71 citations · 381 across the 24 of their papers we have counts for
5 papers · 1 filter
Even-freeness of cyclic 2-designs
Yuichiro Fujiwara
A Steiner 2-design of block size k is an ordered pair (V, B) of finite sets such that B is a family of k-subsets of V in which each pair of elements of V appears exactly once. A St…
Sparseness of 4-cycle systems
Yuichiro Fujiwara, Shung-Liang Wu, Hung-Lin Fu
An avoidance problem of configurations in 4-cycle systems is investigated by generalizing the notion of sparseness, which is originally from Erdős' r-sparse conjecture on Steiner t…
High-rate self-synchronizing codes
Yuichiro Fujiwara, Vladimir D. Tonchev
Self-synchronization under the presence of additive noise can be achieved by allocating a certain number of bits of each codeword as markers for synchronization. Difference systems…
Parsing a sequence of qubits
Yuichiro Fujiwara
We develop a theoretical framework for frame synchronization, also known as block synchronization, in the quantum domain which makes it possible to attach classical and quantum met…
Block synchronization for quantum information
Yuichiro Fujiwara
Locating the boundaries of consecutive blocks of quantum information is a fundamental building block for advanced quantum computation and quantum communication systems. We develop…