Subrahmanyam, V. How entangled is a many-electron state? (English) Zbl 1201.81019 Chandra, Anjan Kumar (ed.) et al., Quantum quenching, annealing and computation. Berlin: Springer (ISBN 978-3-642-11469-4/pbk). Lecture Notes in Physics 802, 201-214 (2010). Summary: Quantum entanglement is perceived as a resource for quantum communication and information processing and has emerged over the last few years as a major research area in various diverse fields such as physics, mathematics, chemistry, electrical engineering, and computer science [M. A. Nielsen and I. L. Chuang, Quantum computation and quantum information. Cambridge: Cambridge University Press (2000; Zbl 1049.81015); G. Benenti, G. Casati and G. Strini, Principles of quantum computation and information. Vol. II: Basic tools and special topics. Hackensack, NJ: World Scientific (2007; Zbl 1119.81002)]. Entanglement in a quantum state is a signature of quantum correlations between different spatial parts of the system. Consider a bipartite system, consisting of two parts \(A\) and \(B\), in a pure state. Let \(\|A_i\rangle\), \(i=1,N\), be a set of orthogonal basis states for the subsystem \(A\), and similarly \(|B_i\rangle\), \(i=1,M\), be an orthogonal basis for the subsystem \(B\). Let the total system be described by a pure state.For the entire collection see [Zbl 1191.81003]. MSC: 81P40 Quantum coherence, entanglement, quantum correlations 81P45 Quantum information, communication, networks (quantum-theoretic aspects) 81V70 Many-body theory; quantum Hall effect 82D55 Statistical mechanics of superconductors Citations:Zbl 1049.81015; Zbl 1119.81002 PDFBibTeX XMLCite \textit{V. Subrahmanyam}, Lect. Notes Phys. 802, 201--214 (2010; Zbl 1201.81019) Full Text: DOI