1 citations · 2 across the 3 of their papers we have counts for
3 papers
quant-ph2004
Qubit Channels Which Require Four Inputs to Achieve Capacity: Implications for Additivity Conjectures
Masahito Hayashi, Hiroshi Imai, Keiji Matsumoto +2
An example is given of a qubit quantum channel which requires four inputs to maximize the Holevo capacity. The example is one of a family of channels which are related to 3-state c…
quant-ph2003★ 1 cited
Some Bipartite States do not Arise from Channels
Mary Beth Ruskai
It is well-known that the action of a quantum channel on a state can be represented, using an auxiliary space, as the partial trace of an associated bipartite state. Recently, it w…
quant-ph2003★ 1 cited
Permutationally Invariant Codes for Quantum Error Correction
Harriet Pollatsek, Mary Beth Ruskai
A permutationally invariant n-bit code for quantum error correction can be realized as a subspace stabilized by the non-Abelian group S_n. The code corresponds to bases for the tri…