4 papers
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…
Do black holes store negative entropy?
Koji Azuma, Sathyawageeswar Subramanian, Go Kato
The Bekenstein-Hawking equation states that black holes should have entropy proportional to their areas to make black hole physics compatible with the second law of thermodynamics.…
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…