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Towards 6D Little String Theory of Particles
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作者 Risto Raitio 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第2期546-561,共16页
A model for particles based on preons in chiral, vector and tensor/graviton supermultiplets of unbroken global supersymmetry is engineered. The framework of the model is little string theory. Phenomenological predicti... A model for particles based on preons in chiral, vector and tensor/graviton supermultiplets of unbroken global supersymmetry is engineered. The framework of the model is little string theory. Phenomenological predictions are discussed. 展开更多
关键词 Standard Model Composite Models SUPERSYMMETRY Little string theory T-DUALITY HOLOGRAPHY
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Derivation of Multiverse from Universal Wave Function Interpretation of String Theory
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作者 Zhi Gang Sha Rulin Xiu 《Journal of Physical Science and Application》 2017年第6期1-5,共5页
The multiverse is a hypothesis created to solve certain problems in cosmology. Currently, this scheme is still largely ad hoc, rather than derived from fundamental laws and principles. Because of this, the predictive ... The multiverse is a hypothesis created to solve certain problems in cosmology. Currently, this scheme is still largely ad hoc, rather than derived from fundamental laws and principles. Because of this, the predictive power of this theory is rather limited. Furthermore, there are concerns that this theory will make it impossible to calculate some measured quantities, such as the masses of quarks and the electron. In this paper, we will show that a new development in string theory, the universal wave function interpretation of string theory, provides a way to derive the mathematical expression of the multiverse. We will demonstrate that the Weyl invariance existing in string theory indicates that our observed universe is a projection from a hologram. We will present how the laws of physics can be derived from this fact. Furthermore, we suggest it may also provide a way to calculate the masses of fundamental particles such as quarks and the electron. 展开更多
关键词 string theory MULTIVERSE grand unification theory cosmology holographic universe universal wave function interpretation of string theory.
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Inflation Scheme Derived from Universal Wave Function Interpretation of String Theory
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作者 Dr. Zhi Gang Sha Rulin Xiu 《Journal of Physical Science and Application》 2017年第4期33-37,共5页
Inflation is the most commonly accepted theory in cosmology to explain why the universe appears flat, homogeneous, and isotropic, as well as the origin of the large-scale structure of the cosmos and why no magnetic mo... Inflation is the most commonly accepted theory in cosmology to explain why the universe appears flat, homogeneous, and isotropic, as well as the origin of the large-scale structure of the cosmos and why no magnetic monopoles have been detected. However, so far, the origin of the inflation epoch and what is the hypothetical field, the inflation, giving rise to inflation, remains unknown. String theory is one of the promising candidates for the grand unification theory. Grand unification theory is to use one mathematic formula to describe everything. In this work, we study the inflation scheme in a new development in string theory, UWFIST (universal wave function interpretation of string theory). We show that from UWFIST we can derive from the fundamental theory that the long-range vibration is the possible candidate of inflation. We estimate the vacuum energy created by the long-range vibration and show that it can indeed drive the inflation. 展开更多
关键词 INFLATION string theory universal wave function interpretation of string theory grand unification theory.
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Two-Flux Colliding Plane Waves in String Theory
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作者 CHEN Bin ZHANG Jun-Feng 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第3X期463-472,共10页
We construct the two-flux colliding plane wave solutions in higher-dimensional gravity theory with dilaton,and two complementary fluxes. Two kinds of solutions have been obtained: Bell-Szekeres (BS) type and homogeneo... We construct the two-flux colliding plane wave solutions in higher-dimensional gravity theory with dilaton,and two complementary fluxes. Two kinds of solutions have been obtained: Bell-Szekeres (BS) type and homogeneous type. After imposing the junction condition, we find that only the BS type solution is physically well-defined. Furthermore, we show that the future curvature singularity is always developed for our solutions. 展开更多
关键词 colliding plane wave string theory
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Negative corrections to black hole entropy from string theory
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作者 Liang Ma Yi Pang Hong Lu 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2023年第12期71-76,共6页
We report for the first time that in heterotic string compactified on 4-torus or equivalently IIA string compactified on K3,the leading α′corrections to the rotating black string entropy at fixed conserved charges c... We report for the first time that in heterotic string compactified on 4-torus or equivalently IIA string compactified on K3,the leading α′corrections to the rotating black string entropy at fixed conserved charges can be negative.This further implies that the correction to the mass of extremal rotating string is positive,opposite to the standard expectation from the weak gravity conjecture.Our result suggests that the validity of positivity of entropy shift due to higher order operators depends on other factors omitted previously in the effective field theory analysis. 展开更多
