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Jayesh Jain (National Institute of Technology, Rourkela, India)05/12/2022, 10:00
In a class of single field models of inflation, the idea of primordial black holes (PBHs) production is studied. In this case, the dynamics on small cosmological scales differs significantly from that of the large scales probed by the observations of cosmic microwave background (CMB). This difference becomes a virtue in producing correct physical ambiance for the seeds required to produce...
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Ms Maryam Ranjbar (Master's student at Golestan University, Iran.)05/12/2022, 10:30
Despite the discovery of late-time accelerated expansion of the universe, we still have no clue about the physics behind that. Therefore, the answer might be lied in Modified Gravity theories. A modification in geometric structure of space-time causes noticeable differences in gravitational waves equation compared to the known form of gravitational waves in general relativity.
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Various... -
Lakhdar Sek05/12/2022, 11:00
In this work,we study the (2+1) dimensional massless dirac equation within a uniform magnetic field in the
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commutation relations of the Anti deSitter space.Firstly, we solved the system in order to obtain the en-
ergy eigenvalues and the corresponding wave function as Jacobi polynomials by using the Nikiforov-Uvarov
method, we find the findings have been affected by the studied deformation... -
Bohuslav Matouš (Masaryk University, Brno, Czechia)05/12/2022, 12:00
The conventional Hamiltonian theory fails to provide covariant Hamiltonian description
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of relativistic physics. To achieve covariant Hamiltoninan description, the covariant
Hamiltonian theory also called Weyl-de Donder theory can be used. With its help,
we have shown, that covariant Hamiltonian can be found for F(R) gravity.
F(R) gravity is a modification of General Relativity, where... -
Yevhen Lunin05/12/2022, 12:30
SCHWARZSCHILD RADIUS FOR ELECTRIC CHARGE
The aim of this work is to prove the formula for the Schwarzschild radius analog in case of a static spherically symmetric electric charge. The work contains two elegant proofs of the formula for the gravitational radius and for its analog in the case of an electric charge. The author mathematically proves that the Schwarzschild radius formula should...
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Ms DEESHANI MITRA (St Xavier's College(Autonomous),Kolkata)05/12/2022, 13:00
In this dissertation we intend to study the background related to the memory effect that leads to "gravitational-wave memory effect" and two types of memory effect:(1) We intend to study a whole outline of what is memory effect.(2) We intend to solve the linear memory for N Gravitationally Unbound Particles where we will study different kinds of spherical harmonics,mass quadrapole leading to...
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Sergey Shevchenko (Institute of Physics of NAS of Ukraine, ret., now independent researcher)05/12/2022, 13:30
This article is some review of results that were obtained at 2007-2021 years development of “The Information as Absolute” concept and the informational physical model, which is based on the concept; including a number of fundamental physical problems are briefly considered in framework of the conception and the model. Recently in physics there are several publications, that present lists of...
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Riccardo Storti05/12/2022, 16:00
In 2007, Storti predicted that the value of the Cosmic Microwave Background Radiation (CMBR) Temperature may be improved by one-order-of-magnitude; from the Particle Data Group (PDG) value of [T0 = 2.725 ± 0.001 (K)] to [T0 = 2.7254 (K)]. In 2011, the PDG revised their value of CMBR to [T0 = 2.7255 ± 0006 (K)]; confirming Storti’s prediction. In 2008, Storti predicted a ΛCDM Hubble Constant of...
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Vaibhav Kalvakota05/12/2022, 16:30
The Weyl curvature hypothesis by Penrose describes the evolution of the universe according to the second law of thermodynamics using a form of gravitational entropy, described by the Weyl curvature tensor. Using this, the evolution of the universe is guided by a monotonically increasing Weyl curvature, and the proposal has several conditions, one of them being that the gravitational entropy...
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Frederic Lassiaille05/12/2022, 17:00
In General Relativity (GR) Einstein equation is constructed from GR lagrangian under an implicit assumption. It is that in regular matter, energy of particles in motion can be completely discarded. This appears when the opposite assumption is tried and when its consequences in GR are studied. This study is lead by a macroscopic approximation given by a new equation called "Discrete Relativity...
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Dr ANTONIO GALLERATI (Polytechnic of Turin, DISAT Department, Italy)05/12/2022, 17:30
We discuss the possible coupling between a superfluid and the local gravitational field. After introducing a quantum-gravity theoretical framework to describe the supercondensate-graviton coupling, we exploit an effective theory for generalized Maxwell-type fields to analyze quantum effects originating from the proposed interplay.
