Quantum advantage in transfer of quantum states

• URL: http://arxiv.org/abs/2604.05915v1
• Date: Tue, 07 Apr 2026 14:16:22 GMT
• Title: Quantum advantage in transfer of quantum states
• Abstract summary: Quantum advantage is the ability of quantum systems to significantly outperform their classical counterparts.<n>Here, we uncover a novel niche where quantum advantage can be clearly defined and proven.<n>We prove that the quantum-mechanical property of a particle to propagate along several trajectories simultaneously speeds up the transfer process.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum advantage, broadly understood as the ability of quantum systems to significantly outperform their classical counterparts, underpins current interest to quantum technologies and is a topic of active investigation. In many situations, its existence is subject to debate, and the areas of supremacy of large-scale quantum systems are not well defined. Here, we uncover a novel niche where quantum advantage can be clearly defined and proven. We study a time-optimal transfer of excitations in the lattice involving both nearest-neighbor and longer-range couplings. We prove that the quantum-mechanical property of a particle to propagate along several trajectories simultaneously speeds up the transfer process, which takes a shorter time compared to any particular trajectory and thus provides a clear example of quantum advantage.

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