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Author

Yoshihiko Hasegawa

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Preprint Sep 2026

Anisotropic information geometry of entropy production

We reveal that the information geometry of entropy production exhibits an intrinsic anisotropy, providing a unified origin for the inequivalent geometric constraints obeyed by its different components. Using a hierarchical projection structure of quantum relative entropy, we derive an exact orthogonal decomposition of...

Tomohiro Nishiyama, Yoshihiko Hasegawa · 0 citations
Preprint Jul 2026

Heisenberg Scaling in Many-Body Kinetic Uncertainty Relation via Quantum Feedback

Precision is a central figure of merit for quantum devices, including quantum clocks whose performance is determined by the stability of counting events. Kinetic uncertainty relations set fundamental limits on the precision of such counting observables, showing that their fluctuations cannot be suppressed without incre...

H. Yunoki, Yoshihiko Hasegawa · 0 citations

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