195 citations
- Pennsylvania State UniversityUS3 papers
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- Universitat de BarcelonaES3 papers
- University of SussexGB3 papers
- University of California, DavisUS2 papers
- Academia SinicaTW1 paper
- Arab Foundations ForumJO1 paper
- Argonne National LaboratoryUS1 paper
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- Brookhaven National LaboratoryUS1 paper
- California Institute of TechnologyUS1 paper
- China Center of Advanced Science and TechnologyCN1 paper
7 papers · 1 filter
Qubit channels with small correlations
Filippo Caruso, Vittorio Giovannetti, Chiara Macchiavello +1
We introduce a class of quantum channels with correlations acting on pairs of qubits, where the correlation takes the form of a shift operator onto a maximally entangled state. We…
Some Open Problems in Quantum Information Theory
Mary Beth Ruskai
Some open questions in quantum information theory (QIT) are described. Most of them were presented in Banff during the BIRS workshop on Operator Structures in QIT 11-16 February 20…
From Dirac to Diffusion: Decoherence in Quantum Lattice Gases
Peter J. Love, Bruce M. Boghosian
We describe a model for the interaction of the internal (spin) degree of freedom of a quantum lattice-gas particle with an environmental bath. We impose the constraints that the pa…
Vacuum fluctuations and Brownian motion of a charged test particle near a reflecting boundary
Hongwei Yu, L. H. Ford
We study the Brownian motion of a charged test particle coupled to electromagnetic vacuum fluctuations near a perfectly reflecting plane boundary. The presence of the boundary modi…
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…