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Polaritons: Excitonic States Taking Account of Retardation

Vladimir M. Agranovich

in Excitations in Organic Solids

Published in print:
2008
Published Online:
January 2009
ISBN:
9780199234417
eISBN:
9780191715426
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199234417.003.0004
Subject:
Physics, Atomic, Laser, and Optical Physics

This chapter presents the microscopical theory of polaritons, being coherent superposition of one exciton and one transverse photon state. The dispersion of polaritons including the effect of spatial ... More


THERMALLY ACTIVATED MAGNETIC RELAXATION

Dante Gatteschi, Roberta Sessoli, and Jacques Villain

in Molecular Nanomagnets

Published in print:
2006
Published Online:
September 2007
ISBN:
9780198567530
eISBN:
9780191718298
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198567530.003.0005
Subject:
Physics, Condensed Matter Physics / Materials

This chapter works out the thermally activated magnetic relaxation, which is responsible for the high temperature behaviour of the SMM. The concept of magnetic relaxation is correctly formalized and ... More


The environment is watching

Serge Haroche and Jean-Michel Raimond

in Exploring the Quantum: Atoms, Cavities, and Photons

Published in print:
2006
Published Online:
January 2010
ISBN:
9780198509141
eISBN:
9780191708626
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198509141.003.0004
Subject:
Physics, Atomic, Laser, and Optical Physics

This chapter presents the general relaxation theory which describes the dynamical evolution of an open system A coupled to a large environment E. Section 4.1 reviews the main properties of the ... More


Wormholes, Time Travel, and Other Exotic Theories

John W. Moffat

in The Shadow of the Black Hole

Published in print:
2020
Published Online:
June 2020
ISBN:
9780190650728
eISBN:
9780197517383
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780190650728.003.0005
Subject:
Physics, Particle Physics / Astrophysics / Cosmology

In 1935, Einstein and Rosen described what is now called the Einstein-Rosen bridge. Wheeler called this a wormhole, which could connect two distant parts of the universe. Thorne and Morris showed the ... More


Absorption and Emission of Light in Quantum Structures

Vurgaftman Igor

in Bands and Photons in III-V Semiconductor Quantum Structures

Published in print:
2020
Published Online:
January 2021
ISBN:
9780198767275
eISBN:
9780191821431
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198767275.003.0011
Subject:
Physics, Particle Physics / Astrophysics / Cosmology

This chapter shows how to calculate the absorption coefficient, optical gain, and radiative recombination rates in quantum wells and superlattices. A detailed treatment of both interband and ... More


The physics of black holes I

Nathalie Deruelle and Jean-Philippe Uzan

in Relativity in Modern Physics

Published in print:
2018
Published Online:
October 2018
ISBN:
9780198786399
eISBN:
9780191828669
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198786399.003.0049
Subject:
Physics, Particle Physics / Astrophysics / Cosmology

This chapter describes two physical processes related to the Schwarzschild and Kerr solutions which can be induced by the gravitational field of a black hole. The first is the Penrose process, which ... More


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