From an experimental point of view, it had been shown that...
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Swapnil Singh07/12/2022, 09:30
List item
**Dark matter and Gravitational Effects**Author: Swapnil K Singh
BMS College of Engineering, Bull Temple Rd, Basavanagudi, Bengaluru, Karnataka, India 560019
(Email ID: swapnil.me21@bmsce.ac.in)The nature of dark matter (DM) is currently one of the most intriguing questions of fundamental physics. Yet, its existence is still debated, and relies on the...
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Anatolii Tugay (Taras Shevchenko National University of Kyiv)07/12/2022, 10:00
We are developing the optimal recipe to separate the spectral counterparts of the active galactic nucleus NGC 1275 and the Perseus cluster surrounding it in the spectra observed by Suzaku/XIS cameras. The key problem here is due to the fact that the emission of the cluster reaches the energies significantly higher than in the most cases of AGN even for those situated in the surroundings quite...
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Swapnil Singh07/12/2022, 10:30
Gamma-ray bursts (GRB’s), short and intense pulses of low-energy γ rays, have fascinated astronomers and astrophysicists since their unexpected discovery in the late sixties. GRB’s are accompanied by long-lasting afterglows, and that they are associated with core-collapse supernovae. The detection of delayed emission in X-ray, optical, and radio wavelength, or “afterglow,' following a γ-ray...
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Mr Nishant Yadav, Mr Suryansh Saxena07/12/2022, 11:00
This research paper is about the informal (symmetric/asymmetric) distribution of light around nebulas, which also provides us a brief on how and on what factors the shape of the structure depends upon. This research work is conducted by observing and using different image sets as well as sonification of the observed images to get a better and concrete result for the research work. At the end...
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Sean Xu07/12/2022, 12:00
Predicting freefall time is a major problem in galactic dynamics. The relaxation time of collisionless dark matter, which heavily influences galaxy evolution, is closely related to its freefall time. Calculating freefall time using Kepler’s Third Law does not consider the effects of the universe’s expansion. This paper proposes a new formula for calculating freefall time in an expanding...
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Ms Sarra Garah (Faculty of exact sciences, university of tebessa)07/12/2022, 12:30
The gravitational waves appear as wave solution for the Einstein’s equations of General Relativity. They were predicted by Einstein in 1916. These ripples of space time are generated by the punctual acceleration of matter in the Universe. The existence of gravitational waves was confirmed by the study of the Binary Pulsar PSR 1913+16 in 1980s. The first experimental discovery was on September...
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Syed adil Pasha (Shiv Nadar University, Greater Noida)07/12/2022, 13:00
In the R-parity conserving Minimal Supersymmetric Standard Model (MSSM)
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the Lightest Supersymmetric Particle (LSP) is a well-motivated dark matter (DM) candidate.
From the perspective of naturalness, light Higgsino-like neutralino states are favored and have been studied widely in the literature. In this presentation, we focus on the direct detection prospects for light higgsino-like... -
Che-Yu Chen (Institute of Physics, Academia Sinica)07/12/2022, 15:30
The geometric optics approximation provides an interpretation for eikonal correspondence that, in black-hole-containing spacetimes, connects high-frequency black hole quasinormal modes with closed photon orbits around said black hole. This correspondence has been identified explicitly for several GR black holes, violation of which can be a potential hint toward physics beyond GR. However, the...
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Hadjar Rezki07/12/2022, 16:00
The phenomenon of scalar particles creation in a non-commutative space-time when an electric field is present, is analyzed. Our purpose is to study the effect of the electric field on the creation of particles from vacuum. We have used the Bogoliubov transformation technique to calculate the number density of the spin-0 created particles in a non-commutative space-time , it is necessary to...
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Ms DEESHANI MITRA (St Xavier's College(Autonomous),Kolkata)07/12/2022, 16:30
In this dissertation we intend to study the background related to the memory effect that leads to "gravitational-wave memory effect" and two types of memory effect:(1) We intend to study a whole outline of what is memory effect.(2) We intend to solve the linear memory for N Gravitationally Unbound Particles where we will study different kinds of spherical harmonics,mass quadrapole leading to...
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Mostafa Nasser (Helwan University)07/12/2022, 17:00
To study atmospheric gravity waves, a large number of airglow images must be processed. In this work we present a program that was developed to recognizing gravity waves patterns in ASAI images. The recognizing procedure contains a classification model based on a convolutional neural network (CNN) and object detection models. Classification model selects clear nighttime images from all ASAI...
