Work

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

Year: 2023

Type: article

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.

Source: Quantum Science and Technology

DOI: 10.1088/2058-9565/ad0770

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

Institutions: Colorado School of Mines, National Institute of Standards and Technology

Language: English

Topic: Quantum Computing Algorithms and Architecture

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,690

Funders: National Science Foundation, W. M. Keck Foundation, Division of Computing and Communication Foundations