at Google ScholarTitle data
Papenkort, Thomas ; Axt, Vollrath Martin ; Kuhn, Tilmann:
Stationary Phonon Squeezing by Optical Polaron Excitation.
In: Physical Review Letters.
Vol. 118
(2017)
Issue 9
.
- No. 097401.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.118.097401
Abstract in another language
We demonstrate that a stationary squeezed phonon state can be prepared by a pulsed optical excitation of a semiconductor quantum well. Unlike previously discussed scenarios for generating squeezed phonons, the corresponding uncertainties become stationary after the excitation and do not oscillate in time. The effect is caused by two-phonon correlations within the excited polaron. We demonstrate by quantum kinetic simulations and by a perturbation analysis that the energetically lowest polaron state comprises two-phonon correlations which, after the pulse, result in an uncertainty of the lattice momentum that is continuously lower than in the ground state of the semiconductor. The simulations show the dynamics of the polaron formation process and the resulting time-dependent lattice uncertainties.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Keywords: | quantum wells; semiconductors; ultrafast dynamics; phonon squeezing; optical excitation; phonon dynamics; lattice fluctuations; quantum kinetics; stationary squeezing; polaron formation; two-phonon correlations |
| 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: | 27 Nov 2017 13:42 |
| Last Modified: | 09 Mar 2022 11:11 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/40686 |