Work

Andreev spin qubits based on the helical edge states of magnetically doped two-dimensional topological insulators

Year: 2026

Type: article

Abstract: We show that Andreev spin qubits can be realized in a Josephson junction based on the helical edge states of a two-dimensional topological insulator (quantum spin Hall system) proximized by superconducting films, in the presence of magnetic doping. We demonstrate that the electric dipole transitions between the Andreev spin states induced by the magnetic doping can be harnessed to manipulate the Andreev spin qubit by microwave radiation pulses, without applying an external Zeeman field or invoking ancillary states. We numerically simulate the realization of and Hadamard quantum logic gates, and discuss implementations in realistic setups.

Source: Physical Review Research

DOI: 10.1103/jwtl-dz3v

Authors: Edoardo Latini, Fausto Rossi, Fabrizio Dolcini

Institution: Politecnico di Torino

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funder: NextGenerationEU