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arXiv 2303.04342quant-ph
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非平移不变线性格上的双粒子散射

Two-Particle Scattering on Non-Translation Invariant Line Lattices

Luna Lima e Silva, Daniel Jost Brod

AI总结:

本文研究非平移不变线性格中的双粒子散射,提出系统求解框架并恢复 Bose-Hubbard 极限,证明局部相互作用可高保真实现 CPHASE 门。

摘要:

量子行走自诞生以来就被用于开发量子算法,并可被视为通常电路模型的一种替代方案;将稀疏图上的单粒子量子行走与线性格上的双粒子散射相结合,足以执行通用量子计算。在本工作中,我们针对一类不具有平移不变性的相互作用,求解了线性格上的双粒子散射问题,并将 Bose-Hubbard 相互作用恢复为极限情形。由于其通用性,我们的系统化方法为求解一般图上更普遍的多粒子散射问题奠定了基础,而这反过来又能够促成不同或更简单的量子门和量子配件设计。作为本工作的结果,我们表明,当相互作用仅作用于线图的一小部分时,就可以高保真度实现 CPHASE 门。

英文摘要:

Quantum walks have been used to develop quantum algorithms since their inception, and can be seen as an alternative to the usual circuit model; combining single-particle quantum walks on sparse graphs with two-particle scattering on a line lattice is sufficient to perform universal quantum computation. In this work we solve the problem of two-particle scattering on the line lattice for a family of interactions without translation invariance, recovering the Bose-Hubbard interaction as the limiting case. Due to its generality, our systematic approach lays the groundwork to solve the more general problem of multi-particle scattering on general graphs, which in turn can enable design of different or simpler quantum gates and gadgets. As a consequence of this work, we show that a CPHASE gate can be achieved with high fidelity when the interaction acts only on a small portion of the line graph.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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