Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Masahito Hayashi, Hiroshi Imai, Keiji Matsumoto, Mary Beth Ruskai, Toshiyuki Shimono. Qubit channels which require four inputs to achieve capacity: implications for additivity conjectures. Quantum Information & Computation, 5(1):13-31, 2005. [doi]