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Monica Verducci (Universita & INFN Pisa (IT))08/12/2022, 09:30
The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. On the other hand, the existence of extra spatial dimensions could provide solutions to longstanding issues with the SM, such as the hierarchy problem, and...
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Kshitij Agarwal (Eberhard Karls Universität Tübingen (DE))08/12/2022, 10:00
The Nuclear Equation of State (EoS) at suprasaturation densities and its importance in determining Neutron Star properties has been the focus of several experimental and theoretical activities worldwide. This truely multi-messenger effort spans all the way from the nuclear theory calculations based on Chiral Effective Field Theory all the way to astrophysical measurements of the neutron stars...
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SOMITA DHAL (BIRLA INSTITUTE OF TECHNOLOGY, MESRA, RANCHI)08/12/2022, 10:30
Cosmology, as the name suggests, concerns the study of the origin, structure, laws, and ultimate fate of the universe on a very large scale. The origin of the universe and its evolution have always been the most sought-after information for us. To know how the universe came into existence, CMB is the most practical tool, or the only one, at least for now, available to us. CMB, the earliest...
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Dr Karima Bouakaz (ENS-KOUBA)08/12/2022, 11:00
In a series of works, we have used the imaginary time formalism to study the infrared behavior of the gluon and quark damping rates [1, 2, 3, 4, 5, 6, 7]. The results have indicated that there are difficulties in the infrared sector. A similar observation has been done in the context of scalar electrodynamics [8]. To look further into the infrared behavior, we propose to calculate the...
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Boyu Chen (HsinChu Science Part)08/12/2022, 12:00
This is an unified theory by using an energy model to explain mass, called the energy spectrum. To explain this theory, a multidimensional concept will be projected on plots. The energy spectrum model can explain from quantum level to universe level physic behaviors.
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Safa Gaid (University of Batna (Algeria))08/12/2022, 12:30
Jet substructure techniques have an important role in high-energy collider physics computations of the hard processes. In this poster, we present the study of the production of a Z-boson plus one jet from pp collision .We show an analytical computation of the jet mass observable at leading order and next to leading order, implementing the trimming technique. As a consequence, after applying...
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Hana Benslama (Batna1)08/12/2022, 13:00
The azimuthal decorrelation ΔΦ for dijet production in e+e− annihilation, is a typical example of a jet shape distribution that promise to provide valuable information on perturbative and non-perturbative QCD dynamics. Where the jets are nearly back to back, the observable in question is sensitive to soft emissions, giving rise to large single logarithms. Employing the four vector...
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Abdel Nasser Tawfik (Future University in Egypt (FUE))08/12/2022, 13:30
With the minimum measurable length uncertainty emerged from the relativistic generalized uncertainty principle in curved spacetime and the generalization of the pseudo-Riemannian manifold to eight-dimensional tangent bundle, the fundamental tensor is conformally modified to accommodate quantum-mechanical, geometric, and gravitational imprints, especially in the relativistic regime. In this...
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Mr Chinonso Onah (Ludwig Maximillian University, Munich)09/12/2022, 09:30
Noise poses a practical challenge to quantum computation on NISQ devices Earlier attempts to simulate quantum fields on a quantum computer have all utilized error mitigation to extract meaningful results as it would not be possible otherwise. Usually, the mitigation technique is Zero Noise Extrapolation (ZNE) but recent results have proved a large difference in error reduction between ZNE and...
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Dr Muhammad Maher (Physics Department, Faculty of Science, Helwan University.)09/12/2022, 10:00
When the minimal length approach emerges from noncommutative Heisenberg
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algebra, generalized uncertainty principle (GUP), and thereby integrating gravitational fields to this fundamental theory of quantum mechanics (QM) is thoughtfully extended to Einstein field equations, the possible deformation of the metric tensor could be suggested. This is a complementary term combining the effects of... -
Dr Muhammad Maher (Physics Department, Faculty of Science, Helwan University.)09/12/2022, 10:30
When generalized noncommutative Heisenberg algebra accommodating impacts of finite gravitational fields as specified by loop quantum gravity, doubly–special relativity, and string theory, for instance, is thoughtfully applied to the eight-dimensional manifold, the generalization of the Riemannian manifold. By constructing the deformed affine connections on a four-dimensional Riemannian...
