2 research outputs found
Quasiparticle Mass Enhancement as a Measure of Entanglement in the Kondo Problem
We analyze the quantum entanglement between opposite spin projection electrons in the ground state of the Anderson impurity model. In this model, a single level impurity with intralevel repulsion U is tunnel coupled to a free electron gas. The Anderson model presents a strongly correlated many body ground state with mass enhanced quasiparticle excitations. We find, using both analytical and numerical tools, that the quantum entanglement between opposite spin projection electrons is a monotonic universal function of the quasiparticle mass enhancement Z in the Kondo regime. This indicates that the interaction induced mass enhancement, which is generally used to quantify correlations in quantum many body systems, could be used as a measure of entanglement in the Kondo problem.Fil: 脕lvarez Pari, Nayra A.. Comisi贸n Nacional de Energ铆a At贸mica. Gerencia del 脕rea Investigaciones y Aplicaciones No Nucleares. Gerencia de F铆sica (CAB). Grupo de Teor铆a de S贸lidos; Argentina. Comisi贸n Nacional de Energ铆a At贸mica. Gerencia del 脕rea de Energ铆a Nuclear. Instituto Balseiro; ArgentinaFil: Garcia, Daniel Julio. Comisi贸n Nacional de Energ铆a At贸mica. Gerencia del 脕rea Investigaciones y Aplicaciones No Nucleares. Gerencia de F铆sica (CAB). Grupo de Teor铆a de S贸lidos; Argentina. Comisi贸n Nacional de Energ铆a At贸mica. Gerencia del 脕rea de Energ铆a Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Centro Cient铆fico Tecnol贸gico Conicet - Patagonia Norte; ArgentinaFil: Cornaglia de la Cruz, Pablo Sebastian. Comisi贸n Nacional de Energ铆a At贸mica. Gerencia del 脕rea Investigaciones y Aplicaciones No Nucleares. Gerencia de F铆sica (CAB). Grupo de Teor铆a de S贸lidos; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Centro Cient铆fico Tecnol贸gico Conicet - Patagonia Norte; Argentin