Reconstruction of exciton wave functions of coupled quantum emitters including spin with ultrafast spectroscopy using localized nanooptical fields

Enhanced TEMPO algorithm for quantum path integrals with off-diagonal system-bath coupling: applications to photonic quantum networks

“…Other (positive) contributions between the first and second rung are overlapping with resonances 1 and 2, which slightly affect their line shape. The negative peaks 3 and 4 can be a result that only the TLS polarization is included, missing the photon part of the polariton and probably a result caused by expansion coefficients of the polariton together with a local detection only on the TLS [53][54][55][56], or an excitation transfer process (see Ref. 39 for details).…”

“…The negative features are of course puzzling, but can be a result, that the system is in the local basis and thus expansion coefficients such as c 1 e or c 12 f etc, and their phase enter the signal. While our method does not allow to access the bath-the photon part-we can show, that if we detect only one quantum emitter [53][54][55][56], formally dark state can give negative contributions in the spectrum (cf. Fig.…”