3 papers
quant-ph2026
Bayesian approach to simultaneous quantum multiparameter estimation with finite data
Chun Kit Dennis Law, József Zsolt Bernád
Multiparameter estimation remains a fundamental challenge in quantum estimation theory because the optimal measurements associated with different parameters are generally incompati…
quant-ph2025
Bayesian and frequentist estimators for the transition frequency of a driven two-level quantum system
Chun Kit Dennis Law, József Zsolt Bernád
The formalism of quantum estimation theory with a specific focus on classical data postprocessing is applied to a two-level system driven by an external gyrating magnetic field. We…
quant-ph2025
Entanglement in bipartite X-states: Analytical results for the volume of states with positive partial transpose
Yaqing Xy Wang, József Zsolt Bernád
We provide an analytical formula for the volume ratio between bipartite X-states with positive partial transpose and all bipartite X-states. The result applies to arbitrary $m \tim…