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Quantum Black Holes
... • Would a minimal length impact BHs solutions and their phenomenology at the LHC? See talk of Piero Nicolini ...
... • Would a minimal length impact BHs solutions and their phenomenology at the LHC? See talk of Piero Nicolini ...
Angular Momentum of Dark Matter Black Holes
... In [3] the proposal was made that the Milky Way dark halo is a plum pudding with, as “plums”, PIMBHs in the mass range of Eq.(1) making up 100% of the dark matter. On the other hand, in Figure 9 of ROM [9], there is displayed an upper limit of less than 0.01% of the dark matter for this mass range ...
... In [3] the proposal was made that the Milky Way dark halo is a plum pudding with, as “plums”, PIMBHs in the mass range of Eq.(1) making up 100% of the dark matter. On the other hand, in Figure 9 of ROM [9], there is displayed an upper limit of less than 0.01% of the dark matter for this mass range ...
An introduction to spherically symmetric loop quantum gravity black
... the past horizon and the past null infinity. This vacuum has singularity issues at the past horizon as well. Hawking radiation can be computed comparing quantities like the number operator in the Boulware and Unruh vacua. As is well known one ends up with a purely thermal spectrum with a temperture ...
... the past horizon and the past null infinity. This vacuum has singularity issues at the past horizon as well. Hawking radiation can be computed comparing quantities like the number operator in the Boulware and Unruh vacua. As is well known one ends up with a purely thermal spectrum with a temperture ...
On cosmology in the laboratory
... So far, experiments in three areas of physics have been performed to test the physics of the event horizon: in optics [13,15,19,20,23], fluid mechanics [14,17,18,22] and the physics of ultracold atoms [16,21]. None of these experiments has unambiguously shown Hawking radiation so far, but most of th ...
... So far, experiments in three areas of physics have been performed to test the physics of the event horizon: in optics [13,15,19,20,23], fluid mechanics [14,17,18,22] and the physics of ultracold atoms [16,21]. None of these experiments has unambiguously shown Hawking radiation so far, but most of th ...
QFT in curved space-time
... Pure GR is finite to one-loop order (i.e. the divergences cancel due to an analogue of the Ward identity) but not in higher orders or if coupled to matter. Next step: supergravity. Make the theory supersymmetric, add a gravitino (spin 3/2), to cancel some divergences. Highest dimension (with one tim ...
... Pure GR is finite to one-loop order (i.e. the divergences cancel due to an analogue of the Ward identity) but not in higher orders or if coupled to matter. Next step: supergravity. Make the theory supersymmetric, add a gravitino (spin 3/2), to cancel some divergences. Highest dimension (with one tim ...
Lesson 5 - Standards Solution
... don’t know the meaning of the word being asked, they should use context clues. Context clues are hints in the text that help the reader understand the word. These clues might be found in the same sentence as the word, or they might be part of a sentence that comes before or after the unknown word. E ...
... don’t know the meaning of the word being asked, they should use context clues. Context clues are hints in the text that help the reader understand the word. These clues might be found in the same sentence as the word, or they might be part of a sentence that comes before or after the unknown word. E ...
Special Theory of Relativity
... floating in space far from gravitational effects. One person is outside the ship and the other is inside. ...
... floating in space far from gravitational effects. One person is outside the ship and the other is inside. ...
From Black Holes to Cosmology : The Universe in the
... that have been observed in distant galaxies. They can last from ten milliseconds to several minutes, and their light curves vary considerably from one event to another. Two relatively distinct groups can nevertheless be identified: short bursts (SGRB), representing about one-third of those observed, ...
... that have been observed in distant galaxies. They can last from ten milliseconds to several minutes, and their light curves vary considerably from one event to another. Two relatively distinct groups can nevertheless be identified: short bursts (SGRB), representing about one-third of those observed, ...
The Black Hole Information Paradox and the Collapse of the Wave
... universe that are accessible to them, there is no loss of predictably. However, the inclusion of quantum effects leads to a picture where, at late times, there is no residual evidence of regions that are inaccessible to anybody (beyond the fact that the past is inaccessible to everybody) and so it s ...
... universe that are accessible to them, there is no loss of predictably. However, the inclusion of quantum effects leads to a picture where, at late times, there is no residual evidence of regions that are inaccessible to anybody (beyond the fact that the past is inaccessible to everybody) and so it s ...
My Presentation
... The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. The theory was published in 1916. The gravitational force is strong near a black hole because all the black hole's matter is concentrated at ...
... The fundamental descriptions of black holes are based on equations in the theory of general relativity developed by the German-born physicist Albert Einstein. The theory was published in 1916. The gravitational force is strong near a black hole because all the black hole's matter is concentrated at ...
Lecture14
... as it passes close to a massive object because A. the massive object exerts an electromagnetic force on the photons. B. the photons exert an electromagnetic force on the massive object. C. it follows the curvature of the space around the massive object. D. the speed of light increases. E. the speed ...
... as it passes close to a massive object because A. the massive object exerts an electromagnetic force on the photons. B. the photons exert an electromagnetic force on the massive object. C. it follows the curvature of the space around the massive object. D. the speed of light increases. E. the speed ...
Solutions to Homework #6, AST 203, Spring 2012
... is so massively complicated that the only time they were all bound together in a single volume they underwent gravitational collapse and became a Black Hole.” Chapter 17 of Life, the Universe and Everything, the third volume of the Hitchhiker’s Guide to the Galaxy series (1982, Douglas Adams) A quot ...
... is so massively complicated that the only time they were all bound together in a single volume they underwent gravitational collapse and became a Black Hole.” Chapter 17 of Life, the Universe and Everything, the third volume of the Hitchhiker’s Guide to the Galaxy series (1982, Douglas Adams) A quot ...
