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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/141725
Entanglement in Quantum Critical Phenomena
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Entanglement, one of the most intriguing features of quantum theory and a main resource in quantum information science, is expected to play a crucial role also in the study of quantum phase transitions, where it is responsible for the appearance of long-range correlations. We investigate, through a microscopic calculation, the scaling properties of entanglement in spin chain systems, both near and at a quantum critical point. Our results establish a precise connection between concepts of quantum information, condensed matter physics, and quantum field theory, by showing that the behavior of critical entanglement in spin systems is analogous to that of entropy in conformal field theories. We explore some of the implications of this connection.
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VIDAL, G., et al. Entanglement in Quantum Critical Phenomena. Physical Review Letters. 2003. Vol. 90, num. 22, pags. 227902. ISSN 0031-9007. [consulted: 9 of October of 2026]. Available at: https://hdl.handle.net/2445/141725