for the 1S0 state, and the computed phase shifts and cross-sections show excellent agreement with experimental data. …
White Pupil Fibre-Fed Echelle Spectrograph Of The Russian-Turkish 1.5 M Telescope: Optical Design And Analysis, Cevdet Bayar, Nuri̇ Unal
White Pupil Fibre-Fed Echelle Spectrograph Of The Russian-Turkish 1.5 M Telescope: Optical Design And Analysis, Cevdet Bayar, Nuri̇ Unal
Turkish Journal of Physics
This study presents optical designs of two fibre-fed èchelle spectrographs (FES), which differ from each other in terms of cross-dispersers, and optical analyses of the spectra (orders) obtained from the designs. Optical analyses of both designs were performed by interpreting the results obtained from the spot diagram, footprint diagram, and encircled energy diagram in the ZEMAX (OpticStudio) optical design program. In the first spectrograph design, prisms were used as the cross-disperser. Specifically, two symmetric N-F2 glass prisms with 42-degree apex angles were used as the cross-disperser. In the second design, a grism was used as the cross-disperser. This grism was …
Rotating Anisotropic Bose Gas With Large Number Of Vortices, Ahmet Keleş
Rotating Anisotropic Bose Gas With Large Number Of Vortices, Ahmet Keleş
Turkish Journal of Physics
Rapidly rotating atomic gases provide a platform for studying phenomena akin to type-II superconductors and quantum Hall systems. Recently, these systems have attracted renewed interest due to technological advances in the trap anisotropy control, in-situ observation capabilities, and cooling and rotating complex atomic species such as dipolar gases. Understanding the vortex lattice formation and quantum melting is crucial for exploring quantum Hall physics in these systems. In this paper, we theoretically investigate the vortex lattices in anisotropic quantum gases. We formulate the rotating gas Hamiltonian in the Landau gauge, and consider the effects of additional perturbations such as the trap …
Supersymmetric Exploration Of External Field Effects On Spinning Cosmic Strings With Aharonov–Bohm Interaction, Bi̇lgehan Bariş Öner, Özlem Yeşi̇ltaş
Supersymmetric Exploration Of External Field Effects On Spinning Cosmic Strings With Aharonov–Bohm Interaction, Bi̇lgehan Bariş Öner, Özlem Yeşi̇ltaş
Turkish Journal of Physics
We have conducted a supersymmetric analysis of the spacetime of a spinning cosmic string, focusing on the behavior of an electron in magnetic fields. Our study involves examining the Dirac system through the lens of exceptional orthogonal polynomials, specifically the exceptional orthogonal Laguerre $X_{m}$ polynomials. This analysis transforms the Dirac system into a relativistic system with a nonlinear isotonic oscillator. Additionally, we introduce new potential models that extend the radial oscillator by incorporating rational terms. Comprehensive analyses of the potential, energy levels, and probability density graphs are provided for various topological defects of cosmic strings and different parameters of the …
Still More On Wahlquist Metric, Mahmut Hortaçsu
Still More On Wahlquist Metric, Mahmut Hortaçsu
Turkish Journal of Physics
We start by reviewing the status of the Wahlquist metric and give references to the relevant literature. Then, in studying the scattering properties of a scalar particle at the center coming from infinity, we give three methods to obtain finite scattering coefficients.
Quantum Singular Oscillator With Potential Controlled By Position-Dependent Mass, Elchin Jafarov, Shakir Nagiyev
Quantum Singular Oscillator With Potential Controlled By Position-Dependent Mass, Elchin Jafarov, Shakir Nagiyev
Turkish Journal of Physics
An exactly solvable model of a nonrelativistic quantum singular oscillator with a controlled potential is constructed. A position-dependent mass is introduced instead of a constant mass of the quantum system under consideration in such a way that it is possible to purposefully control the shape of the potential, turning it into a quantum well with different depths. It is shown that analytical expressions of the wave functions of such a quantum system are described through 2F1 type hypergeometric functions and Jacobi polynomials, whereas, the discrete energy spectrum corresponding to these analytic solutions is non-equidistant. In a specific limit, when the …
Temperature-Dependent Quantum Beats Between Neutral And Charged Excitons In Monolayer Mose2, İbrahi̇m Sarpkaya
Temperature-Dependent Quantum Beats Between Neutral And Charged Excitons In Monolayer Mose2, İbrahi̇m Sarpkaya
Turkish Journal of Physics
We studied the interaction between the neutral and charged excitons of monolayer MoSe2 at various temperatures via quantum beat spectroscopy in the time domain. We introduced temperature as an efficient control knob to regulate the relative photoluminescence intensities of the neutral and charged excitons to obtain maximum quantum beat resolution. Also, our quantum beat measurements under different temperatures indicate that the decoherence time of the coupled exciton-trion state slightly decreases from 530 fs at 3.5 K to 420 fs at 63 K with increased temperature due to the low-energy acoustic phonon-induced dephasing.
