activity
20052024
most citedSimplifying additivity problems using direct sum constructions

74 citations · 374 across the 25 of their papers we have counts for

collaborators

25 papers

quant-ph2024★ 1 cited

Concentration of quantum channels with random Kraus operators via matrix Bernstein inequality

Motohisa Fukuda

In this study, we generate quantum channels with random Kraus operators to typically obtain almost twirling quantum channels and quantum expanders. To prove the concentration pheno…

physics.comp-ph2023★ 2 cited

Symbolically integrating tensor networks over various random tensors by the second version of Python RTNI

Motohisa Fukuda

We are upgrading the Python-version of RTNI, which symbolically integrates tensor networks over the Haar-distributed unitary matrices. Now, PyRTNI2 can treat the Haar-distributed o…

math.CO2021

Generating series and matrix models for meandric systems with one shallow side

Motohisa Fukuda, Ion Nechita

In this article, we investigate meandric systems having one shallow side: the arch configuration on that side has depth at most two. This class of meandric systems was introduced a…

math-ph2021

Additivity violation of quantum channels via strong convergence to semi-circular and circular elements

Motohisa Fukuda, Takahiro Hasebe, Shinya Sato

Additivity violation of minimum output entropy, which shows non-classical properties in quantum communication, had been proved in most cases for random quantum channels defined by…

cs.CV2020★ 17 cited

Central object segmentation by deep learning for fruits and other roundish objects

Motohisa Fukuda, Takashi Okuno, Shinya Yuki

We present CROP (Central Roundish Object Painter), which identifies and paints the object at the center of an RGB image. Primarily CROP works for roundish fruits in various illumin…

quant-ph2019★ 18 cited

Typical entanglement for Gaussian states

Motohisa Fukuda, Robert Koenig

We consider ensembles of bipartite states resulting from a random passive Gaussian unitary applied to a fiducial pure Gaussian state. We show that the symplectic spectra of the red…