wipf a quantum fields near black holes
the quantum physics of black holes and string theory
... we have regarded the BPS states as states of a quantum system, but a similar analysis applies to classical solutions. In 10-dimensional su- pergravity, the branes mentioned above appear as classical ... fields and scalar matter fields. D-Branes and Black Holes 11 2.2 11-Dimensional and 10-Dimensional Supergravities Before the advent of strings as a theory of quantum gravity, there...
Ngày tải lên: 18/04/2014, 15:30
Intelligent Software Agents on the Internet: an inventory of currently offered functionality in the information society & a prediction of (near-)future developments
... matter; 17 LAN stands for Local Area Network (as opposed to a WAN: a Wide Area Network). A LAN is a group of computers and other devices dispersed over a relatively limited area and connected by a ... lead to an impractically large matchmaker. Therefore, a matchmaker as such does not strictly contain any domain knowledge. However, a matchmaker is free to use other me...
Ngày tải lên: 08/10/2012, 15:22
The Schwarzschild Solution and Black Holes
... imagine that you are arbitrarily strong (and accurate), you can arrange your throw such that E (2) < 0, as per (7.158). Furthermore, Penrose was able to show that you can arrange the initial ... side. The singularity at r = 0 is a timelike line, as in the other cases. So 7 THE SCHWARZSCHILD SOLUTION AND BLACK HOLES 207 for this black hole you can again avoid the singularity and con...
Ngày tải lên: 23/10/2013, 20:20
An introduction to black holes information and the string theory
... of a uni- tary S-matrix. 2) The usual semiclassical description of quantum fields in a slowly varying gravitational background is a good approximation to certain coarse grained features of the black ... horizon are not so severe in classical physics as they are in quantum theory. Accord- ing to classical physics the infalling observer can use an arbitrarily large carrier frequency...
Ngày tải lên: 19/01/2014, 13:57
Black holes
... that detects X-rays, a kind of radiation that can reveal a black hole’s location. Gravity and Early Predictions of Black Holes 12 Chapter 1 J ust about everyone has heard of black holes. But many ... melt and vaporize the matter immediately ahead. It will then pass through the hot vapor, absorbing it as it goes and adding to the heat, emerging at last as a considerably larger...
Ngày tải lên: 19/01/2014, 13:58
Black holes wormholes and time machines - jim al khalili
... But a theory is not the same as a law. The law of gravity says that all objects in the Universe are attracted to each other by a force that depends on how massive they are and how far apart they ... A splash of paint on a canvas also has a shape, but this is no longer that of a line but an area. Solid objects have shapes too. Cubes, spheres, people, cars all have geometric shape...
Ngày tải lên: 17/03/2014, 14:01
physics - black holes in supergravity and string theory
... φ m . Geometrically the scalars describe transverse oscillations of the brane. As a generalization one can consider N parallel Dp-branes. Each brane carries a U(1) gauge theory on its worldvolume, and as ... supertransformation takes the form δ Q = m A Q A m , when using Majorana spinors. The transformation para maters m A are N anticommuting Majorana spinors. Depending on whe...
Ngày tải lên: 18/04/2014, 15:27
persaud-liquidity black holes
... Liquidity Black Holes Avinash Persaud The Gresham and Mercer Memorial Professor of Commerce Managing Director & Head of Research State Street Global Markets April 2002 What is liquidity and why ... year smoothed average Number of days Liquidity black holes: num ber of days per quarter that the US, Japanese and UK broad stock indices have moved by 2 standard deviations m ore than...
Ngày tải lên: 23/04/2014, 21:41