6 papers
Reliability of asymptotic work extraction
Kaito Watanabe, Bartosz Regula, Marco Tomamichel +1
Extracting work from quantum states is a fundamental task in quantum thermodynamics. Previous studies have primarily focused on determining the best achievable rate of work extract…
Information Hierarchy in Many-Body Berry Phase
Kai Watanabe
Many-body topology is a central concept in modern theories of solids, and identifying effective degrees of freedom that capture it is important both fundamentally and practically.…
An Exact Conjugation Identity for the Many-Body Wilson-Loop Beyond Quantization
Kai Watanabe
Constraints on the unquantized many-body holonomy are less explored than their quantized counterparts. Here we realize an unquantized regime by tuning the bond dimerization an…
Universal work extraction in quantum thermodynamics
Kaito Watanabe, Ryuji Takagi
Evaluating the maximum amount of work extractable from a nanoscale quantum system is one of the central problems in quantum thermodynamics. Previous works identified the free energ…
Symmetry-enforced agreement of Kohn--Sham and many-body Berry phases in the SSH--Hubbard chain
Kai Watanabe
We study when a density-matching Kohn--Sham (KS) description can reproduce a many-body Berry phase in a correlated insulator, despite the fact that geometric phases are functionals…
Black Box Work Extraction and Composite Hypothesis Testing
Kaito Watanabe, Ryuji Takagi
Work extraction is one of the most central processes in quantum thermodynamics. However, the prior analysis of optimal extractable work has been restricted to a limited operational…