why do physicists think that there are extra dimensions
... the physics of extra dimensions is a revolution in the making like the quantum mechanics revolution of the 1920’s, it is the result of many new ideas (from many people) coming together to give a radically new picture of physics and of the universe ...
... the physics of extra dimensions is a revolution in the making like the quantum mechanics revolution of the 1920’s, it is the result of many new ideas (from many people) coming together to give a radically new picture of physics and of the universe ...
Ross.pdf
... Since others at this meeting will talk about string theories themselves, I will concentrate on the question how is unification changed in superstring theories? String theory is the only candidate we have for a unification of all the fundamental in- ...
... Since others at this meeting will talk about string theories themselves, I will concentrate on the question how is unification changed in superstring theories? String theory is the only candidate we have for a unification of all the fundamental in- ...
F From Vibrating Strings to a Unified Theory of All Interactions
... energetic (zero-mass) photons. In the relativistic string, energy/mass conversion occurs classically. Imagine beginning with an infinitesimally short relativistic string and stretching it out to some length L. Since the string tension is constant, the work done on the string is equal to the product ...
... energetic (zero-mass) photons. In the relativistic string, energy/mass conversion occurs classically. Imagine beginning with an infinitesimally short relativistic string and stretching it out to some length L. Since the string tension is constant, the work done on the string is equal to the product ...
Superstring Theory
... • For the first time, physicists had a unified theory that could accommodate both Einstein’s explanation for gravity and the quantum explanation for particles and other forces. • To make the math work you needed several additional dimensions of space. Instead of a four-dimensional universe — three s ...
... • For the first time, physicists had a unified theory that could accommodate both Einstein’s explanation for gravity and the quantum explanation for particles and other forces. • To make the math work you needed several additional dimensions of space. Instead of a four-dimensional universe — three s ...
N = 8 Supergravity, and beyond - Higgs Centre for Theoretical Physics
... • General Relativity: gravity from space-time curvature (general covariance and equivalence principle). • Standard Model of Particle Physics: combines quantum mechanics and special relativity to describe Matter = three generations of 16 spin- 12 fermions Forces = electromagnetic, weak and strong via ...
... • General Relativity: gravity from space-time curvature (general covariance and equivalence principle). • Standard Model of Particle Physics: combines quantum mechanics and special relativity to describe Matter = three generations of 16 spin- 12 fermions Forces = electromagnetic, weak and strong via ...
Recent Developments in String Theory
... The observed elementary particles and their interactions are described by what is called the “Standard Model” of particle physics. This is a certain framework of formulas and field theoretic rules, developed over the past 50 years, by which we can describe many subatomic phenomena with stunning accu ...
... The observed elementary particles and their interactions are described by what is called the “Standard Model” of particle physics. This is a certain framework of formulas and field theoretic rules, developed over the past 50 years, by which we can describe many subatomic phenomena with stunning accu ...
PDF Transparencies
... MQCD do not agree, even qualitatively. The former has metastable vacua which the latter does not. ...
... MQCD do not agree, even qualitatively. The former has metastable vacua which the latter does not. ...
Exceptional Lie Groups, E-infinity Theory and
... 3. MSSM and the number of the Higgs particles A minimal supersymmetric extension of the standard model (MSSM) by El-Naschie, predicted that the total number of the particles in the standard model is 66 particles. These are the known 60 experimentally confirmed particles, 5 massive spin zero Higgs b ...
... 3. MSSM and the number of the Higgs particles A minimal supersymmetric extension of the standard model (MSSM) by El-Naschie, predicted that the total number of the particles in the standard model is 66 particles. These are the known 60 experimentally confirmed particles, 5 massive spin zero Higgs b ...
String Backgrounds
... E.o.m. follow from combination of spacetime action and worldsheet coupling to two-form ...
... E.o.m. follow from combination of spacetime action and worldsheet coupling to two-form ...
Wu-yen Chuang Curriculum Vitae
... • Postdoctoral Research Associate, Rutgers University, 2007–2010 • Ph.D. in Physics, Stanford University, 2001–2007 Thesis: Geometric Transitions, Topological Strings, and Generalized Complex Geometry Advisors: Michael E. Peskin, Shamit Kachru • B.S. in Physics, National Tsing-Hua University, Taiwan ...
