1 citations · 3 across the 4 of their papers we have counts for
10 papers
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…
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…
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…
Entanglement Breaking Channels
Mary Beth Ruskai
This paper has been removed and is superceded by a pair of papers on stochastic maps, or channels, which break entanglement (EBT). quant-ph/0302031 General Entanglement Breaking Ch…
Comments on Adiabatic Quantum Algorithms
Mary Beth Ruskai
Recently a method for adiabatic quantum computation has been proposed and there has been considerable speculation about its efficiency for NP-complete problems. Heuristic arguments…
Pauli Exchange and Quantum Error Correction
M. B. Ruskai
In many physically realistic models of quantum computation, Pauli exchange interactions cause a special type of two-qubit errors, called exchange errors, to occur as a first order…