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Nonlinear cavity feeding and unconventional photon statistics in solid-state cavity QED revealed by many-level real-time path-integral calculations

Title data

Cygorek, Moritz ; Barth, Andreas M. ; Ungar, Florian ; Vagov, Alexei ; Axt, Vollrath M.:
Nonlinear cavity feeding and unconventional photon statistics in solid-state cavity QED revealed by many-level real-time path-integral calculations.
In: Physical Review B. Vol. 96 (2017) Issue 20 . - Art.Nr. 201201(R), 5 S. + 5 S. Suppl..
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.96.201201

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Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The generation of photons in a microcavity coupled to a laser-driven quantum dot interacting with longitudinal acoustic (LA) phonons is studied in the regime of simultaneously strong driving and strong dot-cavity coupling. The stationary cavity photon number is found to depend in a nontrivial way on the detuning between the laser and the exciton transition in the dot. In particular, the maximal efficiency of the cavity feeding is obtained for detunings corresponding to transition energies between cavity-dressed states with excitation numbers larger than one. Phonons significantly enhance the cavity feeding at large detunings. In the strong-driving, strong-coupling limit, the photon statistics is highly non-Poissonian. While without phonons a double-peaked structure in the photon distribution is predicted, phonons make the photon statistics thermal-like with very high effective temperatures ∼10^5 K, even for low phonon temperatures ∼4 K. These results were obtained by numerical calculations where the driving, the dot-cavity coupling, and the dot-phonon interactions are taken into account without approximations. This is achieved by a reformulation of an exact iterative path-integral scheme which is applicable to a large class of quantum-dissipative systems and which in our case reduces the numerical demands by 15 orders of magnitude.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: quantum dot; path-integrals; nonlinear optics; ultrafast dynamics; pure dephasing; phonons; decoherence; excitons; cavity; non-Markovian dynamics; memory effects; phonon-induced memory; multi-phonon processes; quantum dissipative dynamics; numerically exact; Lindblad operators; non-Hamiltonian dynamics; strong light-matter coupling; cavity QED; Jaynes-Cummings model; photon statistics
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
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 13:38
Last Modified: 05 Mar 2019 07:10
URI: https://eref.uni-bayreuth.de/id/eprint/40685