UNSTRUNG
... entire mass of what is now the observable universe was packed into a volume the size of an atom. At that tiny scale, quantum uncertainty causes the smooth geometry of general relativity to break up, and there is no telling how gravity will behave. To understand the birth of the universe, we need a t ...
... entire mass of what is now the observable universe was packed into a volume the size of an atom. At that tiny scale, quantum uncertainty causes the smooth geometry of general relativity to break up, and there is no telling how gravity will behave. To understand the birth of the universe, we need a t ...
Lecture 24 - Black Holes - University of Iowa Astrophysics
... (one with angular momentum) has an ergosphere around the outside of the event horizon • In the ergosphere, space and time themselves are dragged along with the rotation of the black hole ...
... (one with angular momentum) has an ergosphere around the outside of the event horizon • In the ergosphere, space and time themselves are dragged along with the rotation of the black hole ...
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 ...
Compact dimensions
... fields could propagate… but they do not show any such effects… We require that only gravity should ‘see’ extra dimensions … other interactions should not ! ...
... fields could propagate… but they do not show any such effects… We require that only gravity should ‘see’ extra dimensions … other interactions should not ! ...
ANSWER KEY to Black Hole Discussion Questions We could not
... 3. Building the star with more layers of gas (represented by the foil) would make the star more massive. It would also result in the formation of a more massive black hole, since there would be more material with which to form the black hole. 4. Although they have a different size, since they are ma ...
... 3. Building the star with more layers of gas (represented by the foil) would make the star more massive. It would also result in the formation of a more massive black hole, since there would be more material with which to form the black hole. 4. Although they have a different size, since they are ma ...
Black Holes : A lecture to 6th Formers
... Newtonian physics also gives us redshift, but it is Einstein’s perspective that tells us time is slowing down. It also tells us space warps around any massive object. The spacetime around a star or planet or black hole is known as the SCHWARZSCHILD SOLUTION. The distance from the planet or star is s ...
... Newtonian physics also gives us redshift, but it is Einstein’s perspective that tells us time is slowing down. It also tells us space warps around any massive object. The spacetime around a star or planet or black hole is known as the SCHWARZSCHILD SOLUTION. The distance from the planet or star is s ...
20071031110012301
... ► Factorization of three-particle world-sheet S-matrix in near-flat AdS5 x S5 to one loop in string σ-model ...
... ► Factorization of three-particle world-sheet S-matrix in near-flat AdS5 x S5 to one loop in string σ-model ...
Untitled - School of Natural Sciences
... universe with gravity. The three-dimensional universe would emerge from the physics of the two-dimensional universe somewhat like a holographic image arising from a hologram. The two-dimensional universe exists on the boundary of the three-dimensional universe. The physics on the boundary looks like ...
... universe with gravity. The three-dimensional universe would emerge from the physics of the two-dimensional universe somewhat like a holographic image arising from a hologram. The two-dimensional universe exists on the boundary of the three-dimensional universe. The physics on the boundary looks like ...
Slides2 - WordPress.com
... decode a significant portion of the Hawking radiation and then dive into the black hole to examine the infalling pairs. They showed that the decoding proses last for such a long time that black hole would evaporate entirely before the observer was ready to jump! So their claim is “There is no fundam ...
... decode a significant portion of the Hawking radiation and then dive into the black hole to examine the infalling pairs. They showed that the decoding proses last for such a long time that black hole would evaporate entirely before the observer was ready to jump! So their claim is “There is no fundam ...
Black Holes - Solar Physics and Space Weather
... 1. What are the two central ideas behind Einstein’s special theory of relativity? 2. How do astronomers search for black holes? 3. What are super massive black holes, and where are they found? 4. In what sense is a black hole “black”? 5. In what way are black holes actually simpler than any other ob ...
... 1. What are the two central ideas behind Einstein’s special theory of relativity? 2. How do astronomers search for black holes? 3. What are super massive black holes, and where are they found? 4. In what sense is a black hole “black”? 5. In what way are black holes actually simpler than any other ob ...
string theory: big problem for small size
... The original string theory developed in the period 1968–70 was known as bosonic string theory. The main disadvantages of this theory were: (i) it needs 26-dimensional space-time, (ii) the absence of fermions in the theory, and (iii) the existence of a particle with imaginary mass, called tachyon, ge ...
... The original string theory developed in the period 1968–70 was known as bosonic string theory. The main disadvantages of this theory were: (i) it needs 26-dimensional space-time, (ii) the absence of fermions in the theory, and (iii) the existence of a particle with imaginary mass, called tachyon, ge ...
Ground-based Astronomy: Past, Present, and Future
... star or a black hole. Walking uphill (outwards) is analogous to moving radially outward from the dense object. Note that you walk a long way on the surface but the radius does not change very much. The usual formula of the circumference = 2R is wrong … the circumference is smaller than you expect. ...
... star or a black hole. Walking uphill (outwards) is analogous to moving radially outward from the dense object. Note that you walk a long way on the surface but the radius does not change very much. The usual formula of the circumference = 2R is wrong … the circumference is smaller than you expect. ...
Strings as hadrons
... All of this raises an interesting question. What determines the compactification moduli in the real world of experience? Is there some principle that selects a special value of the moduli of a particular Calabi-Yau space and therefore determines the parameters of the theory such as the masses of par ...
