4 papers
Local Quantum Pure-state Identification without Classical Knowledge
Y. Ishida, T. Hashimoto, M. Horibe +1
Suppose we want to distinguish two quantum pure states. We consider the case in which no classical knowledge on the two states is given and only a pair of samples of the two states…
Nonlocality in unambiguous pure-state identification without classical knowledge
A. Hayashi, Y. Ishida, T. Hashimoto +1
For two bipartite pure states, we consider the problem of unambiguous identification without classical knowledge on the states. The optimal success probability by means of local op…
A lattice fermion without doubling
A. Hayashi, T. Hashimoto, M. Horibe +1
A free fermion without doubler is formulated on 1+D dimensional discrete Minkowski space-time. The action is not hermitian but causes no harm. In 1+3 dimensional massless case the…
Towards a Canonical Formalism of Field Theory on Discrete Spacetime
Hiroshi Yamamoto, Akihisa Hayashi, Takaaki Hashimoto +1
It is shown that the difficulties in formulating the quantum field theory on discrete spacetime appear already in classical dynamics of one degree of freedom on discrete time. The…