Towards A Nonviolent Alternative For The Black Hole Information Paradox
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Towards A Nonviolent Alternative For The Black Hole Information Paradox
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Author : Yinbo Shi
language : en
Publisher:
Release Date : 2015
Towards A Nonviolent Alternative For The Black Hole Information Paradox written by Yinbo Shi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
In the semiclassical approximation, quantum field theory suggests that black holes eventually evaporate in a manner largely independent of their internal structure. Doing so, however, leads to a violation of unitarity of quantum mechanics, rendering the system inconsistent. One possible resolution is soft violations of locality in the near horizon region. The first consistency check is whether such a proposal can actually get the information out. Using quantum information techniques, a large class of evolutions into paired states is ruled out. More generally, information transfer can be characterized by the mutual information of a specially prepared state. Minimizing this quantity saturates a subadditivity inequality, leading to "subspace transfer"; maximizing it generically leads to an enhanced particle flux. Using the tools of effective field theory, one can then try to model the nonlocality as arising from an effective source localized near the horizon. To get information out at the right rate, this source must have a characteristic size. The horizon is altered, but nonviolent. This model also naturally accommodates black hole mining, avoiding a potential flaw. Having passed important consistency checks, nonviolent nonlocality is a viable solution to the information paradox.
Quantum Black Holes
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Author : Xavier Calmet
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-22
Quantum Black Holes written by Xavier Calmet and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-22 with Science categories.
Written by foremost experts, this short book gives a clear description of the physics of quantum black holes. The reader will learn about quantum black holes in four and higher dimensions, primordial black holes, the production of black holes in high energy particle collisions, Hawking radiation, black holes in models of low scale quantum gravity and quantum gravitational aspects of black holes.
How Nonviolence Protects The State
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Author : Peter Gelderloos
language : en
Publisher:
Release Date : 2018-07
How Nonviolence Protects The State written by Peter Gelderloos and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07 with Philosophy categories.
"Since the civil rights era, the doctrine of nonviolence has enjoyed near-universal acceptance by the US Left. Today protest is often shaped by cooperation with state authorities--even organizers of rallies against police brutality apply for police permits, and anti-imperialists usually stop short of supporting self-defense and armed resistance. How Nonviolence Protects the State challenges the belief that nonviolence is the only way to fight for a better world. In a call bound to stir controversy and lively debate, Peter Gelderloos invites activists to consider diverse tactics, passionately arguing that exclusive nonviolence often acts to reinforce the same structures of oppression that activists seek to overthrow."--Back cover.
Quantum Field Theory In Curved Spacetime And Black Hole Thermodynamics
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Author : Robert M. Wald
language : en
Publisher: University of Chicago Press
Release Date : 1994-11-15
Quantum Field Theory In Curved Spacetime And Black Hole Thermodynamics written by Robert M. Wald and has been published by University of Chicago Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994-11-15 with Science categories.
In this book, Robert Wald provides a coherent, pedagogical introduction to the formulation of quantum field theory in curved spacetime. He begins with a treatment of the ordinary one-dimensional quantum harmonic oscillator, progresses through the construction of quantum field theory in flat spacetime to possible constructions of quantum field theory in curved spacetime, and, ultimately, to an algebraic formulation of the theory. In his presentation, Wald disentangles essential features of the theory from inessential ones (such as a particle interpretation) and clarifies relationships between various approaches to the formulation of the theory. He also provides a comprehensive, up-to-date account of the Unruh effect, the Hawking effect, and some of its ramifications. In particular, the subject of black hole thermodynamics, which remains an active area of research, is treated in depth. This book will be accessible to students and researchers who have had introductory courses in general relativity and quantum field theory, and will be of interest to scientists in general relativity and related fields.
Questioning Empowerment
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Author : Jo Rowlands
language : en
Publisher: Oxfam
Release Date : 1997-01-01
Questioning Empowerment written by Jo Rowlands and has been published by Oxfam this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-01-01 with Social Science categories.
Focusing on the term empowerment this book examines the various meanings given to the concept of empowerment and the many ways power can be expressed - in personal relationships and in wider social interactions.
Holographic Entanglement Entropy
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Author : Mukund Rangamani
language : en
Publisher: Springer
Release Date : 2017-05-08
Holographic Entanglement Entropy written by Mukund Rangamani and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-05-08 with Science categories.
