M
Marcus Cramer
Researcher at University of Ulm
Publications - 50
Citations - 8004
Marcus Cramer is an academic researcher from University of Ulm. The author has contributed to research in topics: Quantum entanglement & Quantum. The author has an hindex of 30, co-authored 49 publications receiving 6783 citations. Previous affiliations of Marcus Cramer include Imperial College London & University of Marburg.
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Colloquium: Area laws for the entanglement entropy
TL;DR: In this paper, the current status of area laws in quantum many-body systems is reviewed and a significant proportion is devoted to the clear and quantitative connection between the entanglement content of states and the possibility of their efficient numerical simulation.
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Quantifying Coherence
TL;DR: In this article, a rigorous framework for quantification of coherence and identification of intuitive and easily computable measures for coherence has been proposed by adopting coherence as a physical resource.
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Efficient quantum state tomography
Marcus Cramer,Martin B. Plenio,Steven T. Flammia,Rolando D. Somma,David Gross,Stephen D. Bartlett,Olivier Landon-Cardinal,David Poulin,Yi-Kai Liu +8 more
TL;DR: Two tomography schemes that scale much more favourably than direct tomography with system size are presented, one of them requires unitary operations on a constant number of subsystems, whereas the other requires only local measurements together with more elaborate post-processing.
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Exact relaxation in a class of nonequilibrium quantum lattice systems.
TL;DR: This work rigorously proves that the evolving state locally relaxes to a steady state with maximum entropy constrained by second moments--thus maximizing the entanglement.
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Entropy, entanglement, and area: analytical results for harmonic lattice systems
TL;DR: The question of the relation between entanglement, entropy, and area for harmonic lattice Hamiltonians corresponding to discrete versions of real free Klein-Gordon fields is revisit and the tools of quantum information science may help in establishing results in quantum field theory that were previously less accessible.