[Seminar] Nonlocal Quantum Polarimetry via Entangled Photons

Mr. Ali Pedram from Koç University in Turkey

Abstract:

A nonlocal quantum approach is presented to polarimetry, leveraging the phenomenon of entanglement in photon pairs to enhance the precision in sample property determination. By employing two distinct channels, one containing the sample of interest and the other serving as a reference, the conditions are explored under which the inherent correlation between entangled photons can increase measurement sensitivity. Specifically, the quantum Fisher information (QFI) is calculated and we compare the accuracy and sensitivity for the cases of single sample channel versus two channel quantum state tomography measurements. The theoretical results are verified by experimental analysis. The theoretical and experimental framework demonstrates that the nonlocal strategy enables enhanced precision and accuracy in extracting information about sample characteristics more than the local measurements. Depending on the chosen estimators and noise channels present, theoretical and experimental results show that noise-induced bias decreases the precision for the estimated parameter. Such a quantum-enhanced nonlocal polarimetry holds promise for advancing diverse fields including material science, biomedical imaging, and remote sensing, via high-precision measurements through quantum entanglement.

Biography:

Ali Pedram studied mechanical engineering at the University of Tabriz in Iran. He received a B.Sc. degree from University of Tabriz in 2013. He continued his studies in Sahand University of Technology, where he received a M.Sc. degree in mechanical engineering in 2016. His M.Sc. thesis is titled "Optimal control and distribution of motor torques for stabilizing electric vehicles in different maneuvers". In 2019 he started his doctoral studies in physics at Koç University in Istanbul, Turkey under supervision of Prof. Özgür Müstecaplıoğlu. He defended his thesis titled "Applications of quantum metrology and quantum thermodynamics in emerging quantum technologies" in June 2024.