Non-markovian resonance fluorescence

Abhishek Kumar

Abhishek Kumar, Sigurður I. Erlingsson, Bill Coish

K. Wódkiewicz, Joseph H. Eberly

Felipe Caycedo‐Soler, Ferney J. Rodríguez, Luis Quiroga +2 more

The dissipative dynamics of a confined single exciton coupled to a reservoir is investigated beyond the Born‐Markov approximation. Specifically, the resonance fluorescence main features are studied as the coupling strength is varied with respect to the driving laser intensity. To the lowest order, the effective Hamiltonian is treated stochastically, from which an analytical solution of the fluorescence spectrum shows the basic features of a non‐Markovian noise induced dynamics. Finally, we discuss some aspects of higher‐order effects in the non‐Markovian system‐bath dynamics.

Fritz Haake, Joseph W. Haus, Kazimierz Rza̧żewski

Sebastian Toivonen, Kimmo Luoma

We investigate a quantum dot (QD) system coupled to a vibrational environment with a super-Ohmic spectral density and weakly to a leaky cavity mode, a model relevant for semiconductor-based single-photon sources. The phonon coupling induces dephasing and broadens the absorption and emission line shapes, while the weakly coupled cavity mode leads to effective driving of the QD. To capture non-Markovian effects, we use non-Markovian Quantum State Diffusion and its hierarchical extension the Hierarchy of Pure States to compute multitime correlation functions underlying absorption and resonance fluorescence spectra. We present numerical results for the absorption spectra at strong phonon coupling and finite temperature, as well as for resonance fluorescence spectra at varying phonon coupling strengths and temperatures, and analyse the visibility of the resonance fluorescence spectra to provide insights into how phonon coupling and thermal effects influence the spectral features.