Transient entanglement in a spin chain stimulated by phase pulses

TL;DR

This paper investigates how applying phase pulses to a one-dimensional open Ising spin chain can generate perfect entanglement between its ends, with the entanglement dynamics and scaling analyzed.

Contribution

It introduces a specific pulse sequence that induces perfect end-to-end entanglement and provides analytic formulas for the concurrence dynamics.

Findings

Perfect dynamical entanglement between chain ends achieved

Entanglement time scales linearly with chain length

Final entangled state is independent of chain length

Abstract

Dynamics of the one-dimensional open Ising chain under influence of $\pi$ -pulses is studied. It is shown that the application of a specific sequence of such instant kicks to selective spins stimulates arising of perfect dynamical pairwise entanglement between ends of the spin chain. Analytic formulas for the concurrence dynamics are derived. It is also shown that the time required to perfectly entangle the ends of the chains grows linearly with the number of spins in the chain. The final entangled state of the ending spins is always the same and does not depend on length the chain.