Alternative Scenarios For The Lhc Based Electron-Proton Collider, Ahmet Nuri̇ Akay, Burak Dağli, Bora Ketenoğlu, Ari̇f Öztürk, Saleh Sultansoy
Alternative Scenarios For The Lhc Based Electron-Proton Collider, Ahmet Nuri̇ Akay, Burak Dağli, Bora Ketenoğlu, Ari̇f Öztürk, Saleh Sultansoy
Turkish Journal of Physics
Construction of the ERLC (twin LC) collider tangential to LHC will allow investigating ep collisions at essentially higher center-of-mass energies than ERL-50 and LHC based ep collider. Luminosity estimations show that values well exceeding 1034 cm−2s−1 can be achieved for ERLC and HL-LHC based ep colliders. Certainly, proposed ep colliders have great potential for clarifying QCD basics and new physics search in addition to providing precise PDFs for adequate interpretation of the LHC experimental data. Another alternative to the ERL-50 is to construct an e-ring with the same energy and length. In this case, luminosity of order 1034cm−2s−1 can be …
Axion Dark Matter With Not Quite Black Hole Domination, Ufuk Aydemi̇r
Axion Dark Matter With Not Quite Black Hole Domination, Ufuk Aydemi̇r
Turkish Journal of Physics
No abstract provided.
Comparative Study Of Α-Α Interaction Potentials Constructed Using Various Phenomenological Models, Ayushi Awasthi, O S K S Sastri
Comparative Study Of Α-Α Interaction Potentials Constructed Using Various Phenomenological Models, Ayushi Awasthi, O S K S Sastri
Turkish Journal of Physics
No abstract provided.
Weyl Tensor Decomposition To The Formation Of Black Hole, Gauree Shanker, Zakia Issa Ndidi
Weyl Tensor Decomposition To The Formation Of Black Hole, Gauree Shanker, Zakia Issa Ndidi
Turkish Journal of Physics
No abstract provided.
Mechanical Calculations On Atomically Thin Membranes, Burak Aslan
Mechanical Calculations On Atomically Thin Membranes, Burak Aslan
Turkish Journal of Physics
No abstract provided.
Low Fine-Tuning With Heavy Higgsinos In Yukawa Unified Susy Guts, Cem Salih Ün
Low Fine-Tuning With Heavy Higgsinos In Yukawa Unified Susy Guts, Cem Salih Ün
Turkish Journal of Physics
The work presented considers a class of minimally constructed Yukawa unified SUSY GUTs - NUHM2 - and explores their implications when their soft supersymmetry breaking Lagrangian is generalized by the nonholomorphic terms which provide extra contributions to the Higgsino mass and couple the supersymmetric scalar fields to the wrong Higgs doublets. With such a simple extension, it can be found several regions with interesting implications which cannot be realized in the usual restricted models. It is observed that the Yukawa unification solutions can be compatible with a relatively light mass spectrum and acceptable low fine-tuning measurements. In the restricted models …
Reheating Constraints To Palatini Coleman-Weinberg Inflation, Nilay Bostan
Reheating Constraints To Palatini Coleman-Weinberg Inflation, Nilay Bostan
Turkish Journal of Physics
In this work, we examine the reheating constraints to symmetry-breaking mechanism, which is associated with Coleman-Weinberg inflation in the early universe. We consider the Coleman-Weinberg inflation potential, where the inflaton has a v ̸= 0 after inflation. Setting Treh = 105 GeV, we first show wreh dependency on ns , r , and N∗ for AV case. Then, we demonstrate the results of ns , r , N∗ , α = dns/d ln k for different reheating temperatures and compare the results with the latest BICEP/Keck data. We also present that ns −r and ns −N∗ planes and the effect …
Lithography-Free Highly Sensitive Detection Of Glucose Based On Colloidal Spheres, Habibe Durmaz
Lithography-Free Highly Sensitive Detection Of Glucose Based On Colloidal Spheres, Habibe Durmaz
Turkish Journal of Physics
Diabetes has emerged as a global health crisis, with a substantial increase in prevalence and associated healthcare costs. The urgency for early diagnosis to prevent complications has fueled research into advanced biosensing technologies. Plasmonic sensors, leveraging localized surface plasmon resonance (LSPR), have gained prominence for their sensitivity. This study explores a metamaterial-based sensor platform comprising nanospheres fabricated through colloidal lithography. A comprehensive numerical and experimental analysis of the designed metamaterial-based perfect absorber is presented, focusing on the spectral response at the resonance frequency of 525 nm. Finite-difference time-domain (FDTD) simulations reveal the field and charge distributions, enabling a systematic exploration …
A Comprehensive Review Of Geometrical Thermodynamics: From Fluctuations To Black Holes, S. Mahmoudi, Kh. Jafarzade, Seyed Hossein Hendi
A Comprehensive Review Of Geometrical Thermodynamics: From Fluctuations To Black Holes, S. Mahmoudi, Kh. Jafarzade, Seyed Hossein Hendi
Turkish Journal of Physics
This paper presents a comprehensive review of geometrical thermodynamics, which employs geometric concepts to study the thermodynamic properties of physical systems. The review covers key topics such as thermodynamic fluctuation theory, proposed thermodynamic metrics in various coordinate systems, and thermodynamic curvature.Additionally, the paper discusses the geometrical approach to black hole thermodynamics and provides an overview of recent research in this field.
