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Transitions

Ian R. Kenyon

in Quantum 20/20: Fundamentals, Entanglement, Gauge Fields, Condensates and Topology

Published in print:
2019
Published Online:
November 2019
ISBN:
9780198808350
eISBN:
9780191846052
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198808350.003.0007
Subject:
Physics, Theoretical, Computational, and Statistical Physics, Particle Physics / Astrophysics / Cosmology

A derivation of Fermi’s golden rule is given: this is the interface into which matrix elements from theory can be slotted to provide a prediction testable by experiment. The example of the prediction ... More


Dissipative Processes

STEPHEN M. BARNETT and PAUL M. RADMORE

in Methods in Theoretical Quantum Optics

Published in print:
2002
Published Online:
February 2010
ISBN:
9780198563617
eISBN:
9780191714245
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198563617.003.0005
Subject:
Physics, Theoretical, Computational, and Statistical Physics

This chapter treats dissipation arising from coupling to the environment. Problems treated include photoionization, spontaneous emission, and cavity damping. A short-time perturbative analysis leads ... More


Quantum transport

B. K. Ridley FRS

in Quantum Processes in Semiconductors

Published in print:
2013
Published Online:
December 2013
ISBN:
9780199677214
eISBN:
9780191760624
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199677214.003.0011
Subject:
Physics, Condensed Matter Physics / Materials

In certain cases, the electron involved in the scattering process may begin in a well-defined initial state and end up in an equally well-defined final state. Scattering is assumed to conserve energy ... More


Quantum mechanical interaction of light with atoms

Peter Blood

in Quantum Confined Laser Devices: Optical gain and recombination in semiconductors

Published in print:
2015
Published Online:
November 2015
ISBN:
9780199644513
eISBN:
9780191810329
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199644513.003.0007
Subject:
Physics, Atomic, Laser, and Optical Physics

The quantum mechanical description of the interaction of light with atoms treats absorption, gain, and recombination as upward and downward induced transitions of electrons between two states by ... More


Intermolecular Dynamics and Bimolecular Reactions

Elliot R. Bernstein

in Chemical Reactions in Clusters

Published in print:
1996
Published Online:
November 2020
ISBN:
9780195090048
eISBN:
9780197560594
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780195090048.003.0008
Subject:
Chemistry, Physical Chemistry

The study of clusters has taken the path that is quite typical in physical chemistry research for a newly discovered system or state of matter: (1) elucidation of energy eigenstates, both ... More


Approximation Techniques for Stationary and Dynamic Problems

Duncan G. Steel

in Introduction to Quantum Nanotechnology: A Problem Focused Approach

Published in print:
2021
Published Online:
July 2021
ISBN:
9780192895073
eISBN:
9780191924149
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780192895073.003.0011
Subject:
Physics, Theoretical, Computational, and Statistical Physics, Condensed Matter Physics / Materials

For many aspects of device design, an exact solution to Schrödinger’s equation is not needed. However, it may simultaneously be required that all of the physical features are clearly understood. The ... More


Optical transitions in quantum wells

Peter Blood

in Quantum Confined Laser Devices: Optical gain and recombination in semiconductors

Published in print:
2015
Published Online:
November 2015
ISBN:
9780199644513
eISBN:
9780191810329
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199644513.003.0011
Subject:
Physics, Atomic, Laser, and Optical Physics

Optical transitions in quantum wells occur between closely spaced states associated with unconfined motion in the plane of the well within sub-bands formed by confinement across the well. The energy ... More


Time-dependent Hamiltonian

Efstratios Manousakis

in Practical Quantum Mechanics: Modern Tools and Applications

Published in print:
2015
Published Online:
December 2015
ISBN:
9780198749349
eISBN:
9780191813474
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198749349.003.0022
Subject:
Physics, Atomic, Laser, and Optical Physics

This chapter discusses how to treat the case of a perturbation which depends on time. It also discusses the case of the so-called real-time evolution and the adiabatic process which has received more ... More


Quantum theory of electron-transfer reactions

Wolfgang Schmickler

in Interfacial Electrochemistry

Published in print:
1996
Published Online:
November 2020
ISBN:
9780195089325
eISBN:
9780197560563
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780195089325.003.0026
Subject:
Chemistry, Physical Chemistry

The theory of electron-transfer reactions presented in Chapter 6 was mainly based on classical statistical mechanics. While this treatment is reasonable for the reorganization of the outer sphere, ... More


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