Dagmar Bruss

TL;DR: In this paper, the authors present an excerpt of the document "Quantum Information Processing and Communication: Strategic report on current status, visions and goals for research in Europe", which has been recently published in electronic form at the website of FET (the Future and Emerging Technologies Unit of the Directorate General Information Society of the European Commission).

TL;DR: This article presents a primer on the current state of knowledge concerning two problems of quantum information theory, and discusses the relation of these problems to one of the most challenging questions of linear algebra: the classification and characterization of positive operator maps.

TL;DR: The quantum-mechanical background needed to present some fundamental protocols from quantum cryptography is provided, and quantum key distribution via the BB84 protocol and its security proof are reviewed.

TL;DR: In this paper, the role of entanglement for transmission of classical information through a memoryless depolarizing channel was analyzed and it was shown analytically that the mutual information cannot be increased by encoding classical bits into entangled states of two qubits.

TL;DR: In this paper, the authors investigated super dense coding in the presence of noise, i.e., the subsystems of the entangled resource state have to pass a noisy unital quantum channel between the sender and the receiver.