关键词 supergravities higher-derivative corrections effective theories black holes quantum gravity string theory
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Stringy Phenomenology with Preon Models
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作者 Risto Raitio 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第1期1-7,共7页
We compare, following Pati, global symmetries, our topological supersymmetric preon model with the heterotic E<sub>8</sub> × E<sub>8</sub> string theory. We include Pati’s supergravity ba... We compare, following Pati, global symmetries, our topological supersymmetric preon model with the heterotic E<sub>8</sub> × E<sub>8</sub> string theory. We include Pati’s supergravity based preon model in this work and compare the preon interactions of his model to ours. Based on preon-string symmetry comparison and preon phenomenological results, we conclude that the fundamental particles are likely preons rather than standard model particles. . 展开更多
关键词 Topological Field theory Chern-Simons theory SUPERSYMMETRY string theory
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On Some Mathematical Connections between the Cyclic Universe, Inflationary Universe, p-Adic Inflation, p-Adic Cosmology and Various Sectors of Number Theory
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作者 Michele Nardelli 《Journal of Modern Physics》 2024年第11期1869-1958,共90页
This paper is a review, a thesis, of some interesting results that have been obtained in various research concerning the “brane collisions in string and M-theory” (Cyclic Universe), p-adic inflation and p-adic cosmo... This paper is a review, a thesis, of some interesting results that have been obtained in various research concerning the “brane collisions in string and M-theory” (Cyclic Universe), p-adic inflation and p-adic cosmology. In Section 2, we have described some equations concerning cosmic evolution in a Cyclic Universe. In Section 3, we have described some equations concerning the cosmological perturbations in a Big Crunch/Big Bang space-time, the M-theory model of a Big Crunch/Big Bang transition and some equations concerning the solution of a braneworld Big Crunch/Big Bang Cosmology. In Section 4, we have described some equations concerning the generating ekpyrotic curvature perturbations before the Big Bang, some equations concerning the effective five-dimensional theory of the strongly coupled heterotic string as a gauged version of N=1five-dimensional supergravity with four-dimensional boundaries, and some equations concerning the colliding branes and the origin of the Hot Big Bang. In Section 5, we have described some equations regarding the “null energy condition” violation concerning the inflationary models and some equations concerning the evolution to a smooth universe in an ekpyrotic contracting phase with w>1. In Section 6, we have described some equations concerning the approximate inflationary solutions rolling away from the unstable maximum of p-adic string theory. In Section 7, we have described various equations concerning the p-adic minisuperspace model, zeta strings, zeta nonlocal scalar fields and p-adic and adelic quantum cosmology. In Section 8, we have shown various and interesting mathematical connections between some equations concerning the p-adic inflation, the p-adic quantum cosmology, the zeta strings and the brane collisions in string and M-theory. Furthermore, in each section, we have shown the mathematical connections with various sectors of Number Theory, principally the Ramanujan’s modular equations, the Aurea Ratio and the Fibonacci’s numbers. 展开更多
关键词 string theory M-theory Cyclic Cosmology p-Adic and Adelic Analysis Number theory Ramanujan’s Modular Equations
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String cosmological models in the Brans-Dicke theory for five-dimensional space-time
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作者 Koijam Manihar Singh Kangujam Priyokumar Singh 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2012年第1期39-45,共7页
Five-dimensional space-time string cosmological models generated by a cloud of strings with particles attached to them are studied in the Brans-Dicke theory. We obtain two types of interesting models by taking up the ... Five-dimensional space-time string cosmological models generated by a cloud of strings with particles attached to them are studied in the Brans-Dicke theory. We obtain two types of interesting models by taking up the cases of geometric strings (or Nambu strings) and p-strings (Takabayasi strings), and study their different physi- cal and dynamical properties. The roles of the scalar field in getting different phases, such as the inflationary phase and the string-dominated phase, are discussed. An in- teresting feature obtained here is that in one of the models there is a "bounce" at a particular instant of its evolution. 展开更多
关键词 cosmology: theory -- string universes -- Brans-Dicke theory
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Anisotropic massive strings in the scalar-tensor theory of gravitation
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作者 Anil Kumar Yadav 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2013年第7期772-782,共11页
