Background independence in classical and quantum gravity

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It is often claimed that any quantum theory of gravity needs its defining equations to be independent of a particular spacetime geometry. James Read illuminates our understanding of background independence by mapping its possible definitions and assessing how various classical and quantum theories of gravity fare on these criteria.



It is often claimed that Einstein's magnum opus---his 1915 theory of General Relativity---is distinguished from other theories of space and time in virtue of its background independence. It's also often claimed that background independence is an essential feature of any quantum theory of gravity. But are these claims true? This book aspires to offer definitive answers to both of these questions, by (a) charting the space of possible definitions of background independence, and (b) applying said definitions to various classical and quantum theories of gravity. The outcome, in brief, is as follows: General Relativity is not unique by virtue of its background independence (and, indeed, fails to be background independent on some popular definitions); moreover, the situation in the case of quantum theories of gravity is delicate, because (i) there are viable such theories which (by some accounts, at least) fail to be background independent, but also (ii) theories (e.g. perturbative string theory) which have often been dismissed for (allegedly) being background dependent in fact, on many accounts, are better classified as background independent. In giving these answers in rigorous detail, this book seeks to elevate the standards and generality of future discussions of background independence in the foundations of spacetime theories.

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Constructing Quantum Mechanics

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This two volume book is on the genesis of quantum mechanics the first volume covers the key developments in the period 1900 1923 which provided the scaffold on which the arch of modern quantum mechanics was built this volume traces the early contributions by planck einstein and bohr to the theo Op voorraad. Voor 23:59 uur besteld, dinsdag in huis .. MEER INFO