Work

Implementation of controlled unitary gates and its application in a remote-controlled quantum gate

Year: 2024

Type: article

Abstract: Recently, remote-controlled quantum information processing has been proposed for its applications in secure quantum processing protocols and distributed quantum networks. For remote-controlled quantum gates, the experimental realization of controlled unitary (CU) gates between any quantum gates is an essential task. Here, we propose and experimentally demonstrate a scheme for implementing CU gates between any pair of unitary gates using the polarization and time-bin degrees of freedom of single photons. Then, we experimentally implement remote-controlled single-qubit unitary gates by controlling either the state preparation or measurement of the control qubit with high process fidelities. We believe the proposed remote-controlled quantum gate model can pave the way for secure and efficient quantum information processing.

Source: Optics Express

DOI: 10.1364/oe.540199

Authors: Byungjoo Kim, Seongjin Hong, Yong-Su Kim, Kyunghwan Oh, Hyang-Tag Lim

Institutions: Yonsei University, Korea Institute of Machinery & Materials, Chung-Ang University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Korea Institute of Science and Technology, National Research Foundation of Korea, National Research Council of Science and Technology, Institute for Information and Communications Technology Promotion