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One Dimensional ary Density Classification Using Two Cellular Automaton Rules
H. F. Chau, L. W. Siu, K. K. Yan
Suppose each site on a one-dimensional chain with periodic boundary condition may take on any one of the states , can you find out the most frequently occurring state…
Good Quantum Convolutional Error Correction Codes And Their Decoding Algorithm Exist
H. F. Chau
Quantum convolutional code was introduced recently as an alternative way to protect vital quantum information. To complete the analysis of quantum convolutional code, I report a wa…
Efficient Quantum Key Distribution
M. Ardehali, H. F. Chau, Hoi-Kwong Lo
We devise a simple modification that essentially doubles the efficiency of a well-known quantum key distribution scheme proposed by Bennett and Brassard (BB84). Our scheme assigns…
Unconditional Security Of Quantum Key Distribution Over Arbitrarily Long Distances
Hoi-Kwong Lo, H. F. Chau
Quantum key distribution is widely thought to offer unconditional security in communication between two users. Unfortunately, a widely accepted proof of its security in the presenc…