Temporal correlations, non-Gaussianityand imaging using quantum emitters

by Jaewon Lee (Stockholm University)

Wednesday 4 Feb 2026, 10:00 → 13:00 Europe/Stockholm

ALB Hörsal 6 (Casesal), Albanovägen 10 (Albano Building 4)

Abstract
This thesis addresses four key contributions. First, we investigated how tem-poral correlations and dephasing in a quantum
dot photon-pair source affecttwo-photon interference, analyzing these effects through multiple approaches,including the
sensor method, temporal post-selection, and temperature varia-tion under constant temporal correlations. Second, we
implemented a methodbased on low-quality factor micropillar cavities to enhance collection effi-ciency for photon pairs.
This approach is based on relatively simple fabrica-tion method and achieves high collection efficiency without solely
relying onstrong Purcell enhancement, in contrast to conventional concept. Third, wepresented non-Gaussianity criteria
that explicitly account for optical losses,enabling reliable characterization of photon states, and we experimentally verified
the presence of non-Gaussianity using a quantum dot photon-pair source.Finally, we introduced a deep-learning-based
super-resolution imaging tech-nique that accurately reconstructs images of quantum dots with high resolu-tion without
prior system knowledge, even in high-density and noisy environ-ments.Together, these results offer practical solutions for
advancing quantum dotphoton sources suitable for emerging quantum technologies.