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Chinonso Onah (Ludwig Maximillian University, Munich)
Blackholes are known to be just one among objects of maximal microstate entropy permitted by unitarity, the so-called saturons. Such systems are also known to possess enhanced memory capacity and are subjected to a universal effect of memory burden, which suppresses their decay. Motivated the generic properties of saturons, we attempt a realization of the prototype saturon model on a quantum...
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Mr Satya Seshavatharam Utpala Venkata (I-SERVE, Survey no-42, Hitech city, Hyderabad-84,Telangana, India)
We are proposing a very simple formula for estimating galactic distances associated with flat rotation speeds. Our basic idea is that, as galactic total mass increases, galactic flat rotation speed as well as the distance associated with flat rotation speed increases. Galactic total mass can be considered as the sum of galactic baryonic mass and dark mass. Galactic core radius seems to depend...
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Tahia Dabash
Following the assumption that the expansion of the Raychudhuri equation in a geometry
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wider than the Riemannian geometry might avoid the space singularity often associated
with various astrophysical models, we aim in the present script at deriving the expansion
and its temporal variation in the parametrized absolute parallelism geometry out approach
utilizes a modified version of geodesic,... -
Satya Seshavatharam Utpala Venkata
In our recently proposed papers, we have proposed new concepts and results pertaining to a very simple and practical model of quantum cosmology based on light speed expanding black hole universe having no dark matter and no dark energy. Our model can be called as Hubble-Hawking Cosmology. Big bang concept can be replaced with Plank scale. Cosmic temperature and expansion rate can be related...
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Introduction to General Relativity
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Deeshani Mitra (St Xavier's College(Autonomous),Kolkata)
A gravitational wave pulse, while passing through spacetime, brings about a change in the relative separation between free particles. This 'memory effect serves as one of its signatures of GW. In this paper, we choose some viable pulse profiles which are yet to be analyzed by earlier workers (e.g. $u^{-4},$ $u^{-2}$. $c/(u^2 + au +b)^{2})$, and examine the memory effect produced by these...
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Introduction to Quantum Mechanics
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Augusto Ohtuka
Ultra-high energy cosmic rays (over 1 EeV) are astrophysical phenomena with no defined source. Near-Earth radio-galaxies (< 50Mpc distance), in particular Centaurus A, M87 and Fornax A, are considered to be one of the main group of ultra-high energy cosmic rays sources, according to data collected from the Pierre Auger Collaboration. Cosmic rays are deflected throughout the Universe, because...
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Satya Seshavatharam Utpala Venkata
Recently we have proposed a mechanism for understanding the nuclear structure based on three large gravitational constants assumed to be associated with weak, strong and electromagnetic interactions. Considering the Newtonian gravitational constant as the forth gravitational constant, we call our model as 4G model of unification. Interesting points to be noted are, 1) Weak interaction seems to...
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Chinonso Onah (Ludwig Maximillian University, Munich)
It is possible to simulate scalar fields' dynamics on quantum omputers by the Bose-Hubbard Hamiltonian. On the other hand, scalar fields are equally ubiquitous in modern comology. In particular many properties of Blackholes can be modelled by scalar fields and blackholes are thought to be quantum objects. Especially with regards to information processing. Thus motivated, we attempt to...
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George Fanaras
We use a path-integral approach to study the tunneling wave function in quantum cosmology with spatial topology S1×S2 and positive cosmological constant (the Kantowski-Sachs model). If the initial scale factors of both S1 and S2 are set equal to zero, the wave function describes (semiclassically) a universe originating at a singularity. This may be interpreted as indicating that an S1×S2...
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Satya Seshavatharam Utpala Venkata
We propose three characteristic relations in developing a simple model of quantum cosmology. We assure the reader that by studying and analyzing them, Lambda cosmology can be refined with ease and clarity.
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Relation-1: Galactic light travel distances can be fitted with, $d_G \cong \left(\frac{z}{1+z}\right)\left(\frac{c}{H_0}\right)$.
Relation-2: Relation between current cosmic temperature... -
Satya Seshavatharam Utpala Venkata
With reference to our recently proposed light speed expanding Hubble-Hawking universe, in this contribution, up to $\left(z+1\right)\cong 1100$, with a marginal error, we make an attempt to fit light travel distances, comoving distances and luminosity distances with very simple relations. Key point to be understood is that, red shift can also be defined as the ratio of increase in photon...
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