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Tesi etd-09022014-003543


Thesis type
Tesi di laurea magistrale
Author
FACOETTI, DAVIDE
URN
etd-09022014-003543
Title
Entanglement in one-dimensional systems with interfaces and defects
Struttura
FISICA
Corso di studi
FISICA
Commissione
relatore Calabrese, Pasquale
relatore Mintchev, Mihail
Parole chiave
  • Conformal Field Theory
  • Entanglement
  • Defects
  • Many-body theory
  • Quantum wires
  • Boundary Quantum Field Theory
Data inizio appello
20/10/2014;
Consultabilità
completa
Riassunto analitico
The study of entanglement measures is of interest in various fields of physics. Entanglement entropy and negativity are computable using field theoretical techniques, providing a meeting point between many-body and high energy physics. This work studies such measures in extended one-dimensional systems with defects or junctions.

The focus is on critical systems, where CFT techniques can be used, and defects which do not break criticality. Universal results are obtained using Boundary CFT, in particular for the free boson theory. Its lattice version, the quantum harmonic chain is also studied, and used for numerical simulations. Junctions of more than two system at a vertex are studied using the techniques of QFT on star graphs.
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