4 papers · 1 filter
Multicast quantum network coding as optimal symmetric universal cloning over a quantum network
Go Kato, Mio Murao, Masaki Owari
We study the problem of perfectly multicasting symmetric universal clones of unknown quantum states over quantum networks with free classical communication. We construct a protocol…
Security framework for quantum key distribution with imperfect sources
Guillermo Currás-Lorenzo, Margarida Pereira, Go Kato +2
Imperfect bit-and-basis encoders compromise the security of quantum key distribution (QKD) systems via modulation flaws, side channels and inter-pulse correlations, which invalidat…
On algebraic analysis of Baker-Campbell-Hausdorff formula for Quantum Control and Quantum Speed Limit
Go Kato, Masaki Owari, Koji Maruyama
The necessary time required to control a many-body quantum system is a critically important issue for the future development of quantum technologies. However, it is generally quite…
Probabilistic unitary synthesis with optimal accuracy
Seiseki Akibue, Go Kato, Seiichiro Tani
The purpose of unitary synthesis is to find a gate sequence that optimally approximates a target unitary transformation. A new synthesis approach, called probabilistic synthesis, h…