Work

Coherent Control of an Exfoliated NbSe$_2$ Homojunction Qubit in a Three-Dimensional Cavity

Year: 2026

Type: article

Abstract: Functionalizing quantum devices to extend their range of applications is an extremely active area of research. One of the most promising approaches is to replace aluminum with functional materials. Within this context, van der Waals (vdW) superconductors are ideal candidates because they could enable the integration of their unique properties into qubits. In this work, we present a qubit whose Josephson junction is fabricated from exfoliated NbSe2 using a lithography-free process. Our device exhibits a relaxation time T1 = 275 ±7 ns as well as coherence times T*2 = 136 ± 31 ns and T Echo2 = 203 ± 16 ns. Our work demonstrates the feasibility of integrating vdW superconductors into quantum technologies and represents a first step toward applying quantum non-demolition photon-detection protocols to the challenging field of dark matter searches.

Source: Superconductor Science and Technology

DOI: 10.1088/1361-6668/aeb986

Authors: Alessandro D'Elia, alex Komnang Piedjou, Andrea Giachero, Carlo Ligi, Francesco Mattioli, Alessio Rettaroli, Javid Rezvani, Claudio Gatti, F. Chiarello, Daniele Di Gioacchino, Giovanni Maccarrone, Cristian Pira, Simone Tocci

Institutions: Istituto Nazionale di Fisica Nucleare, University of Milano-Bicocca, Università di Camerino, National Research Council, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,325

OpenAlex ID: W7223648986

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