ETD system

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Tesi etd-09242019-191346


Thesis type
Tesi di laurea magistrale
Author
BALDELLI, NICCOLO'
URN
etd-09242019-191346
Title
Detection of anyonic statistics in p-wave superfluids
Struttura
FISICA
Corso di studi
FISICA
Supervisors
relatore Dott. Mazza, Leonardo
correlatore Dott. Rossini, Davide
commissario Prof. Mannella, Riccardo
commissario Prof. Fidecaro, Francesco
commissario Prof. Forti, Francesco
commissario Prof. Guadagnini, Enore
commissario Prof. Leporini, Dino
commissario Prof. Roddaro, Stefano
commissario Prof. Shore, Steven Neil
Parole chiave
  • anyons
  • superfluids
  • exact diagonalization
Data inizio appello
16/10/2019;
Consultabilità
Secretata d'ufficio
Data di rilascio
16/10/2089
Riassunto analitico
We deal with the problem of finding an experimentally-doable way of detecting anyons. We focus on cold-atom experiments. The presence of anyons in trapped cold atoms gases can be linked to the measurements of local observables on the ground states of the system. This idea has currently been used to study Fractional Quantum Hall states with quasi-holes excitations. We apply the same reasoning to 2D p-wave superfluids, that can host anyons in vortices in the order parameter. We extend the analytical calculations developed for quasi-holes to vortices, showing that we need the expected values of the angular momentum and particle number observables on the ground state to retrieve the presence of anyons. To validate the conclusions of the analytical calculation we wrote a custom Python code to perform exact diagonalization on the discretized Hamiltonian of the system, in order to retrieve its ground upon which calculate the matrix elements of the observables. In the meanwhile we also discuss various benchmark that we ran on approximate version of the system's Hamiltonian to check for the correct implementation of the algorithm and how the parameters of the simulation were set to obtain to correctly extrapolate the system in the continuum limit. Finally, we discuss several ways we employed to build an angular momentum operator on this system and the issues that arise when trying to compute the ground states expectation values of these lattice operators.
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