Density operators and quantum tomography for optimizing a Bell parameter measurement in the graduate laboratory
We discuss how quantum state tomography of entangled photon pairs can be used in the lab as a natural follow-up to popular Bell inequalities experiments for graduate students and to introduce them to more advanced quantum concepts. In addition, we discuss how the measured density matrix can be used to quantitatively estimate the quantum state quality and optimize the Bell measurement to reach its maximum expected value for an arbitrary two-photon entangled state.
Authors
- Marina Kleine (ORCID: https://orcid.org/0000-0002-3690-658X)
- Renaud Mathevet (ORCID: https://orcid.org/0000-0003-2272-5718)
- Nicolas Ombredane
- Sébastien Massenot (ORCID: https://orcid.org/0000-0003-2127-0280)
- Bénoît Chalopin (ORCID: https://orcid.org/0000-0002-2780-5365)
- Alban Leschallier de Lisle
Institutions
- Centre National de la Recherche Scientifique (FR)
- Université Fédérale de Toulouse Midi-Pyrénées (FR)
- National Higher French Institute of Aeronautics and Space (FR)
Publication Details
- Journal
- American Journal of Physics
- Published
- 2025-12-23
- DOI
- https://doi.org/10.1119/5.0280007
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 0.00