78 citations · 239 across the 21 of their papers we have counts for
Showing 2026Show all
3 papers · 1 filter
quant-ph2026
Characterizing quantum channels from local-unitary invariants
Salwa Shaglel, Satoya Imai
We develop systematic frameworks for characterizing the entanglement properties of two-qubit channels beyond unitary settings. We introduce averaged local-unitary invariants, refer…
quant-ph2026
Hierarchy of saturation conditions for multiparameter quantum metrology bounds
Satoya Imai, Jing Yang, Luca Pezzè
The quantum Cramér-Rao (QCR) bound sets the ultimate local precision limit for unbiased multiparameter estimation. Unlike in the single-parameter case, however, its saturability is…
quant-ph2026
A geometric criterion for optimal measurements in multiparameter quantum metrology
Jing Yang, Satoya Imai, Luca Pezzè
Determining when the multiparameter quantum Cramér--Rao bound (QCRB) is saturable with experimentally relevant single-copy measurements is a central open problem in quantum metrolo…