High-fidelity state transfer in binary-tree spin networks

2008/07/31 by Tommaso Tufarelli, T. Tufarelli, Vittorio Giovannetti +1 · 1 citation
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.79.022313

published as Physical Review A 79, 022313 (2009) · 6 pages, 2 figures

arxiv created 2008/12/05 · openalex publication_date 2009/02/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Quantum state propagation over binary-tree configurations is studied in the context of quantum spin networks. For a binary tree of order 2, a simple protocol is presented which allows one to achieve arbitrary high transfer fidelity. It does not require fine-tuning of local fields and two-node coupling of the intermediate spins. Instead it assumes simple local operations on the intended receiving node: their role is to brake the transverse symmetry of the network that induces an effective refocusing of the propagating signals. Some ideas on how to scale up these effects to a binary tree of arbitrary order are discussed.

Citations

• Quantum Computation and Decision Trees
• Mirror Inversion of Quantum States in Linear Registers
• Quantum-state engineering with Josephson-junction devices
• Perfect transfer of arbitrary states in quantum spin networks

Cited by

• Surface entanglement in quantum spin networks

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• Teleportation Fidelity of Binary Tree Quantum Repeater Networks
• Quantum state transfer on distance regular spin networks with intrinsic decoherence
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