Nadal Vidal Jose Israel

Coherent Ergotropy and Quantum Fisher Information: An Exact Two-Level Identity, a Non-Universal Fisher Bound, and an Anisotropic Coherence Horizon

The coherent ergotropy of a quantum system—the work extractable by unitary control that is stored in energy-basis coherences—is usually treated as a purely thermodynamic quantity. This preprint establishes its exact geometric content for a two-level system and precisely delineate...