Erschienen: 15.07.2013 Abbildung von Wichterich | Entanglement Between Noncomplementary Parts of Many-Body Systems | 2013

Wichterich

Entanglement Between Noncomplementary Parts of Many-Body Systems

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2013. Buch. xii, 116 S. Bibliographien. Softcover

Springer. ISBN 978-3-642-26829-8

Format (B x L): 15,5 x 23,5 cm

Gewicht: 207 g

In englischer Sprache

Das Werk ist Teil der Reihe: Springer Theses

Produktbeschreibung

This thesis investigates the structure and behaviour of entanglement, the purely quantum mechanical part of correlations, in many-body systems, employing both numerical and analytical techniques at the interface of condensed matter theory and quantum information theory. Entanglement can be seen as a precious resource which, for example, enables the noiseless and instant transmission of quantum information, provided the communicating parties share a sufficient "amount" of it. Furthermore, measures of entanglement of a quantum mechanical state are perceived as useful probes of collective properties of many-body systems. For instance, certain measures are capable of detecting and classifying ground-state phases and, particularly, transition (or critical) points separating such phases. Chapters 2 and 3 focus on entanglement in many-body systems and its use as a potential resource for communication protocols. They address the questions of how a substantial amount of entanglement can be established between distant subsystems, and how efficiently this entanglement could be "harvested" by way of measurements. The subsequent chapters 4 and 5 are devoted to universality of entanglement between large collections of particles undergoing a quantum phase transition, where, despite the enormous complexity of these systems, collective properties including entanglement no longer depend crucially on the microscopic details.    

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