## Title data

Victor, K. ; Axt, Vollrath M. ; Stahl, Arne:

**Hierarchy of density matrices in coherent semiconductor optics.**

*In:* Physical Review B.
Vol. 51
(1995)
Issue 20
.
- pp. 14164-14175.

ISSN 0163-1829

DOI: https://doi.org/10.1103/PhysRevB.51.14164

## Abstract in another language

The hierarchy of many-body density matrices describing the nonlinear optical response of semiconductors is studied. The analysis is restricted to the coherent electronic dynamics generated by the relevant Hamiltonian. The strength of the optical excitation is used as a perturbation parameter, allowing a controlled truncation of the hierarchy and a drastic reduction of the number of independent multipoint functions describing the response to any given order. Thus the many-body effects contributing to the nth order susceptibility χ(n) are described by n+1/2 independent multipoint functions. As a consequence of the assumed coherence it turns out that all densitylike variables can be expressed in terms of transitionlike quantities. The proposed systematic treatment of Coulomb correlations is compared with the conventional random-phase approximation factorization of many-body matrices.

## Further data

Item Type: | Article in a journal |
---|---|

Refereed: | Yes |

Keywords: | dynamics controlled truncation; non-linear optics; ultrafast dynamics; density matrix theory; semiconductors |

Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III |

Result of work at the UBT: | No |

DDC Subjects: | 500 Science > 530 Physics |

Date Deposited: | 16 Oct 2017 08:59 |

Last Modified: | 16 Oct 2017 08:59 |

URI: | https://eref.uni-bayreuth.de/id/eprint/40009 |