Work

Efficient control of fluxonium qubits via nonadiabatic transitions

Year: 2025

Type: article

Abstract: The fluxonium qubit is a promising platform for quantum operations due to its large anharmonicity and long coherence time. However, conventional resonant driving methods often require long operation times and complex implementation. As an alternative, nonadiabatic transitions induced by a time-dependent external flux ϕ ext ( t ) can enable faster and simpler control by exploiting quantum interference between multiple transition paths. Existing approaches typically impose periodicity or symmetry on ϕ ext ( t ) , which can limit control efficiency. We propose a design strategy for ϕ ext ( t ) that relaxes these constraints. We demonstrate the effectiveness of this approach in two key scenarios: population inversion and adiabatic passage. Numerical simulations show that our method achieves higher control efficiency than existing schemes, emphasizing the advantage of breaking periodicity and symmetry. Furthermore, by incorporating decoherence effects using the Lindblad master equation, we confirm that the proposed scheme remains robust under realistic conditions.

Source: Physical Review Research

DOI: 10.1103/4s4k-rf6x

Authors: I-Yun Hsiao, Yen-Hsiang Lin, Yoshiaki Teranishi

Institutions: National Center for Theoretical Sciences, National Center for Theoretical Sciences, Physics Division, National Tsing Hua University, Taiwan Semiconductor Manufacturing Company (Taiwan), National Yang Ming Chiao Tung University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funders: National Science and Technology Council, National Science and Technology Council