Projects per year
Abstract
We study the time evolution of entanglement created by local or extended excitations upon the ground state of a freefermion chain. A single particle or hole excitation produces a single bit of excess entropy for large times and subsystem lengths. In case of a double hole, some of the coherence between the excitations is preserved and the excess entropy becomes additive only for large hole separations. In contrast, the coherence is always lost for particlehole excitations. Multiple hole excitations on a completely filled chain are also investigated. We find that for an extended contiguous hole the excess entropy scales logarithmically with the size, whereas the increase is linear for finite separations between the holes.
Original language  English 

Article number  424002 
Journal  Journal of Physics A: Mathematical and Theoretical 
Volume  54 
Issue number  42 
DOIs  
Publication status  Published  22 Oct 2021 
Keywords
 condmat.statmech
 quantph
 entanglement
 freefermion chain
 excitations
ASJC Scopus subject areas
 Physics and Astronomy(all)
 Statistical and Nonlinear Physics
 Statistics and Probability
 Mathematical Physics
 Modelling and Simulation
Projects
 1 Finished

FWFVerschränkungen  Quantum fronts and entaglement driven by inhomogeneities
1/09/17 → 31/07/21
Project: Research project