We present the model of an anisotropic universe with string fluid as the source of matter within the framework of the scalar-tensor theory of gravitation. An exact solution of field equations is obtained by applying B... We present the model of an anisotropic universe with string fluid as the source of matter within the framework of the scalar-tensor theory of gravitation. An exact solution of field equations is obtained by applying Berman's law of variation to Hubble's parameter which yields a constant value of the deceleration parameter. The nature of classical potential is examined for the model under consideration. It has also been found that the massive strings dominate in the early universe and finally disap-pear from the universe. This is in agreement with current astronomical observations. The physical and dynamical properties of the model are also discussed. 展开更多
关键词 early universe -- massive strings -- scalar-tensor theory -- classicalpotential
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A Number Theoretic Analysis of the Enthalpy, Enthalpy Energy Density, Thermodynamic Volume, and the Equation of State of a Modified White Hole, and the Implications to the Quantum Vacuum Spacetime, Matter Creation and the Planck Frequency
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作者 Michele Nardelli Amos S. Kubeka Alizera Amani 《Journal of Modern Physics》 2024年第1期1-50,共50页
In this paper, we analyze the enthalpy, enthalpy energy density, thermodynamic volume, and the equation of state of a modified white hole. We obtain new possible mathematical connections with some sectors of Number Th... In this paper, we analyze the enthalpy, enthalpy energy density, thermodynamic volume, and the equation of state of a modified white hole. We obtain new possible mathematical connections with some sectors of Number Theory, Ramanujan Recurring Numbers, DN Constant and String Theory, that enable us to extract the quantum geometrical properties of these thermodynamic equations and the implication to the quantum vacuum spacetime geometry of our early universe as they act as the constraints to the nature of quantum gravity of the universe. 展开更多
关键词 Number theory Ramanujan Recurring Numbers DN Constant string theory Loop Quantum Gravity Matter Creation Enthalpy Energy Density Thermodynamic Volume ENTHALPY
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Theory of Quantum Relativity 被引量:1
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作者 Sudhanva Joshi 《Journal of Quantum Information Science》 2016年第4期249-262,共15页
In this paper, I have studied the properties of atomic and molecular world along with general and special theories of relativity. This is an attempt to merge Gravity into the standard model in order to complete the Gr... In this paper, I have studied the properties of atomic and molecular world along with general and special theories of relativity. This is an attempt to merge Gravity into the standard model in order to complete the Grand Unification Theory. The merger of gravity into the other forces i.e. electromagnetic, strong and weak nuclear forces should be well defined and in the boundaries of Gauge Group theory. The Lorentz transformations used in the theory too are invariant under SU(2) type of space. The relative force exerted on two separate quantum systems is also discussed along with Dark matter and Dark energy at a quantum level. I have also tried to solve the Banach-Tarski theorem by applications of Heisenbergs Uncertainty principle in the later part of the paper. Detailed particle Chirality in standard model is redefined to fit in the criterion of operators used in the same process. Possible existence of a new quasi particle is also included in the paper along with its properties. 展开更多
关键词 Gauge-Group theory string theory G-Bosons Quantum Relativity
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A Note on q-Deformed Two-Dimensional Yang-Mills and Open Topological Strings
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作者 张鹏 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第8期317-322,共6页
In this note we make a test of the open topological string version of the OSV conjecture in the toric Calabi-Yau manifold X = O(-3) → P^2 with background D4-branes wrapped on Lagrangian submanifolds. The Dbrahe par... In this note we make a test of the open topological string version of the OSV conjecture in the toric Calabi-Yau manifold X = O(-3) → P^2 with background D4-branes wrapped on Lagrangian submanifolds. The Dbrahe partition function reduces to an expectation value of some inserted operators of a q-deformed Yang Mills theory living on a chain of P^1 's in the base p2 of X. At large N this partition function can be written as a sum over squares of chiral blocks, which are related to the open topological string amplitudes in the local p2 geometry with branes at both the outer and inner edges of the toric diagram. This is in agreement with the conjecture. 展开更多
关键词 topological string theory 2d Yang-Mills theory OSV conjecture
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Towards Science Unification through Number Theory
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作者 F. M. Sanchez M. H. Grosmann +2 位作者 R. Veysseyre H. Veysseyre D. Weigel 《Advances in Pure Mathematics》 2021年第1期27-62,共36页
The Number Theory comes back as the heart of unified Science, in a Computing Cosmos using the bases 2;3;5;7 whose two symmetric combinations explain the main lepton mass ratios. The corresponding Holic Principle induc... The Number Theory comes back as the heart of unified Science, in a Computing Cosmos using the bases 2;3;5;7 whose two symmetric combinations explain the main lepton mass ratios. The corresponding Holic Principle induces a symmetry between the Newton and Planck constants which confirm the Permanent Sweeping Holography Bang Cosmology, with invariant baryon density 3/10, the dark baryons being dephased matter-antimatter oscillation. This implies the DNA bi-codon mean isotopic mass, confirming to 0.1 ppm the electron-based Topological Axis, whose terminal boson is the base 2 c-observable Universe in the base 3 Cosmos. The physical parameters involve the Euler idoneal numbers and the special Fermat primes of Wieferich (bases 2) and Mirimanoff (base 3). The prime numbers and crystallographic symmetries are related to the 4-fold structure of the DNA bi-codon. The forgotten Eddington’s proton-tau symmetry is rehabilitated, renewing the supersymmetry quest. This excludes the concepts of Multiverse, Continuum, Infinity, Locality and Zero-mass Particle, leading to stringent predictions in Cosmology, Particle Physics and Biology. 展开更多
