3 papers
quant-ph2026
Adaptive Negativity Estimation via Collective Measurements
Martin Zeman, VojtÄch TrávnÃÄek, AntonÃn Äernoch +2
This paper explores an efficient method for entanglement quantification in two-qubit and qubit-qutrit quantum systems based upon the framework of collective measurements in conjunc…
quant-ph2025
Quantum Correlations in Three-Beam Symmetric Gaussian States Accessed via Photon-Number-Resolving Detection and Quantum Universal Invariants
Jan PeÅina, Nazarii Sudak, Artur BarasiÅski +1
Quantum correlations of 3-beam symmetric Gaussian states are analyzed using their quantum universal invariants. These invariants, 1-, 2-, and 3-beam purities, are expressed in term…
quant-ph2025
Efficient Characterization of N-Beam Gaussian Fields Through Photon-Number Measurements: Quantum Universal Invariants
Nazarii Sudak, Artur BarasiÅski, Jan PeÅina +1
Quantum universal invariants of general N-beam Gaussian fields are investigated from the point of view of fields' intensity moments. A method that uniquely links these invariants,…