LAMP-SEMINAR

Quantum states of light have emerged as a central resource for the development of quantum technologies. In particular, quantum correlations in photonic states enable new capabilities in quantum communication, imaging, and sensing. Harnessing these advantages requires reliable experimental tools for manipulating, detecting, and preserving quantum correlations under realistic conditions.

Spontaneous parametric down-conversion (SPDC) is a widely used platform for generating entangled photon pairs across multiple degrees of freedom, including spatial, temporal, and polarization. In this seminar, I will first present my research contributions on experimental methods for detecting and controlling spatial entanglement in SPDC photon pairs. I will focus on three main results: two-photon spatial entanglement detection via single-photon coherence measurements, propagation-induced entanglement revival in turbulent media, and controlled structuring of entangled photons. These results provide an efficient entanglement detection scheme, demonstrate robustness of spatial entanglement in realistic propagation environments, and enable controlled manipulation of entangled states. As a result, they strengthen the practical feasibility of entanglement-enabled applications.

I will then turn to my recent work in the time–frequency domain and present frequency-bin interferometry for reconstructing electric fields with low intensity (FIREFLY), a technique that enables direct and reference-free characterization of spectral-temporal states of ultrafast single-photon pulses. I will also discuss the extension of this approach for characterizing time-frequency entangled biphoton states. Finally, I will outline my future research program focused on spatial and temporal quantum correlations for imaging, sensing, and metrology.