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Generation of squeezed phonon states by optical excitation of a quantum dot

Title data

Reiter, Doris ; Sauer, S. ; Huneke, Jan ; Papenkort, Thomas ; Kuhn, Tilmann ; Vagov, Alexei ; Axt, Vollrath M.:
Generation of squeezed phonon states by optical excitation of a quantum dot.
In: Journal of Physics: Conference Series. Vol. 193 (2009) Issue 1 . - Art.Nr. 012121, 4 S..
ISSN 1742-6596
DOI: https://doi.org/10.1088/1742-6596/193/1/012121

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

A theoretical analysis of the fluctuation properties of optical phonons generated by the optical excitation of a quantum dot is presented. In particular we study whether squeezed states may be generated where either the fluctuations of the displacement or of the momentum fall below the vacuum level. The calculations are based on a generating functions formalism which provides analytical results for the case of excitation by ultrashort optical pulses. While after a single pulse excitation no squeezing occurs we find that after an excitation with two phase-locked pulses phonon states can be created where the uncertainties of displacement or momentum temporarily fall below their vacuum values.

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 10:37
Last Modified: 30 Oct 2017 10:37
URI: https://eref.uni-bayreuth.de/id/eprint/40202