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Lattice Fluctuations at a Double Phonon Frequency with and without Squeezing : An Exactly Solvable Model of an Optically Excited Quantum Dot

Title data

Sauer, S. ; Daniels, J. M. ; Reiter, Doris ; Kuhn, Tilmann ; Vagov, Alexei ; Axt, Vollrath M.:
Lattice Fluctuations at a Double Phonon Frequency with and without Squeezing : An Exactly Solvable Model of an Optically Excited Quantum Dot.
In: Physical Review Letters. Vol. 105 (2010) Issue 15 . - Art.Nr. 157401, 4 S..
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.105.157401

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Time-dependent lattice fluctuations of an optically excited strongly confined quantum dot are investigated with the aim to analyze the characteristics commonly used for identifying the presence of squeezed phonon states. It is demonstrated that the appearance of fluctuations oscillating with twice the phonon frequency, commonly regarded as a clear indication of squeezed states, cannot be considered as such. The source of the discrepancy with earlier investigations is discussed. Conditions for generating a squeezed state by using a two-pulse excitation are analyzed.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dots; generating functions; exact results; ultrafast dynamics; phonon squeezing; optical excitation; phonon dynamics
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: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 30 Oct 2017 13:26
Last Modified: 30 Oct 2017 13:26
URI: https://eref.uni-bayreuth.de/id/eprint/40221