Universal Upper Bound on Ergotropy and No-Go Theorem by the Eigenstate Thermalization Hypothesis

Author(s): Akihiro Hokkyo and Masahito Ueda We show that the maximum extractable work (ergotropy) from a quantum many-body system is constrained by “local athermality” of an initial state and “local entropy decrease” brought about by quantum operations. The obtained universal upper bound on ergotropy implies that the eigenstate thermalization… [Phys. Rev. Lett. 134, 010406] Published Mon Jan 06, 2025