关键词 Number theory Optimal Computation Principle Holic Principle COSMOLOGY SUPERSYMMETRY string theory Bit-string Physics Cellular Automaton DNA nucleotides CRYSTALLOGRAPHY Sporadic Groups
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What Gravity Is: Alzofon-Ionescu Theory beyond Newton, Einstein, Quantum/Entropy Gravity, etc. A Virequest Project Proposal
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作者 Lucian Miti Ionescu 《Journal of High Energy Physics, Gravitation and Cosmology》 2021年第3期1182-1189,共8页
Gravity is not a fundamental force;in a nut-shell, it is the result of a non-commutative interaction of the “electric” (<i>i.e.</i> Coulomb type) due to fractional charges of the proton and neutron in &l... Gravity is not a fundamental force;in a nut-shell, it is the result of a non-commutative interaction of the “electric” (<i>i.e.</i> Coulomb type) due to fractional charges of the proton and neutron in <i>U</i>(2)-gauge theory, but which have no structure in <i>U</i>(1)-gauge theory, being neutral in itself (neutron), or when compensated by the electronic cloud (proton). This is no longer true at the <i>SU</i>(2) Electroweak Theory level, once spherical 3D-symmetry is broken to a finite Platonic group of symmetry within it Γ → <i>SU</i>(2). The fine splitting of energy levels due to the quark structure (frame basis in <i>SU</i>(2)) of the electric charge can be experimentally controlled using a MASER to invert the population and orient the nuclei the right way to reduce and turn off Gravity. 展开更多
关键词 Quantum Gravity string theory Standard Model
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Detailed string stability analysis for bi-directional optimal velocity model 被引量:1
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作者 郑亮 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第4期1563-1573,共11页
The class of bi-directional optimal velocity models can describe the bi-directional looking effect that usually exists in the reality and is even enhanced with the development of the connected vehicle technologies. It... The class of bi-directional optimal velocity models can describe the bi-directional looking effect that usually exists in the reality and is even enhanced with the development of the connected vehicle technologies. Its combined string stability condition can be obtained through the method of the ring-road based string stability analysis. However, the partial string stability about traffic fluctuation propagated backward or forward was neglected, which will be analyzed in detail in this work by the method of transfer function and its H∞ norm from the viewpoint of control theory. Then, through comparing the conditions of combined and partial string stabilities, their relationships can make traffic flow be divided into three distinguishable regions, displaying various combined and partial string stability performance. Finally, the numerical experiments verify the theoretical results and find that the final displaying string stability or instability performance results from the accumulated and offset effects of traffic fluctuations propagated from different directions. 展开更多
关键词 traffic flow string stability optimal velocity model linearized stability theory transfer function
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The bulk viscous string cosmology in an anisotropic universe with late time acceleration
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作者 Hassan Amirhashchi 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2013年第4期387-398,共12页
A model of a cloud formed by massive strings is used as a source of Bianchi type II cases. We assume that the expansion (θ) in the model is proportional to the shear (σ). To get an exact solution, we consider th... A model of a cloud formed by massive strings is used as a source of Bianchi type II cases. We assume that the expansion (θ) in the model is proportional to the shear (σ). To get an exact solution, we consider the equation of state of the fluid to be in the stiff form. It is found that the bulk viscosity played a very important role in the history of the universe. In the presence of bulk viscosity the particles dominate over strings whereas in the absence of it, strings dominate over the particles, which is not consistent with recent observations. Also we observe that the viscosity causes the expansion of the universe to be accelerating. Our models are evolving from an early decelerating phase to a late time accelerating phase. The physical and geometrical behaviors of these models are discussed. 展开更多
关键词 cosmology: theory -- viscous fluid -- massive string
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Faster than the Speed of Light Is a Quantum Phenomena
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作者 Ardeshir Irani 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2023年第2期379-382,共4页