... • Postdoctoral Research Associate, Rutgers University, 2007–2010 • Ph.D. in Physics, Stanford University, 2001–2007 Thesis: Geometric Transitions, Topological Strings, and Generalized Complex Geometry Advisors: Michael E. Peskin, Shamit Kachru • B.S. in Physics, National Tsing-Hua University, Taiwan ...
Untitled - College of William and Mary
... superconductors. However, BCS theory alone cannot describe materials who superconduct at higher temperatures; this has led to widespread effort to develop theories which accurately describe these materials. Indeed, this effort has not escaped the notice of particle physicists, who have developed the ...
... superconductors. However, BCS theory alone cannot describe materials who superconduct at higher temperatures; this has led to widespread effort to develop theories which accurately describe these materials. Indeed, this effort has not escaped the notice of particle physicists, who have developed the ...
Search for: HOME TOPICS ARCHIVE ABOUT THOUGHT
... Case in point: String theory. The darling of many theorists, string theory represents the basic building blocks of matter as vibrating strings. The strings take on different properties depending on their modes of vibration, just as the strings of a violin produce different notes depending on how the ...
... Case in point: String theory. The darling of many theorists, string theory represents the basic building blocks of matter as vibrating strings. The strings take on different properties depending on their modes of vibration, just as the strings of a violin produce different notes depending on how the ...
Review. Geometry and physics
... The impact of these discoveries on mathematics has been profound and widespread. Areas of mathematics such as topology and algebraic geometry, which lie at the heart of pure mathematics and appear very distant from the physics frontier, have been dramatically affected. This development has led to ma ...
... The impact of these discoveries on mathematics has been profound and widespread. Areas of mathematics such as topology and algebraic geometry, which lie at the heart of pure mathematics and appear very distant from the physics frontier, have been dramatically affected. This development has led to ma ...
GCOE13_5
... • The bare Higgs mass becomes close to zero at the string scale. It implies that SUSY is restored at the string scale. Actually there are many string vacua in which SUSY is spontaneously broken at the string scale. • The Higgs self coupling also becomes close to zero at the string scale. It indicate ...
... • The bare Higgs mass becomes close to zero at the string scale. It implies that SUSY is restored at the string scale. Actually there are many string vacua in which SUSY is spontaneously broken at the string scale. • The Higgs self coupling also becomes close to zero at the string scale. It indicate ...
Slide 1
... • Not explained in SM, that’s just how it is (this is one of the things we would like to explain) • Then if e,q have mass, can go to their rest frame, rotate ordinary spin so L ↔ R, but then they have the wrong EW spin, so inconsistent – only two ways out ...
... • Not explained in SM, that’s just how it is (this is one of the things we would like to explain) • Then if e,q have mass, can go to their rest frame, rotate ordinary spin so L ↔ R, but then they have the wrong EW spin, so inconsistent – only two ways out ...
string theory: big problem for small size
... Calabi-Yau manifolds are a class of 6-dimensional manifolds. When they are used as the compactified manifolds in the string theory they give rise to 4-dimensional space-time theories. Thus, compactification acts as one of the important mechanism to extract real-world physics from string theory. The ...
... Calabi-Yau manifolds are a class of 6-dimensional manifolds. When they are used as the compactified manifolds in the string theory they give rise to 4-dimensional space-time theories. Thus, compactification acts as one of the important mechanism to extract real-world physics from string theory. The ...
Strings as hadrons
... that time. It was soon discovered by Yoichiro Nambu of the University of Chicago and myself (and in a slightly different form by Holger Bech Nielsen at the Niels Bohr Institute) that these amplitudes were the solution of a definite physical system that consists of extended 1D elastic strings. For th ...
... that time. It was soon discovered by Yoichiro Nambu of the University of Chicago and myself (and in a slightly different form by Holger Bech Nielsen at the Niels Bohr Institute) that these amplitudes were the solution of a definite physical system that consists of extended 1D elastic strings. For th ...
Unruh Effect in Closed String Theory
... in Rindler space-time by the combination of the solutions of Klein-Gordon eq. in Minkowski space-time, it would be OK! Minkowski ...
