Qubit(s) transfer in helical spin chains

TL;DR

This paper investigates the transfer of qubits and entangled states through helical multiferroic spin chains, demonstrating electric field control to enhance fidelity despite impurities.

Contribution

It introduces a scheme using electric field pulses to improve qubit transfer fidelity in multiferroic spin chains, accounting for impurities.

Findings

Electric field pulses enhance transfer fidelity.

Impurities' effects are mitigated by the pulse scheme.

Efficient transfer of single and Bell states achieved.

Abstract

Qubit(s) transfer through a helical chain is studied. We consider the transfer of a single state and Bell states across a multiferroic spin chain and the possibility of an electric field control of the fidelity of the single state and the Bell pairs. We analyze pure and imperfect multiferroic spin chains. A scheme for an efficient transfer of spin states through a multiferroic channel relies on kicking by appropriate electric field pulses at regular interval. This electric field pulse sequence undermines the effect of impurity on the fidelity and improves the state transfer through the helical chain.