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

被引：0

作者：

Jameson, Casey ^{[1
]}

Basyildiz, Bora ^{[2
]}

Moore, Daniel ^{[1
]}

Clark, Kyle ^{[1
]}

Gong, Zhexuan ^{[1
,3
]}

机构：

[1] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA

[2] Colorado Sch Mines, Dept Comp Sci, Golden, CO 80401 USA

[3] NIST, Boulder, CO 80305 USA

来源：

QUANTUM SCIENCE AND TECHNOLOGY | 2024年 / 9卷 / 01期

关键词：

quantum optimal control; quantum speed limits; quantum state transfer; Lieb-Robinson bounds; long-range interactions; PROPAGATION; INFORMATION; SPEED;

D O I：

10.1088/2058-9565/ad0770

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：17

共 55 条

[1]

[Anonymous], 2014, PHYS REV A, DOI [DOI 10.1007/978-3-642-74626-0_8, DOI 10.1103/PhysRevA.90.022307]

[2] Introduction to the Pontryagin Maximum Principle for Quantum Optimal Control [J].