Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Dephasing in quantum dots: quadratic coupling to acoustic phonons

Muljarov, Egor A. ORCID: and Zimmermann, R. 2004. Dephasing in quantum dots: quadratic coupling to acoustic phonons. Physical Review Letters 93 , 237401. 10.1103/PhysRevLett.93.237401

[thumbnail of Dephasing_in_Quantum_Dots.pdf]
Download (154kB) | Preview


A microscopic theory of optical transitions in quantum dots with a carrier-phonon interaction is developed. Virtual transitions into higher confined states with acoustic phonon assistance add a quadratic phonon coupling to the standard linear one, thus extending the independent boson model. Summing infinitely many diagrams in the cumulant, a numerically exact solution for the interband polarization is found. Its full time dependence and the absorption line shape of the quantum dot are calculated. It is the quadratic interaction which gives rise to a temperature-dependent broadening of the zero-phonon line, calculated here for the first time in a consistent scheme.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 0031-9007
Last Modified: 07 May 2023 21:32

Citation Data

Cited 200 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics