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quant-ph2026
Optimal learning of covariant quantum states and channels
Satoshi Yoshida, Kazuki Okigami, Pietro M. Posta +1
We give collective tomography protocols for quantum states and channels with known symmetries, using random purification and dilation to reduce learning to pure-state estimation. F…
cond-mat.str-el2026
Multiple- spin textures induced by spiral--staggered interference in one-dimensional itinerant magnets
Satoru Hayami, Kazuki Okigami
We theoretically investigate multiple- magnetic states emerging from the interference between finite- spiral and staggered spin modulations in a one-dimensional itinerant ele…