CV
Education
01/09/2018 — 27/06/2022
PhD in Condensed Matter Physics
Université Grenoble Alpes (France)
⟩ PhD thesis: “Surface acoustic waves as testbed for electron flying qubits” — Best thesis award
⟩ European excellence grant: Marie Skłodowska-Curie Fellowship (No. 754303)
01/09/2016 — 31/08/2018
MSc in Materials Engineering
Universidad Politécnica de Madrid (Spain)
⟩ Master thesis: “Surface acoustic wave engineering for single-electron transport”
⟩ Graduate with honor — Rank 1 / 11 graduates — GPA 9.37 / 10
01/09/2012 — 31/08/2016
BSc in Nanoscience and Nanotechnology
Universtat Autònoma de Barcelona (Spain)
⟩ Bachelor thesis: “Synthesis and characterization of TiO2 nano fluids as electroactive materials for energy storage in flow cells”
⟩ Graduate with honor — Rank 2 / 61 graduates — GPA 8.80 / 10
Work experience
01/05/2023 — present
Research scientist
Silicon Quantum Computing (Sydney, Australia)
⟩ Automatize the characterization workflow of single-donor quantum devices
⟩ Explore novel qubit architectures for a scalable quantum computer
⟩ Identify bottlenecks and provide first-hand feedbacks to software, hardware and cleanroom experts
01/11/2017 — 30/04/2023
Researcher in Condensed Matter Physics
Institut Néel CNRS (Grenoble, France)
⟩ Demonstrated two-electron quantum interference at a single-particle level: an essential building block for electron flying qubits
⟩ Developed the first pulse compression technique for acoustic phonons (GHz range)
⟩ Increased nanofabrication yield above 90% of semiconductor GaAs nanodevices (30 nm patterns) in clean room facilities
⟩ Integrated Arbitrary Waveform Generators (20 GHz bandwidth) to a real-time acquisition setup (FPGA, DAC, ADC) with picosecond synchronization
⟩ Developed Python-based drivers for AWGs (Tektronix and Keysight), sourcemeters (Keithley) and real-time/sampling oscilloscopes (LeCroy)
⟩ Upgraded a cryogenic dilution refrigerator (20 mK) for highly reliable electrical stability during thermal cycling
⟩ CAD nanocircuit design automatization (GDSII + Python)
⟩ Organized monthly scientific seminars for a broad audience
06/10/2020 — 06/12/2020
Visiting researcher
nextnano GmbH (Munich, Germany)
⟩ Created the project nextnanopy: an open-source and user-friendly Python package to interface the company’s simulation software
⟩ Developed a quantitative 3D electrostatic model for GaAs heterostructure
⟩ Benchmarked the model with 110 nanodevices
01/06/2017 — 31/08/2017
Research intern
IMDEA Materiales (Madrid, Spain)
⟩ Internship report: “GPU-accelerated conjugate gradient for variational approach in computational homogenization”
⟩ Awarded with “Research initiation fellowship” grant
⟩ GPU programming with Python (PyCUDA), resulting in a 3x faster conjugate gradient algorithm
01/05/2016 — 06/07/2016
Research intern
Universtät zu Köln — COPT (Cologne, Germany)
⟩ Internship report: “Investigations on the influence of NIR laser treatment on P3HT:PCBM films”
⟩ Investigation of organic solar cell surface treatments with high-power laser
⟩ Fabrication in a glovebox environment
⟩ Characterization with AFM, UV-VIS spectrometer and X-ray diffraction
Publications
Electron qubits surfing on acoustic waves: review of recent progress
J.W. et al., Journal of Physics D: Applied Physics (2024)
On-demand single-electron source via single-cycle acoustic pulses
S.O., J.W. et al., Physical Review Applied (2024)
Coulomb-mediated antibunching of an electron pair surfing on sound
J.W. et al., Nature Nanotechnology (2023) — Highlight in Nature News & Views
Generation of a single-cycle acoustic pulse: A scalable solution for transport in single-electron circuits
J.W., S.O., H.E. et al., Physical Review X 12, 031035 (2022) — Highlight in Physics
Semiconductor-based electron flying qubits: Review on recent progress accelerated by numerical modelling
H.E., J.W. et al., EPJ Quantum Technology 9, 21 (2022)
Unveiling the charge distribution of a GaAs-based nanoelectronic device: A large experimental data-set approach
E.C., J.W. et al., Physical Review Research 4, 043163 (2022)
In-flight distribution of an electron within a surface acoustic wave
H.E., J.W. et al., Applied Physics Letters 119, 114004 (2021) — Editor’s pick
Sound-driven single-electron transfer in a circuit of coupled quantum rails
S.T., H.E., H.L., J.W. et al., Nature Communications 10, 4557 (2019)
Conferences
Languages
Open-source projects
nextnanopy — a Python package to interface the nextnano software
idtpy — a Python package for the design of interdigital transducers for SAW devices
pystruments — a Python package for instrument drivers
qube — a Python package built on top of QCoDeS with additional user-friendly features