3 papers
quant-ph2026
Asymptotically optimal joint phase and dephasing strength estimation using spin-squeezed states
Arkadiusz Kobus, RafaÅ Demkowicz-DobrzaÅski, Rafał Demkowicz-Dobrzański
We show an explicit -qubit protocol involving one-axis-twisted spin squeezed states, that allows for simultaneous phase and dephasing strength estimation with precision that asy…
quant-ph2025
Optimal phase estimation in the presence of correlated dephasing
Srijon Ghosh, Arkadiusz Kobus, StanisÅaw KurdziaÅek +1
We investigate optimal metrological protocols for phase estimation in the presence of correlated dephasing noise, including spin-squeezed states sensing strategies as well as paral…
cond-mat.quant-gas2025
Multisetting protocol for Bell correlated states detection with spin- systems
Arkadiusz Kobus, Xinwei Li, Mariusz Gajda +2
We propose a multisetting protocol for the detection of two-body Bell correlations, and apply it to spin-nematic squeezed states realized in pairs of SU(2) subsystems within sp…