6533b850fe1ef96bd12a84ca
RESEARCH PRODUCT
Dynamics of entanglement in one-dimensional spin systems
Andreas OsterlohG. Massimo PalmaRosario FazioFrancesco PlastinaLuigi Amicosubject
PhysicsQuantum PhysicsBell stateStrongly Correlated Electrons (cond-mat.str-el)STATISTICAL MECHANICSFOS: Physical sciencesXY-MODELQuantum PhysicsQuantum entanglementSquashed entanglementMultipartite entanglementQUANTUM STATESAtomic and Molecular Physics and OpticsCondensed Matter - Strongly Correlated ElectronsLocal hidden variable theoryBell's theoremQuantum mechanicsSTATISTICAL MECHANICS; QUANTUM STATES; XY-MODELQuantum Physics (quant-ph)Entanglement witnessQuantum computerdescription
We study the dynamics of quantum correlations in a class of exactly solvable Ising-type models. We analyze in particular the time evolution of initial Bell states created in a fully polarized background and on the ground state. We find that the pairwise entanglement propagates with a velocity proportional to the reduced interaction for all the four Bell states. Singlet-like states are favored during the propagation, in the sense that triplet-like states change their character during the propagation under certain circumstances. Characteristic for the anisotropic models is the instantaneous creation of pairwise entanglement from a fully polarized state; furthermore, the propagation of pairwise entanglement is suppressed in favor of a creation of different types of entanglement. The ``entanglement wave'' evolving from a Bell state on the ground state turns out to be very localized in space-time. Further support to a recently formulated conjecture on entanglement sharing is given.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-07-07 | Physical Review A |