... in Rindler space-time by the combination of the solutions of Klein-Gordon eq. in Minkowski space-time, it would be OK! Minkowski ...
The Elegant Universe: Part 2
... NARRATOR: Obsession drives scientists to pursue the Holy Grail of physics, but are they ready for what they discover? Step into the bizarre world of the Elegant Universe right now. BRIAN GREENE: It's a little known secret but for more than half a century a dark cloud has been looming over modern sci ...
... NARRATOR: Obsession drives scientists to pursue the Holy Grail of physics, but are they ready for what they discover? Step into the bizarre world of the Elegant Universe right now. BRIAN GREENE: It's a little known secret but for more than half a century a dark cloud has been looming over modern sci ...
BernTalk
... understanding gravity. • Interface of string theory and field theory– certain features clearer in string theory, especially at tree level. KLT classic example. • Can we carry over Berkovits string theory pure spinor formalism to field theory? Should help expose full susy. • Higher-dimensional method ...
... understanding gravity. • Interface of string theory and field theory– certain features clearer in string theory, especially at tree level. KLT classic example. • Can we carry over Berkovits string theory pure spinor formalism to field theory? Should help expose full susy. • Higher-dimensional method ...
String theory to the rescue - KITP - University of California, Santa
... reflection of a scientific one. But let me first analyze the sociology a bit further. One might think that my claim is circular: “Of course, string theorists work on string theory.” But science does not fall into such narrow silos. Indeed, it is striking that, with few exceptions, those who have con ...
... reflection of a scientific one. But let me first analyze the sociology a bit further. One might think that my claim is circular: “Of course, string theorists work on string theory.” But science does not fall into such narrow silos. Indeed, it is striking that, with few exceptions, those who have con ...
Baryon Chemical Potential in AdS/CFT
... 3. Take near-horizon limit to make the unwanted modes (like gravity in the YM side) decoupled. 4. Take appropriate limits to make the supergravity approximation valid, if necessary. ...
... 3. Take near-horizon limit to make the unwanted modes (like gravity in the YM side) decoupled. 4. Take appropriate limits to make the supergravity approximation valid, if necessary. ...
String theory
In physics, string theory is a theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings. String theory describes how these strings propagate through space and interact with each other. On distance scales larger than the string scale, a string looks just like an ordinary particle, with its mass, charge, and other properties determined by the vibrational state of the string. In string theory, one of the many vibrational states of the string corresponds to the graviton, a quantum mechanical particle that carries gravitational force. Thus string theory is a theory of quantum gravity.String theory is a broad and varied subject that attempts to address a number of deep questions of fundamental physics. String theory has been applied to a variety of problems in black hole physics, early universe cosmology, nuclear physics, and condensed matter physics, and it has stimulated a number of major developments in pure mathematics. Because string theory potentially provides a unified description of gravity and particle physics, it is a candidate for a theory of everything, a self-contained mathematical model that describes all fundamental forces and forms of matter. Despite much work on these problems, it is not known to what extent string theory describes the real world or how much freedom the theory allows to choose the details.String theory was first studied in the late 1960s as a theory of the strong nuclear force, before being abandoned in favor of quantum chromodynamics. Subsequently, it was realized that the very properties that made string theory unsuitable as a theory of nuclear physics made it a promising candidate for a quantum theory of gravity. The earliest version of string theory, bosonic string theory, incorporated only the class of particles known as bosons. It later developed into superstring theory, which posits a connection called supersymmetry between bosons and the class of particles called fermions. Five consistent versions of superstring theory were developed before it was conjectured in the mid-1990s that they were all different limiting cases of a single theory in eleven dimensions known as M-theory. In late 1997, theorists discovered an important relationship called the AdS/CFT correspondence, which relates string theory to another type of physical theory called a quantum field theory.One of the challenges of string theory is that the full theory does not yet have a satisfactory definition in all circumstances. Another issue is that the theory is thought to describe an enormous landscape of possible universes, and this has complicated efforts to develop theories of particle physics based on string theory. These issues have led some in the community to criticize these approaches to physics and question the value of continued research on string theory unification.