... All of this raises an interesting question. What determines the compactification moduli in the real world of experience? Is there some principle that selects a special value of the moduli of a particular Calabi-Yau space and therefore determines the parameters of the theory such as the masses of par ...
Solving quantum field theories via curved spacetimes
... terms of particles locally splitting or joining with other particles. Yet in many interesting physical problems, the coupling is so strong that such an expansion is not feasible. To further complicate matters, the coupling typically depends on the characteristic energy of a process. In QCD, perturba ...
... terms of particles locally splitting or joining with other particles. Yet in many interesting physical problems, the coupling is so strong that such an expansion is not feasible. To further complicate matters, the coupling typically depends on the characteristic energy of a process. In QCD, perturba ...
Black Holes - WhatsOutThere
... How does a black hole form? • A black hole forms when an objects gravity causes it to collapse to a small point. Stellar mass black holes form when a huge star cannot produce energy in its core. Radiation from the stars nuclear reactions to keep the star “alive,” gravity causes the stars core to ev ...
... How does a black hole form? • A black hole forms when an objects gravity causes it to collapse to a small point. Stellar mass black holes form when a huge star cannot produce energy in its core. Radiation from the stars nuclear reactions to keep the star “alive,” gravity causes the stars core to ev ...
Lecture 18
... electrons and positrons that pop into existence and then annihilate without any net effect. Above a black hole, one can get sucked in. The other annihilates above the surface to cause radiation. Since its close to the surface, the light gets redshifted escaping, but it carries energy with it! ...
... electrons and positrons that pop into existence and then annihilate without any net effect. Above a black hole, one can get sucked in. The other annihilates above the surface to cause radiation. Since its close to the surface, the light gets redshifted escaping, but it carries energy with it! ...
by Margaret L. Silbar
... There were, .however, some problems. To mesh with quantum mechanics and with special relativity, the spacetime in which the relativistic string moves around must have an uncommon number of dimensions-—for example, 10, or perhaps as many as 26. Otherwise, the theory predicts that some processes would ...
... There were, .however, some problems. To mesh with quantum mechanics and with special relativity, the spacetime in which the relativistic string moves around must have an uncommon number of dimensions-—for example, 10, or perhaps as many as 26. Otherwise, the theory predicts that some processes would ...
The String Theory Landscape
... At the Tevatron at Fermilab, we are already exploring a new regime of energy and distance. In three years, we will start to explore much greater energies at the LHC. It is quite likely that we will stumble on remarkable, new features of nature: new symmetries, large extra dimensions, warping of spac ...
... At the Tevatron at Fermilab, we are already exploring a new regime of energy and distance. In three years, we will start to explore much greater energies at the LHC. It is quite likely that we will stumble on remarkable, new features of nature: new symmetries, large extra dimensions, warping of spac ...
ASTRONOMY 5
... The horizon mass today is about 1060 g, and the fluctuation time for such a large mass turns out to be 10-108 sec! 4) Can the horizon mass actually fluctuate by that amount today, even in principle? No, because it turns out there is a second requirementthe system cannot be too big. A quantum fluct ...
... The horizon mass today is about 1060 g, and the fluctuation time for such a large mass turns out to be 10-108 sec! 4) Can the horizon mass actually fluctuate by that amount today, even in principle? No, because it turns out there is a second requirementthe system cannot be too big. A quantum fluct ...
A unique theory of all forces 1 The Standard Model and Unification
... We have previously stressed that the ultraviolet infinities of the various field theories are due to the fact that they describe pointlike objects. In the case of gravity the short distance divergences are so strong that, if we want to construct a quantum theory of gravity, we are obliged to abandon ...
... We have previously stressed that the ultraviolet infinities of the various field theories are due to the fact that they describe pointlike objects. In the case of gravity the short distance divergences are so strong that, if we want to construct a quantum theory of gravity, we are obliged to abandon ...
AlumniDay_IOP_2 - Princeton University
... the new (Planck scale, 1019 GeV) is of unprecedented size. Do we really expect pure thought to take us so far? • String theory has morphed into a subject that is more like math than physics (some folks say): its priorities are no longer set by physics issues. • Despite all these complaints, some of ...
... the new (Planck scale, 1019 GeV) is of unprecedented size. Do we really expect pure thought to take us so far? • String theory has morphed into a subject that is more like math than physics (some folks say): its priorities are no longer set by physics issues. • Despite all these complaints, some of ...
Rapporteur 4: Theory summary (30) Larry McLerran
... The evidence is strong that one has made a system of quarks and gluons which is to a good to fair approximation explained by a ...
... The evidence is strong that one has made a system of quarks and gluons which is to a good to fair approximation explained by a ...
The beauty of string theory - Institute for Advanced Study
... What about those astronomical mysteries we started with? None of the problems yet has any definitive solution, but physicists suspect solutions are linked to the exploration of supersymmetry, string theory, and the quantum nature of space-time. First, although other possibilities exist, many physici ...
... What about those astronomical mysteries we started with? None of the problems yet has any definitive solution, but physicists suspect solutions are linked to the exploration of supersymmetry, string theory, and the quantum nature of space-time. First, although other possibilities exist, many physici ...
transparencies - Indico
... to know about space far from the brane? With Andreas Karch, found four-dimensional gravity near the brane ...
... to know about space far from the brane? With Andreas Karch, found four-dimensional gravity near the brane ...