6533b82efe1ef96bd1293232
RESEARCH PRODUCT
Local Quench, Majorana Zero Modes, and Disturbance Propagation in the Ising chain
N. Lo GulloTony J. G. ApollaroGianluca FrancicaFrancesco Plastinasubject
Physics---Phase transitionQuantum PhysicsCondensed matter physicsFOS: Physical sciencesFermion01 natural sciences010305 fluids & plasmasMAJORANAQuantum Gases (cond-mat.quant-gas)Quantum mechanics0103 physical sciencesQuasiparticleIsing model010306 general physicsQuantum Physics (quant-ph)Condensed Matter - Quantum GasesLocal fieldPhase diagramSpin-½description
We study the generation and propagation of local perturbations in a quantum many-body spin system. In particular, we study the Ising model in transverse field in the presence of a local field defect at one edge. This system possesses a rich phase diagram with different regions characterized by the presence of one or two Majorana zero modes. We show that their localized character {\it i}) enables a characterization of the Ising phase transition through a local-only measurement performed on the edge spin, and {\it ii}) strongly affects the propagation of quasiparticles emitted after the sudden removal of the defect, so that the dynamics of the local magnetization show clear deviations from a ballistic behavior in presence of the Majorana fermions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-10-08 |