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76 papers · 1 filter
On a Periodic Soliton Cellular Automaton
Fumitaka Yura, Tetsuji Tokihiro
We propose a box and ball system with a periodic boundary condition (pBBS). The time evolution rule of the pBBS is represented as a Boolean recurrence formula, an inverse ultradisc…
Lower Bounds on the Quantum Capacity and Highest Error Exponent of General Memoryless Channels
Mitsuru Hamada
Tradeoffs between the information rate and fidelity of quantum error-correcting codes are discussed. Quantum channels to be considered are those subject to independent errors and m…
Cloning of symmetric d-level photonic states in physical systems
Heng Fan, Gregor Weihs, Keiji Matsumoto +1
Optimal procedures play an important role in quantum information. It turns out that some naturally occurring processes like emission of light from an atom can realize optimal trans…
Neutron Scattering Study of the Spin Correlation in the Spin Ice System Ho2Ti2O7
Masaki Kanada, Yukio Yasui, Yasuyuki Kondo +7
Intensity distribution of the neutron magnetic scattering has been taken in the reciprocal space of a single crystal of the "spin ice" system Ho2Ti2O7 at the elastic energy positio…
Topological Origin of Zero-Energy Edge States in Particle-Hole Symmetric Systems
Shinsei Ryu, Yasuhiro Hatsugai
A criterion to determine the existence of zero-energy edge states is discussed for a class of particle-hole symmetric Hamiltonians. A ``loop'' in a parameter space is assigned for…
Electrically-Controlled Nuclear Spin Polarization and Relaxation by Quantum-Hall states
K. Hashimoto, K. Muraki, T. Saku +1
We investigate interactions between electrons and nuclear spins by using the resistance (Rxx) peak which develops near filling factor n = 2/3 as a probe. By temporarily tuning n to…