261 citations · 1.5k across the 30 of their papers we have counts for
30 papers
In-situ control of hole-spin driving mechanisms
Simon Geyer, Rafael S. Eggli, Carlos dos Santos +6
Hole-spin qubits enable fast, all-electrical spin manipulation through electric-dipole spin resonance (EDSR), arising from two microscopic mechanisms rooted in their intrinsically…
A direct dispersive signature of Pauli spin blockade
Simon Svab, Rafael S. Eggli, Taras Patlatiuk +7
Pauli Spin Blockade (PSB) is a key paradigm in semiconductor nanostructures and gives access to the spin physics. We report the direct observation of PSB with gate-dispersive refle…
All-electrical operation of a spin qubit coupled to a high-Q resonator
Rafael S. Eggli, Taras Patlatiuk, Eoin G. Kelly +5
Building a practical quantum processor involves integrating millions of physical qubits along with the necessary components for individual qubit manipulation and readout. Arrays of…
Capacitive crosstalk in gate-based dispersive sensing of spin qubits
Eoin G. Kelly, Alexei Orekhov, Nico Hendrickx +8
In gate-based dispersive sensing, the response of a resonator attached to a quantum dot gate is detected by a reflected radio-frequency signal. This enables fast readout of spin qu…
A Generalizable TCAD Framework for Silicon FinFET Spin Qubit Devices with Electrical Control
Qian Ding, Andreas V. Kuhlmann, Andreas Fuhrer +1
We present a TCAD-based simulation framework established for quantum dot spin qubits in a silicon FinFET platform with all-electrical control of the spin state. The framework works…
Phase driving hole spin qubits
Stefano Bosco, Simon Geyer, Leon C. Camenzind +7
The spin-orbit interaction in spin qubits enables spin-flip transitions, resulting in Rabi oscillations when an external microwave field is resonant with the qubit frequency. Here,…
Cryogenic hyperabrupt strontium titanate varactors for sensitive reflectometry of quantum dots
Rafael S. Eggli, Simon Svab, Taras Patlatiuk +8
Radio frequency reflectometry techniques enable high bandwidth readout of semiconductor quantum dots. Careful impedance matching of the resonant circuit is required to achieve high…
A compact and versatile cryogenic probe station for quantum device testing
Mathieu de Kruijf, Simon Geyer, Toni Berger +4
Fast feedback from cryogenic electrical characterization measurements is key for the development of scalable quantum computing technology. At room temperature, high-throughput devi…
Two-qubit logic with anisotropic exchange in a fin field-effect transistor
Simon Geyer, Bence Hetényi, Stefano Bosco +7
Semiconductor spin qubits offer a unique opportunity for scalable quantum computation by leveraging classical transistor technology. Hole spin qubits benefit from fast all-electric…
Identifying Pauli spin blockade using deep learning
Jonas Schuff, Dominic T. Lennon, Simon Geyer +9
Pauli spin blockade (PSB) can be employed as a great resource for spin qubit initialisation and readout even at elevated temperatures but it can be difficult to identify. We presen…
Cross-architecture Tuning of Silicon and SiGe-based Quantum Devices Using Machine Learning
B. Severin, D. T. Lennon, L. C. Camenzind +20
The potential of Si and SiGe-based devices for the scaling of quantum circuits is tainted by device variability. Each device needs to be tuned to operation conditions. We give a ke…
A hole spin qubit in a fin field-effect transistor above 4 kelvin
Leon C. Camenzind, Simon Geyer, Andreas Fuhrer +3
The greatest challenge in quantum computing is achieving scalability. Classical computing previously faced a scalability issue, solved with silicon chips hosting billions of fin fi…
Silicon quantum dot devices with a self-aligned second gate layer
Simon Geyer, Leon C. Camenzind, Lukas Czornomaz +5
We implement silicon quantum dot devices with two layers of gate electrodes using a self-alignment technique, which allows for ultra-small gate lengths and intrinsically perfect la…
Ambipolar quantum dots in undoped silicon fin field-effect transistors
Andreas V. Kuhlmann, Veeresh Deshpande, Leon C. Camenzind +2
We integrate ambipolar quantum dots in silicon fin field-effect transistors using exclusively standard complementary metal-oxide-semiconductor fabrication techniques. We realize am…
Narrow optical linewidths and spin pumping on charge-tunable, close-to-surface self-assembled quantum dots in an ultra-thin diode
Matthias C. Löbl, Immo Söllner, Alisa Javadi +9
We demonstrate full charge control, narrow optical linewidths, and optical spin pumping on single self-assembled InGaAs quantum dots embedded in a thin diode str…
Optical nanoscopy via quantum control
Timo Kaldewey, Andreas V. Kuhlmann, Sascha R. Valentin +3
We present a scheme for nanoscopic imaging of a quantum mechanical two-level system using an optical probe in the far-field. Existing super-resolution schemes require more than two…
Indistinguishable and efficient single photons from a quantum dot in a planar nanobeam waveguide
Gabija Kiršanskė, Henri Thyrrestrup, Raphaël S. Daveau +16
We demonstrate a high-purity source of indistinguishable single photons using a quantum dot embedded in a nanophotonic waveguide. The source features a near-unity internal coupling…
Coherent and robust high-fidelity generation of a biexciton in a quantum dot by rapid adiabatic passage
Timo Kaldewey, Sebastian Lüker, Andreas V. Kuhlmann +6
A biexciton in a semiconductor quantum dot is a source of polarization-entangled photons with high potential for implementation in scalable systems. Several approaches for non-reso…
Demonstrating the decoupling regime of the electron-phonon interaction in a quantum dot using chirped optical excitation
Timo Kaldewey, Sebastian Lüker, Andreas V. Kuhlmann +7
Excitation of a semiconductor quantum dot with a chirped laser pulse allows excitons to be created by rapid adiabatic passage. In quantum dots this process can be greatly hindered…
Resonant driving of a single photon emitter embedded in a mechanical oscillator
Mathieu Munsch, Andreas V. Kuhlmann, Davide Cadeddu +4
Coupling a microscopic mechanical resonator to a nano-scale quantum system enables control of the mechanical resonator via the quantum system, and vice versa. The coupling is usual…
An artificial Rb atom in a semiconductor with lifetime-limited linewidth
Jan-Philipp Jahn, Mathieu Munsch, Lucas Béguin +10
We report results important for the creation of a best-of-both-worlds quantum hybrid system consisting of a solid-state source of single photons and an atomic ensemble as quantum m…
Epitaxial lift-off for solid-state cavity quantum electrodynamics
Lukas Greuter, Daniel Najer, Andreas V. Kuhlmann +5
We present a new approach to incorporate self-assembled quantum dots into a Fabry-Pérot-like microcavity. Thereby a 3/4 GaAs layer containing quantum dots is epitaxially removed…
Towards high cooperativity strong coupling of a quantum dot in a tunable microcavity
Lukas Greuter, Sebastian Starosielec, Andreas V. Kuhlmann +1
We investigate the strong coupling regime of a self-assembled quantum dot in a tunable microcavity with dark-field laser spectroscopy. The high quality of the spectra allows the li…
Electrically-tunable hole g-factor of an optically-active quantum dot for fast spin rotations
Jonathan H. Prechtel, Franziska Maier, Julien Houel +5
We report a large g-factor tunability of a single hole spin in an InGaAs quantum dot via an electric field. The magnetic field lies in the in-plane direction x, the direction requi…