157 citations · 393 across the 16 of their papers we have counts for
16 papers
Observation of magnetic quantum phase crossovers in a semiconductor spin ladder
Elizaveta Morozova, Xin Zhang, Utso Bhattacharya +9
Understanding collective phases of strongly correlated quantum magnets relies on theoretically tractable model systems with precise microscopic control. Antiferromagnetic spin ladd…
Site-resolved magnon and triplon dynamics on a programmable quantum dot spin ladder
Pablo Cova Fariña, Daniel Jirovec, Xin Zhang +7
Quasi-particle dynamics in interacting systems in the presence of disorder challenges the notion of internal thermalization, but proves difficult to investigate theoretically for l…
Mitigation of exchange cross-talk in dense quantum dot arrays
Daniel Jirovec, Pablo Cova Fariña, Stefano Reale +7
Coupled spins in semiconductor quantum dots are a versatile platform for quantum computing and simulations of complex many-body phenomena. However, on the path of scale-up, cross-t…
Entropic costs of extracting classical ticks from a quantum clock
Vivek Wadhia, Florian Meier, Federico Fedele +12
We experimentally realize a quantum clock by using a charge sensor to count charges tunneling through a double quantum dot (DQD). Individual tunneling events are used as the clock'…
Rapid optimal work extraction from a quantum-dot information engine
Kushagra Aggarwal, Alberto Rolandi, Yikai Yang +8
The conversion of thermal energy into work is usually more efficient in the slow-driving regime, where the power output is vanishingly small. Efficient work extraction for fast dri…
Exchange anisotropies in microwave-driven singlet-triplet qubits
Jaime Saez-Mollejo, Daniel Jirovec, Yona Schell +7
Hole spin qubits are rapidly emerging as the workhorse of semiconducting quantum processors because of their large spin-orbit interaction, enabling fast all-electric operations at…
Universal control of four singlet-triplet qubits
Xin Zhang, Elizaveta Morozova, Maximilian Rimbach-Russ +9
The coherent control of interacting spins in semiconductor quantum dots is of strong interest for quantum information processing as well as for studying quantum magnetism from the…
Automated long-range compensation of an rf quantum dot sensor
Joseph Hickie, Barnaby van Straaten, Federico Fedele +6
Charge sensing is a sensitive technique for probing quantum devices, of particular importance for spin qubit readout. To achieve good readout sensitivities, the proximity of the ch…
Exciton transport in a germanium quantum dot ladder
T. -K. Hsiao, P. Cova Fariña, S. D. Oosterhout +10
Quantum systems with engineered Hamiltonians can be used as simulators of many-body physics problems to provide insights beyond the capabilities of classical computers. Semiconduct…
All rf-based tuning algorithm for quantum devices using machine learning
Barnaby van Straaten, Federico Fedele, Florian Vigneau +7
Radio-frequency measurements could satisfy DiVincenzo's readout criterion in future large-scale solid-state quantum processors, as they allow for high bandwidths and frequency mult…
Dynamics of hole singlet triplet qubits with large g-factor differences
Daniel Jirovec, Philipp M. Mutter, Andrea Hofmann +8
The spin-orbit interaction is the key element for electrically tunable spin qubits. Here we probe the effect of cubic Rashba spin-orbit interaction on mixing of the spin states by…
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…
Enhancement of Proximity Induced Superconductivity in a Planar Ge Hole Gas
Kushagra Aggarwal, Andrea Hofmann, Daniel Jirovec +9
Hole gases in planar germanium can have high mobilities in combination with strong spin-orbit interaction and electrically tunable g-factors, and are therefore emerging as a promis…
A singlet triplet hole spin qubit in planar Ge
Daniel Jirovec, Andrea Hofmann, Andrea Ballabio +14
Spin qubits are considered to be among the most promising candidates for building a quantum processor. GroupIV hole spin qubits have moved into the focus of interest due to the eas…
Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits
Andrea Hofmann, Daniel Jirovec, Maxim Borovkov +6
We study double quantum dots in a Ge/SiGe heterostructure and test their maturity towards singlet-triplet () qubits. We demonstrate a large range of tunability, from two sin…
30 GHz-voltage controlled oscillator operating at 4 K
Arne Hollmann, Daniel Jirovec, Maciej Kucharski +3
Solid-state qubit manipulation and read-out fidelities are reaching fault-tolerance, but quantum error correction requires millions of physical qubits and thus a scalable quantum c…