全连接量子计算机中时间最优量子态传输

IF 5.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Quantum Science and Technology Pub Date : 2023-10-26 DOI:10.1088/2058-9565/ad0770

Casey Jameson, Bora Basyildiz, Daniel Moore, Kyle Clark, Zhexuan Gong

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引用次数: 1

摘要

粒子相互作用系统中量子态转移(QST)的速度限制不仅对量子信息处理很重要，而且与理解量子多体物理的各个方面至关重要的lieb - robinson型边界直接相关。对于强远程相互作用系统，如全连接量子计算机，这样的速度限制仍然是未知的。本文提出了一种新的量子Brachistochrone方法，该方法可以在哈密顿算子上加入不等式约束。这种方法使我们能够证明在哈密顿子类上QST速度的精确紧界，该速度可以在全连接量子计算机上实验实现。

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Time optimal quantum state transfer in a fully-connected quantum computer

Abstract The speed limit of quantum state transfer (QST) in a system of interacting particles is not only important for quantum information processing, but also directly linked to Lieb-Robinson-type bounds that are crucial for understanding various aspects of quantum many-body physics. For strongly long-range interacting systems such as a fully-connected quantum computer, such a speed limit is still unknown. Here we develop a new Quantum Brachistochrone method that can incorporate inequality constraints on the Hamiltonian. This method allows us to prove an exactly tight bound on the speed of QST on a subclass of Hamiltonians experimentally realizable by a fully-connected quantum computer.

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来源期刊

Quantum Science and Technology Materials Science-Materials Science (miscellaneous)

CiteScore

11.20

自引率

3.00%

发文量

133

期刊介绍： Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics. Quantum Science and Technology is a new multidisciplinary, electronic-only journal, devoted to publishing research of the highest quality and impact covering theoretical and experimental advances in the fundamental science and application of all quantum-enabled technologies.