Classical Mechanics using Einstein’s theories of relativity places a limit on speed as the speed of light. Quantum Mechanics has no such limitation. To understand space accelerating faster than the speed of light and... Classical Mechanics using Einstein’s theories of relativity places a limit on speed as the speed of light. Quantum Mechanics has no such limitation. To understand space accelerating faster than the speed of light and information being exchanged instantaneously between two entangled electrons separated by huge distances, one uses Planck’s length, Planck’s time, and Planck’s mass to indicate that space and time are discrete and therefore along with masses smaller than Planck’s mass are Quantum Mechanical in nature. Faster than the speed of light c = 3 × 10<sup>8</sup> m/s is a classical effect only in dimensions of space lower than our 3-D Universe, but it is a Quantum effect in all dimensions of space. Because space can oscillate sending out ripples from the source, it is the medium used for transporting light waves and gravity waves. 展开更多
关键词 Faster than the Speed of Light CLASSICAL QUANTUM Planck’s Units Space as a Medium Comparison with string theory
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Geodesics of Spherical Dilaton Spacetimes 被引量:1
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作者 曾艺 吕君丽 王永久 《Chinese Physics Letters》 SCIE CAS CSCD 2006年第6期1648-1651,共4页
The properties of spherical dilaton black hole spacetimes are investigated through a study of their geodesics. The closed and non-closed orbits of test particles are analysed using the effective potential and phase-pl... The properties of spherical dilaton black hole spacetimes are investigated through a study of their geodesics. The closed and non-closed orbits of test particles are analysed using the effective potential and phase-plane method. The stability and types of orbits are determined in terms of the energy and angular momentum of the test particles. The conditions of the existence of circular orbits for a spherical dilaton spacetime with an arbitrary dilaton coupling constant α are obtained. The properties of the orbits and in particular the position of the innermost stable circular orbit are compared to those of the Reissner-Nordstrom spacetime. The circumferential radius of innermost stable circular orbit and the corresponding angular momentum of the test particles increase for α≠ 0. 展开更多
关键词 CHARGED BLACK-HOLE string theory
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Calculation of <i>G</i>Gravity Constant from the Mass and Electron Charge, and Fine Structure Constant 被引量:1
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作者 Valentino Straser 《Journal of Modern Physics》 2021年第8期1172-1181,共10页
This study proposes, from the theoretical point of view, the calculation of the gravitational constant <em>G</em>, made starting from the charge and the electron mass, taking the constant of the Fine Struc... This study proposes, from the theoretical point of view, the calculation of the gravitational constant <em>G</em>, made starting from the charge and the electron mass, taking the constant of the Fine Structure into examination. In the empty space, couples of virtual positron electrons dematerialize, giving virtual photon origin. They, at their time, will become electrons, positrons and so on. These transformations are made keeping the board of their “amount of movement” and when they meet the matter, these couples come, reissued depending on the field and on the matter mass. The matter is the change of the trend of their gyromagnetic movement relationship which puts under pressure. In presence of two masses, this gyromagnetic movement relationship is already partially oriented towards the other mass. From here a force is established between these two masses that give as calculated constant equal to 6.678532. This value of <em>G</em>, obtained leaving from the charge and the electron mass, is very near the experimental values estimated in these last decades regard the value of the gravitational constant of <em>G</em>. 展开更多
关键词 ELECTRON POSITRON Gravitational Constant string theory theory of Everything Fine Structure Constant
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Space, Time, and the Creation of Universe
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作者 Zhi Gang Sha Rulin Xiu 《Journal of Philosophy Study》 2017年第2期66-74,共9页
The understanding about the creation of our universe is explored in many philosophies, natural sciences, religions, ideologies, traditions, and disciplines. Current natural science cannot answer this question at the f... The understanding about the creation of our universe is explored in many philosophies, natural sciences, religions, ideologies, traditions, and disciplines. Current natural science cannot answer this question at the fundamental level. In this work, we combine the ancient Chinese Tao wisdom about the creation with quantum physics. We propose that everything comes from the emptiness. Our universe is manifested from the emptiness through two pairs of duality measurements: space and time duality pair and inclusion and exclusion duality pair. From this understanding, we are able to derive one mathematic formula describing our universe. It also yields a new metaphysical approach to derive and interpret string theory as well as produce more testable predictions from string theory. This work gives a new way to understand and mathematically describe how our universe is created and evolved. It provides another way to comprehend the meaning and function of space and time. It indicates that our universe is manifested from the emptiness through human actions. Space and time is a pair of duality action and codes that help manifest our universe. It provides answer to an important philosophical question about whether and why we can understand and mathematically describe our universe. 展开更多
关键词 SPACE TIME creation of universe string theory Tao wisdom quantum physics measurement theory duality MANIFESTATION grand unification theory
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