Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Transiently changing shape of the photon number distribution in a quantum-dot--cavity system driven by chirped laser pulses

Title data

Cosacchi, Michael ; Seidelmann, Tim ; Ungar, Florian ; Cygorek, Moritz ; Vagov, Alexei ; Axt, Vollrath Martin:
Transiently changing shape of the photon number distribution in a quantum-dot--cavity system driven by chirped laser pulses.
In: Physical Review B. Vol. 101 (2020) . - Art.Nr. 205304.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.101.205304

Project information

Project financing: Alexander von Humboldt-Stiftung
Deutsche Forschungsgemeinschaft
Support from the Russian Science Foundation under Project No. 18-12-00429

Abstract in another language

We have simulated the time evolution of the photon number distribution in a semiconductor quantum-dot–microcavity system driven by chirped laser pulses and compare with unchirped results. When phonon interactions with the dot are disregarded—thus corresponding to the limit of atomic cavity systems—chirped pulses generate photon number distributions that change their shape drastically in the course of time. Phonons have a strong and qualitative impact on the photon statistics. The asymmetry between phonon absorption and emission destroys the symmetry of the photon distributions obtained for positive and negative chirps. While for negative chirps transient distributions resembling thermal ones are observed, for positive chirps the photon number distribution still resembles its phonon-free counterpart but with overall smoother shapes. In sharp contrast, using unchirped pulses of the same pulse area and duration wave packets are found that move up and down the Jaynes-Cummings ladder with a bell shape that changes little in time. For shorter pulses and lower driving strength Rabi-like oscillations occur between low photon number states. For all considered excitation conditions transitions between sub- and super-Poissonian statistics are found at certain times. For resonant driving with low intensity the Mandel parameter oscillates and is mostly negative, which indicates a nonclassical state in the cavity field. Finally, we show that it is possible that the Mandel parameter dynamically approaches zero and still the photon distribution exhibits two maxima and thus is far from being a Poissonian.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; photon number distribution; photon statistics; chirped laser pulses; path-integrals; microcavity; nonlinear optics; ultrafast dynamics; pure dephasing; phonons; decoherence; excitons; biexcitons; non-Markovian dynamics; memory effects; phonon-induced memory; multi-phonon processes; quantum dissipative dynamics; numerically exact; Lindblad operators; non-Hamiltonian dynamics
Subject classification: condensed matter physics (theoretical)
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
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 15 May 2020 07:24
Last Modified: 15 May 2020 07:24
URI: https://eref.uni-bayreuth.de/id/eprint/55166