Quantum-state transfer on spin-chain channels with random imperfection

TL;DR

This paper proposes a new quantum-state transfer protocol on spin-chain channels that combines existing schemes to reduce noise and improve robustness against imperfections, enhancing transfer efficiency.

Contribution

It introduces a hybrid protocol that mitigates quantum noise and decoherence in spin-chain channels, outperforming previous methods in robustness and efficiency.

Findings

The new protocol reduces quantum noise during transfer.

It improves robustness against coupling fluctuations.

It achieves higher transfer efficiency than previous schemes.

Abstract

We investigate the quantum-state transfer on spin-chian channels with random imperfections.Through combining the advantages of two known schemes, the dual-rail spin-chain channels[9] and the particular ihhomogenous spin-chain channel[10], we propose a protocol that can avoid the quantum noises introduced by many unnecessary measurements and can enhance the anti-decoherence ability. The results show that our protocol is more efficient to transfer an arbitrary quantum state than the original one. In particular, we discuss the effects of couplings fluctuations and imperfect initialization on both of the improved scheme and original one.