Perfect state transfer in long-range interacting spin chains

2008/07/31 by Giulia Gualdi, Vojtech Kostak, Irene Marzoli +1 · 4 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #quant-ph

paper · pdf · doi:10.1103/physreva.78.022325

5 pages, 5 figures

arxiv created 2008/07/31 · openalex publication_date 2008/08/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate the most general conditions under which a finite ferromagnetic long-range interacting spin chain achieves unitary fidelity and the shortest transfer time in transmitting an unknown input qubit. A deeper insight into system dynamics, allows us to identify an ideal system involving sender and receiver only. However, this two-spin ideal chain is unpractical due to the rapid decrease of the coupling strength with the distance. Therefore, we propose an optimization scheme for approaching the ideal behavior, while keeping the interaction strength still reasonably high. The procedure is scalable with the size of the system and straightforward to implement.

Citations

• Qubit Teleportation and Transfer across Antiferromagnetic Spin Chains
• Mirror Inversion of Quantum States in Linear Registers

Cited by

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• Remote control of quantum correlations in a two-qubit receiver by a three-qubit sender
• Restoring of quantum state transferred along XY-spin chain and entanglement evolution
• Two-channel spin-chain communication line and simple quantum gates