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Hadamard States from Light-Like Hypersurfaces

Hadamard States from Light-Like Hypersurfaces

Paperback

Series: Springerbriefs in Mathematical Physics, Book 25

Astronomy & SpacePhysics

ISBN10: 3319643428
ISBN13: 9783319643427
Publisher: Springer Nature
Published: Oct 10 2017
Pages: 106
Weight: 0.38
Height: 0.24 Width: 6.14 Depth: 9.21
Language: English

This book provides a rather self-contained survey of the construction of Hadamard states for scalar field theories in a large class of notable spacetimes, possessing a (conformal) light-like boundary. The first two sections focus on explaining a few introductory aspects of this topic and on providing the relevant geometric background material. The notions of asymptotically flat spacetimes and of expanding universes with a cosmological horizon are analysed in detail, devoting special attention to the characterization of asymptotic symmetries. In the central part of the book, the quantization of a real scalar field theory on such class of backgrounds is discussed within the framework of algebraic quantum field theory. Subsequently it is explained how it is possible to encode the information of the observables of the theory in a second, ancillary counterpart, which is built directly on the conformal (null) boundary.

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