Lukas Theis
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View article: Hydrophilic Modification of Dialysis Membranes Sustains Middle Molecule Removal and Filtration Characteristics
Hydrophilic Modification of Dialysis Membranes Sustains Middle Molecule Removal and Filtration Characteristics Open
While efficient removal of uremic toxins and accumulated water is pivotal for the well-being of dialysis patients, protein adsorption to the dialyzer membrane reduces the performance of a dialyzer. Hydrophilic membrane modification with po…
View article: Additively Manufactured Zirconia for Dental Applications with <i>In Situ</i> Color Gradation Control
Additively Manufactured Zirconia for Dental Applications with <i>In Situ</i> Color Gradation Control Open
The current process for creating zirconia reconstructions for teeth is time-consuming, expensive, and results in tool wear and raw material waste. An alternative method, near-net shape additive manufacturing capable of producing samples wi…
View article: Hemodiafiltration: Technical and Medical Insights
Hemodiafiltration: Technical and Medical Insights Open
Despite the significant medical and technical improvements in the field of dialytic renal replacement modalities, morbidity and mortality are excessively high among patients with end-stage kidney disease, and most interventional studies yi…
View article: Digital orientation and environmental performance in times of technological change
Digital orientation and environmental performance in times of technological change Open
Digitalization is increasingly seen as a strategic means for firms to yield competitive and environmental advantages. Still, current empirical research does not yet provide ample evidence on how a firm's strategic posture towards digitaliz…
View article: Gap-independent cooling and hybrid quantum-classical annealing
Gap-independent cooling and hybrid quantum-classical annealing Open
In this letter we present an efficient gap-independent cooling scheme for a quantum annealer that benefits from finite temperatures. We choose a system based on superconducting flux qubits as a prominent example of current quantum annealin…
View article: Enhancing the performance of quantum computers
Enhancing the performance of quantum computers Open
Recent progress in quantum information technology suggests that we will soon be able to carry out computational tasks that are intractable on classical computers. In the common quantum circuit model that divides the underlying quantum algo…
View article: Nonadiabatic corrections to fast dispersive multiqubit gates involving<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Z</mml:mi></mml:math>control
Nonadiabatic corrections to fast dispersive multiqubit gates involvingcontrol Open
We review a time-dependent version of the Schrieffer-Wolff transformation\nthat accounts for real-time control of system parameters, soon to be rendered\npossible on a broad basis due to technical progress. The dispersive regime of\n$N$ mu…
View article: An accurate model for fast dispersive multi-qubit gates involving $Z$-control
An accurate model for fast dispersive multi-qubit gates involving $Z$-control Open
We review a time-dependent version of the Schrieffer-Wolff transformation that accounts for real-time control of system parameters, soon to be rendered possible on a broad basis due to technical progress. The dispersive regime of $N$ multi…
View article: High-fidelity Rydberg-blockade entangling gate using shaped, analytic pulses
High-fidelity Rydberg-blockade entangling gate using shaped, analytic pulses Open
We show that the use of shaped pulses improves the fidelity of a Rydberg\nblockade two-qubit entangling gate by several orders of magnitude compared to\nprevious protocols based on square pulses or optimal control pulses. Using\nanalytical…
View article: Simultaneous gates in frequency-crowded multilevel systems using fast, robust, analytic control shapes
Simultaneous gates in frequency-crowded multilevel systems using fast, robust, analytic control shapes Open
We present a few-parameter ansatz for pulses to implement a broad set of\nsimultaneous single-qubit rotations in frequency-crowded multilevel systems.\nSpecifically, we consider a system of two qutrits whose working and leakage\ntransition…
View article: Engineering adiabaticity at an avoided crossing with optimal control
Engineering adiabaticity at an avoided crossing with optimal control Open
We investigate ways to optimize adiabaticity and diabaticity in the Landau-Zener model with non-uniform sweeps. We show how diabaticity can be engineered with a pulse consisting of a linear sweep augmented by an oscillating term. We show t…