22 citations · 22 across the 2 of their papers we have counts for
5 papers · 1 filter
Quantum algorithms for Uhlmann transformation
Takeru Utsumi, Yoshifumi Nakata, Qisheng Wang +1
Uhlmann's theorem is a central result in quantum information theory, which associates the closeness of two quantum states with that of their purifications. The theorem also well ch…
On Computational Complexity of Unitary and State Design Properties
Yoshifumi Nakata, Yuki Takeuchi, Martin Kliesch +1
We investigate unitary and state -designs from a computational complexity perspective. First, we address the problems of computing frame potentials that characterize (approximat…
Quantum circuits for exact unitary -designs and applications to higher-order randomized benchmarking
Yoshifumi Nakata, Da Zhao, Takayuki Okuda +9
A unitary -design is a powerful tool in quantum information science and fundamental physics. Despite its usefulness, only approximate implementations were known for general .…
One-shot quantum error correction of classical and quantum information
Yoshifumi Nakata, Eyuri Wakakuwa, Hayata Yamasaki
Quantum error correction (QEC) is one of the central concepts in quantum information science and also has wide applications in fundamental physics. The capacity theorems provide so…
Thermal robustness of multipartite entanglement of the 1-D spin 1/2 XY model
Yoshifumi Nakata, Damian Markham, Mio Murao
We study the robustness of multipartite entanglement of the ground state of the one-dimensional spin 1/2 XY model with a transverse magnetic field in the presence of thermal excita…