Entanglement in Strongly Correlated Quantum Many-body Systems
Weifei Li
Broschiertes Buch

Entanglement in Strongly Correlated Quantum Many-body Systems

Scaling Behavior of Entanglement

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In this thesis, the scaling behavior of entanglement is investigated in quantum systems with strongly fluctuating ground states. We relate the reduced density matrices of quadratic fermionic and bosonic models to their Green's function matrices in a unified way, and calculate exactly the scaling of the entanglement entropy of finite systems in an infinite universe. Our study shows that although in one dimension there is a unique relation between the quantum phase transition and the scaling behavior of entanglement, this is not necessarily true in higher dimensions. By exactly solving a spinles...