This book provides a comprehensive overview of developments in the field of holographic entanglement entropy. Within the context of the AdS/CFT correspondence, it is shown how quantum entanglement is computed by the area of certain extremal surfaces. The general lessons one can learn from this connection are drawn out for quantum field theories, many-body physics, and quantum gravity. An overview of the necessary background material is provided together with a flavor of the exciting open questions that are currently being discussed. The book is divided into four main parts. In the first part, the concept of entanglement, and methods for computing it, in quantum field theories is reviewed. In the second part, an overview of the AdS/CFT correspondence is given and the holographic entanglement entropy prescription is explained. In the third part, the time-dependence of entanglement entropy in out-of-equilibrium systems, and applications to many body physics are explored using holographic methods. The last part focuses on the connection between entanglement and geometry. Known constraints on the holographic map, as well as, elaboration of entanglement being a fundamental building block of geometry are explained. The book is a useful resource for researchers and graduate students interested in string theory and holography, condensed matter and quantum information, as it tries to connect these different subjects linked by the common theme of quantum entanglement.
Toward A Theory Of Spacepower Selected Essays
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Author :
language : en
Publisher: Smashbooks
Release Date : 2011
Toward A Theory Of Spacepower Selected Essays written by and has been published by Smashbooks this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Gauge Gravity Duality
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Author : Martin Ammon
language : en
Publisher: Cambridge University Press
Release Date : 2015-04-09
Gauge Gravity Duality written by Martin Ammon and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-04-09 with Juvenile Nonfiction categories.
The first textbook on this important topic, for graduate students and researchers in particle and condensed matter physics.
The Wretched Of The Earth
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Author : Frantz Fanon
language : en
Publisher: Grove/Atlantic, Inc.
Release Date : 2007-12-01
The Wretched Of The Earth written by Frantz Fanon and has been published by Grove/Atlantic, Inc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-12-01 with Social Science categories.
The sixtieth anniversary edition of Frantz Fanon’s landmark text, now with a new introduction by Cornel West First published in 1961, and reissued in this sixtieth anniversary edition with a powerful new introduction by Cornel West, Frantz Fanon’s The Wretched of the Earth is a masterfuland timeless interrogation of race, colonialism, psychological trauma, and revolutionary struggle, and a continuing influence on movements from Black Lives Matter to decolonization. A landmark text for revolutionaries and activists, The Wretched of the Earth is an eternal touchstone for civil rights, anti-colonialism, psychiatric studies, and Black consciousness movements around the world. Alongside Cornel West’s introduction, the book features critical essays by Jean-Paul Sartre and Homi K. Bhabha. This sixtieth anniversary edition of Fanon’s most famous text stands proudly alongside such pillars of anti-colonialism and anti-racism as Edward Said’s Orientalism and The Autobiography of Malcolm X.
Topology And Physics
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Author : Chen Ning Yang
language : en
Publisher: World Scientific
Release Date : 2019-01-09
Topology And Physics written by Chen Ning Yang and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-01-09 with Science categories.
'The book is an engaging and influential collection of significant contributions from an assembly of world expert leaders and pioneers from different fields, working at the interface between topology and physics or applications of topology to physical systems … The book explores many interesting and novel topics that lie at the intersection between gravity, quantum fields, condensed matter, physical cosmology and topology … A rich, well-organized, and comprehensive overview of remarkable and insightful connections between physics and topology is here made available to the physics reader.'Contemporary PhysicsSince its birth in Poincaré's seminal 1894 'Analysis Situs', topology has become a cornerstone of mathematics. As with all beautiful mathematical concepts, topology inevitably — resonating with that Wignerian principle of the effectiveness of mathematics in the natural sciences — finds its prominent role in physics. From Chern-Simons theory to topological quantum field theory, from knot invariants to Calabi-Yau compactification in string theory, from spacetime topology in cosmology to the recent Nobel Prize winning work on topological insulators, the interactions between topology and physics have been a triumph over the past few decades.In this eponymous volume, we are honoured to have contributions from an assembly of grand masters of the field, guiding us with their world-renowned expertise on the subject of the interplay between 'Topology' and 'Physics'. Beginning with a preface by Chen Ning Yang on his recollections of the early days, we proceed to a novel view of nuclei from the perspective of complex geometry by Sir Michael Atiyah and Nick Manton, followed by an entrée toward recent developments in two-dimensional gravity and intersection theory on the moduli space of Riemann surfaces by Robbert Dijkgraaf and Edward Witten; a study of Majorana fermions and relations to the Braid group by Louis H Kauffman; a pioneering investigation on arithmetic gauge theory by Minhyong Kim; an anecdote-enriched review of singularity theorems in black-hole physics by Sir Roger Penrose; an adventure beyond anyons by Zhenghan Wang; an aperçu on topological insulators from first-principle calculations by Haijun Zhang and Shou-Cheng Zhang; finishing with synopsis on quantum information theory as one of the four revolutions in physics and the second quantum revolution by Xiao-Gang Wen. We hope that this book will serve to inspire the research community.