Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Coherent two- and four-particle excitations

A. Arima

Published Jan 1, 1972• 0 citations
OpenAlex

Related papers

Two-state coherent excitation

Bruce W. Shore

Cambridge University Press eBooks•Sep 29, 2011•1 citation

Coherence of Four-Particle Correlations in Semiconductors

Peter Kner, Wilfried Schäfer, R. Lövenich +1 more

We report direct investigations of the coherence of four-particle (exciton-exciton) correlations by ultrafast four-wave mixing experiments. We determine the sensitivity of the coherence of the four-particle correlations to temperature and excitation density, comparing it to the coherence of the two-particle correlations. We discuss our results in terms of numerical solutions of the general kinetic equations, treating the four-particle correlations in the second order Born approximation. We introduce a simple model deduced from these kinetic equations that provides an intuitive interpretation of our results.

Physical Review Letters•Dec 14, 1998•113 citations

Coherent particles

Jan‐Erik Rubensson

Morgan & Claypool Publishers eBooks•Jul 1, 2016•0 citations

From Coherently Excited Highly Correlated States to Incoherent Relaxation Processes in Semiconductors

W. Schäfer, R. Lövenich, Neil A. Fromer +1 more

Recent theories of highly excited semiconductors are based on two formalisms, referring to complementary experimental conditions, the real-time nonequilibrium Green's function techniques and the coherently controlled truncation of the many-particle problem. We present a novel many-particle theory containing both of these methods as limiting cases. As a first example of its application, we investigate four-particle correlations in a strong magnetic field including dephasing resulting from the growth of incoherent one-particle distribution functions. Our results are the first rigorous solution concerning formation and decay of four-particle correlations in semiconductors. They are in excellent agreement with experimental data.

Physical Review Letters•Jan 8, 2001•30 citations

Formation and Decay of Coherent Four-Particle Correlations in Semiconductors: A Green's Function Theory

W. Sch�fer, R. L�venich, Neil A. Fromer +1 more

Recent conceptual advances in the theory of physics of highly excited semiconductors are based on two formalisms, the real-time non-equilibrium Green's function techniques and the coherently controlled truncation of the many-particle problems. These approaches apply to completely different but complementary experimental conditions. We present a novel many-particle theory, which contains both of these methods as limiting cases. As a first example of its application, we investigate four-particle correlations in a strong magnetic field including dephasing resulting from the growth of incoherent one-particle distribution functions. Our results are the first numerical rigorous solutions of the four-particle problem in a semiconductor. They are in excellent agreement with experimental data.

physica status solidi (b)•Sep 1, 2000•5 citations

Coherent excitation of n=4 states of H and He

Jingbo Wang, James Williams, A. T. Stelbovics +2 more

•Jan 1, 1993•0 citations
We report direct investigations of the coherence of four-particle (exciton-exciton) correlations by ultrafast four-wave mixing experiments. We determine the sensitivity of the coherence of the four-particle correlations to temperature and excitation density, comparing it to the coherence of the two-particle correlations. We discuss our results in terms of numerical solutions of the general kinetic equations, treating the four-particle correlations in the second order Born approximation. We introduce a simple model deduced from these kinetic equations that provides an intuitive interpretation of our results.
Recent theories of highly excited semiconductors are based on two formalisms, referring to complementary experimental conditions, the real-time nonequilibrium Green's function techniques and the coherently controlled truncation of the many-particle problem. We present a novel many-particle theory containing both of these methods as limiting cases. As a first example of its application, we investigate four-particle correlations in a strong magnetic field including dephasing resulting from the growth of incoherent one-particle distribution functions. Our results are the first rigorous solution concerning formation and decay of four-particle correlations in semiconductors. They are in excellent agreement with experimental data.
Recent conceptual advances in the theory of physics of highly excited semiconductors are based on two formalisms, the real-time non-equilibrium Green's function techniques and the coherently controlled truncation of the many-particle problems. These approaches apply to completely different but complementary experimental conditions. We present a novel many-particle theory, which contains both of these methods as limiting cases. As a first example of its application, we investigate four-particle correlations in a strong magnetic field including dephasing resulting from the growth of incoherent one-particle distribution functions. Our results are the first numerical rigorous solutions of the four-particle problem in a semiconductor. They are in excellent agreement with experimental data.