A gate tunable transmon qubit in planar Ge

O Sagi, A Crippa, M Valentini, M Janik… - Nature …, 2024 - nature.com
Gate-tunable transmons (gatemons) employing semiconductor Josephson junctions have
recently emerged as building blocks for hybrid quantum circuits. In this study, we present a …

Phase-engineering the Andreev band structure of a three-terminal Josephson junction

M Coraiola, DZ Haxell, D Sabonis, H Weisbrich… - Nature …, 2023 - nature.com
In hybrid Josephson junctions with three or more superconducting terminals coupled to a
semiconducting region, Andreev bound states may form unconventional energy band …

Minimal Kitaev-transmon qubit based on double quantum dots

DM Pino, RS Souto, R Aguado - Physical Review B, 2024 - APS
Minimal Kitaev chains composed of two semiconducting quantum dots coupled via a
superconductor have emerged as a promising platform to realize and study Majorana bound …

Spectroscopy of spin-split Andreev levels in a quantum dot with superconducting leads

A Bargerbos, M Pita-Vidal, R Žitko, LJ Splitthoff… - Physical review …, 2023 - APS
We use a hybrid superconductor-semiconductor transmon device to perform spectroscopy of
a quantum dot Josephson junction tuned to be in a spin-1/2 ground state with an unpaired …

Direct Microwave Spectroscopy of Andreev Bound States in Planar Josephson Junctions

M Hinderling, SC Ten Kate, M Coraiola, DZ Haxell… - PRX Quantum, 2024 - APS
We demonstrate microwave measurements of the Andreev-bound-state (ABS) spectrum in
planar Josephson junctions (JJs) defined in Ge high-mobility two-dimensional hole gases …

Hybrid quantum systems with artificial atoms in solid state

C Chia, D Huang, V Leong, JF Kong… - Advanced Quantum …, 2024 - Wiley Online Library
The development of single‐platform qubits, predominant for most of the last few decades,
has driven the progress of quantum information technologies but also highlighted the …

Subgap states in semiconductor-superconductor devices for quantum technologies: Andreev qubits and minimal Majorana chains

R Seoane Souto, R Aguado - New Trends and Platforms for Quantum …, 2024 - Springer
In recent years, experimental advances have made it possible to achieve an unprecedented
degree of control over the properties of subgap bound states in hybrid nanoscale …

Blueprint for All-to-All-Connected Superconducting Spin Qubits

M Pita-Vidal, JJ Wesdorp, CK Andersen - PRX Quantum, 2025 - APS
Andreev (or superconducting) spin qubits (ASQs) have recently emerged as a promising
qubit platform that combines superconducting circuits with semiconductor spin degrees of …

Microwave susceptibility observation of interacting many-body Andreev states

V Fatemi, PD Kurilovich, M Hays, D Bouman… - Physical review …, 2022 - APS
Electrostatic charging affects the many-body spectrum of Andreev states, yet its influence on
their microwave properties has not been elucidated. We developed a circuit quantum …

Flux-tunable Kitaev chain in a quantum dot array

JD Torres Luna, AM Bozkurt, M Wimmer, CX Liu - SciPost Physics Core, 2024 - scipost.org
Connecting quantum dots through Andreev bound states in a semiconductor-
superconductor hybrid provides a platform to create a Kitaev chain. Interestingly, in a double …