Nonlocality Enhanced Precision in Quantum Polarimetry via Entangled Photons

Author:

Pedram Ali1ORCID,Besaga Vira R.2ORCID,Setzpfandt Frank23ORCID,Müstecaplıoğlu Özgür E.145ORCID

Affiliation:

1. Department of Physics Koç University, Istanbul Sarıyer 34450 Türkiye

2. Institute of Applied Physics Abbe Center of Photonics Friedrich‐Schiller‐Universität Jena 07745 Jena Germany

3. Fraunhofer Institute for Applied Optics and Precision Engineering IOF 07745 Jena Germany

4. TÜBİTAK Research Institute for Fundamental Sciences Gebze 41470 Türkiye

5. Faculty of Engineering and Natural Sciences Sabancı University Tuzla 34956 Türkiye

Abstract

AbstractA 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 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.

Publisher

Wiley

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