191 citations · 1.6k across the 34 of their papers we have counts for
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Application of the Resource Theory of Channels to Communication Scenarios
Ryuji Takagi, Kun Wang, Masahito Hayashi
We introduce a resource theory of channels relevant to communication via quantum channels, in which the set of constant channels --- useless channels for communication tasks --- is…
Benchmarking one-shot distillation in general quantum resource theories
Bartosz Regula, Kaifeng Bu, Ryuji Takagi +1
We study the one-shot distillation of general quantum resources, providing a unified quantitative description of the maximal fidelity achievable in this task, and revealing similar…
Universal limitations on implementing resourceful unitary evolutions
Ryuji Takagi, Hiroyasu Tajima
We derive a trade-off relation between the accuracy of implementing a desired unitary evolution using a restricted set of free unitaries and the size of the assisting system, in te…
Assisted concentration of Gaussian resources
Ludovico Lami, Ryuji Takagi, Gerardo Adesso
In spite of their outstanding experimental relevance, Gaussian operations in continuous-variable quantum systems are subjected to fundamental limitations, as it is known that gener…
One-Shot Operational Quantum Resource Theory
Zi-Wen Liu, Kaifeng Bu, Ryuji Takagi
A fundamental approach for the characterization and quantification of all kinds of resources is to study the conversion between different resource objects under certain constraints…
Activation and superactivation of single-mode Gaussian quantum channels
Youngrong Lim, Ryuji Takagi, Gerardo Adesso +1
Activation of quantum capacity is a surprising phenomenon according to which the quantum capacity of a certain channel may increase by combining it with another channel with zero q…
General Resource Theories in Quantum Mechanics and Beyond: Operational Characterization via Discrimination Tasks
Ryuji Takagi, Bartosz Regula
We establish an operational characterization of general convex resource theories -- describing the resource content of not only states, but also measurements and channels, both wit…