A Portable And Low-Cost Incubator System Enabling Real-Time Cell Imaging Based On A Smartphone, Ari̇f Engi̇n Çeti̇n
A Portable And Low-Cost Incubator System Enabling Real-Time Cell Imaging Based On A Smartphone, Ari̇f Engi̇n Çeti̇n
Turkish Journal of Physics
Incubators serve as essential tools for maintaining optimal temperature, humidity, and atmospheric gas composition for cell cultures. Their applications span across various fields like cell biology, microbiology, and molecular biology. However, in many cell-based studies, observing cellular changes often necessitates moving cells out of the incubator for microscope examination. Unfortunately, exposing cells to an environment that does not support healthy growth can undermine the reliability of test outcomes. In this article, we present a groundbreaking solution: a cost-effective, portable incubator system seamlessly integrated with a smartphone for real-time characterization tests. This innovation offers comparable imaging capabilities and maintains an environment …
A Compendious Review Of Majorization-Based Resource Theories: Quantum Information And Quantum Thermodynamics, Gökhan Torun, Onur Pusuluk, Özgür Esat Müstecaplioğlu
A Compendious Review Of Majorization-Based Resource Theories: Quantum Information And Quantum Thermodynamics, Gökhan Torun, Onur Pusuluk, Özgür Esat Müstecaplioğlu
Turkish Journal of Physics
The field of quantum resource theory (QRT) has emerged as an invaluable framework for the examination of small and strongly correlated quantum systems, surpassing the boundaries imposed by traditional statistical treatments. The fundamental objective of general QRTs is to characterize these systems by precisely quantifying the level of control attainable to an experimenter. In this review article, we refrain from providing an exhaustive summary of the extensive literature on QRT. Rather, our focus centers on a specific subliterature founded upon the theory of majorization. The primary aim is to augment our comprehension of genuine quantum phenomena manifested across diverse technological …
Development And Benchmark Of A 1d3v Electrostatic Pic/Mcc Numerical Code For Gas Discharge Simulations, İbrahi̇m Arda, İsmai̇l Rafatov
Development And Benchmark Of A 1d3v Electrostatic Pic/Mcc Numerical Code For Gas Discharge Simulations, İbrahi̇m Arda, İsmai̇l Rafatov
Turkish Journal of Physics
Gas discharge plasmas are low-temperature nonequilibrium plasmas that have a wide range of scientific and technological applications. The particle-in-cell/Monte Carlo collision (PIC/MCC) method is a reliable approach for numerical analyses and simulations of such plasmas. In this study, we first provide a detailed description of the basics of this method. We then verify the programme code that we developed in Fortran by benchmarking the code against a widely referred reference study simulating a radiofrequency capacitively coupled plasma (RFCCP) in helium for various discharge conditions. We show that the results of the present study are in good agreement with that of …
ℼ± -,ℼ0-Meson Electroweak Decays Within Relativistic Quark Model Based On Point Form Of Poincaré-Invariant Quantum Mechanics, Vadzim Haurysh, Viktor Andreev
ℼ± -,ℼ0-Meson Electroweak Decays Within Relativistic Quark Model Based On Point Form Of Poincaré-Invariant Quantum Mechanics, Vadzim Haurysh, Viktor Andreev
Turkish Journal of Physics
In the course of work the integral representation of ℼ0-meson form-factor of ℼ0 → γγ process has been obtained within relativistic quark model based on point form of Poincaré-invariant quantum mechanics taking into account anomalous magnetic moments of κυ and κⅾ quarks. The parameters obtained using pseudoscalar density constant gℼ± , current masses of υ- and ⅾ-quarks as well as decay constant ℼ± → ℓ±νℓ were used for numerical modeling of Fℼ0γ(t) form-factor in time-like region. Similar calculations for ℼ0 → γγ decay characteristics with reference to quark …
Speeding The Generation Of Giant Entangled States Using Low-Frequency Modulations, Abdelaziz Benseghir, Azeddine Messikh, Ahmed Bouketir
Speeding The Generation Of Giant Entangled States Using Low-Frequency Modulations, Abdelaziz Benseghir, Azeddine Messikh, Ahmed Bouketir
Turkish Journal of Physics
In this paper, we generalize the shortcuts to adiabacity for the quantum Rabi model by simultaneously modulating its two components, namely, the two-level system and the cavity mode. This will eliminate the counterrotating terms which in turn helps to simulate the Rabi model by the Jaynes-Cummings model without requiring a largely detuned light-matter coupling. We focus on the low-frequency modulations since it is easy to realize them experimentally. The results show that these modulations can significantly shorten the evaluation time, generate much larger entanglement cat states, and robust against imperfection of time evaluation and dissipation.