Bell ringer... 12/3-12/4
... balance between the outward force of their momentum acting agains the suns gravity e- likewise have outward momentum acting in contrast to the inward pull of their charge attraction ...
... balance between the outward force of their momentum acting agains the suns gravity e- likewise have outward momentum acting in contrast to the inward pull of their charge attraction ...
Lecture 19 Review
... We have talked about our Sun. From a large gas cloud it collapses to a protostar, heating up, compressing, finally igniting. In the process planets are formed from some remaining high angular momentum solar gas and dust particles. A great deal of gas and dust is blown off in the process. This all ha ...
... We have talked about our Sun. From a large gas cloud it collapses to a protostar, heating up, compressing, finally igniting. In the process planets are formed from some remaining high angular momentum solar gas and dust particles. A great deal of gas and dust is blown off in the process. This all ha ...
Lec11_ch13_blackholes
... Black Holes Evaporate • According to quantum mechanics, the vacuum is actually a sea of particles and antiparticles spontaneously appearing and then annihilating each other • Near the event horizon of a black hole, some virtual particles are trapped while their counterparts escape. Via this Hawking ...
... Black Holes Evaporate • According to quantum mechanics, the vacuum is actually a sea of particles and antiparticles spontaneously appearing and then annihilating each other • Near the event horizon of a black hole, some virtual particles are trapped while their counterparts escape. Via this Hawking ...
Controlled Hawking Process by Quantum Information
... The argument does not require un-established physics of quantum gravity. By using only semi-classical analysis, we can make significant statements about memory of black holes. In classical description of black holes, after the outside spacetimes are stabilized, they forget any memories except mass, ...
... The argument does not require un-established physics of quantum gravity. By using only semi-classical analysis, we can make significant statements about memory of black holes. In classical description of black holes, after the outside spacetimes are stabilized, they forget any memories except mass, ...
Black hole spectroscopy from Loop Quantum Gravity models
... the existence of a non trivial (γ-dependent) chemical potential conjugate to the number of horizon punctures. The problem of the observability of the puncture number is resolved by taking into account contributions to the area degeneracy coming from the matter sector. As suggested by the semiclassic ...
... the existence of a non trivial (γ-dependent) chemical potential conjugate to the number of horizon punctures. The problem of the observability of the puncture number is resolved by taking into account contributions to the area degeneracy coming from the matter sector. As suggested by the semiclassic ...
Black Holes - Wayne State University Physics and Astronomy
... As the particles whirl closer to the event horizon, the friction can heat them to about 100 million kelvins, which is hot enough for the emission of X-rays Since X-ray sources in the Galaxy are rare, if you find an X-ray source, then you know something strange is happening with the object If the uns ...
... As the particles whirl closer to the event horizon, the friction can heat them to about 100 million kelvins, which is hot enough for the emission of X-rays Since X-ray sources in the Galaxy are rare, if you find an X-ray source, then you know something strange is happening with the object If the uns ...
Slide 1
... acceleration. Or Dg =-2GM/r3 Dr -> How did I get this? Example 8.3-What is the difference in the acceleration of gravity at the feet to the head on an astronaut whose height is 2 meters drifting into a black hole of 1 Solar mass ->r = 3km and how does this compare With the gravitational acceleration ...
... acceleration. Or Dg =-2GM/r3 Dr -> How did I get this? Example 8.3-What is the difference in the acceleration of gravity at the feet to the head on an astronaut whose height is 2 meters drifting into a black hole of 1 Solar mass ->r = 3km and how does this compare With the gravitational acceleration ...
News Analysis - Learning Space
... Two Black Holes (one, 36 times the mass of the Sun and the other 29 times the mass of Sun), 1.3 billion light years away from Earth, orbiting around each other collided and merged into a single massive black hole of 62 times the mass of Sun. As per the Theory of General Relativity, the pair of bla ...
... Two Black Holes (one, 36 times the mass of the Sun and the other 29 times the mass of Sun), 1.3 billion light years away from Earth, orbiting around each other collided and merged into a single massive black hole of 62 times the mass of Sun. As per the Theory of General Relativity, the pair of bla ...
Hawking radiation
![](https://commons.wikimedia.org/wiki/Special:FilePath/BH_LMC.png?width=300)
Hawking radiation is black body radiation that is predicted to be released by black holes, due to quantum effects near the event horizon. It is named after the physicist Stephen Hawking, who provided a theoretical argument for its existence in 1974, and sometimes also after Jacob Bekenstein, who predicted that black holes should have a finite, non-zero temperature and entropy.Hawking's work followed his visit to Moscow in 1973 where the Soviet scientists Yakov Zeldovich and Alexei Starobinsky showed him that, according to the quantum mechanical uncertainty principle, rotating black holes should create and emit particles. Hawking radiation reduces the mass and energy of black holes and is therefore also known as black hole evaporation. Because of this, black holes that lose more mass than they gain through other means are expected to shrink and ultimately vanish. Micro black holes are predicted to be larger net emitters of radiation than larger black holes and should shrink and dissipate faster.In September 2010, a signal that is closely related to black hole Hawking radiation (see analog gravity) was claimed to have been observed in a laboratory experiment involving optical light pulses. However, the results remain unverified and debatable. Other projects have been launched to look for this radiation within the framework of analog gravity. In June 2008, NASA launched the Fermi space telescope, which is searching for the terminal gamma-ray flashes expected from evaporating primordial black holes. In the event that speculative large extra dimension theories are correct, CERN's Large Hadron Collider may be able to create micro black holes and observe their evaporation.