ArticleNature communications2024
A gate tunable transmon qubit in planar Ge.
Article in Nature communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Atomically Resolved Electron Reflectivity at a Metal/Semiconductor Interface.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- High-quality and field resilient microwave resonators on Ge quantum well heterostructures.NPJ quantum information · 2026Article
- Strongly anharmonic flux-tunable transmon based on InAs-Al 2D heterostructure.Nature communications · 2025Article
- Impact of Surface Treatments on the Transport Properties of Germanium 2DHGs.ACS applied electronic materials · 2025Article
- The carbon nanotube gatemon qubit.Nature communications · 2025Article
- Gate- and flux-tunable sin(2φ) Josephson element with planar-Ge junctions.Nature communications · 2025Article
- A gate tunable transmon qubit in planar Ge.Nature communications · 2024Article
Corrections and comments
- Erratum issued
Authors and funding
13 authors.
Funding
Abstract
Gate-tunable transmons (gatemons) employing semiconductor Josephson junctions have recently emerged as building blocks for hybrid quantum circuits. In this study, we present a gatemon fabricated in planar Germanium. We induce superconductivity in a two-dimensional hole gas by evaporating aluminum atop a thin spacer, which separates the superconductor from the Ge quantum well. The Josephson junction is then integrated into an Xmon circuit and capacitively coupled to a transmission line resonator. We showcase the qubit tunability in a broad frequency range with resonator and two-tone spectroscopy. Time-domain characterizations reveal energy relaxation and coherence times up to 75 ns. Our results, combined with the recent advances in the spin qubit field, pave the way towards novel hybrid and protected qubits in a group IV, CMOS-compatible material.
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Registered trials
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