Promotor: Prof.dr. D. Bouwmeester, Co-Promotor: M.J.A. de Dood

This thesis investigates the contribution of quantum computers to machine learning, a field called Quantum Machine Learning. Quantum Machine Learning promises innovative perspectives and methods for solving complex problems in machine learning, leveraging the unique capabilities of quantum computers…

Quantum computers are a proposed fundamentally new type of computer. They aim to perform some computations much faster than previously possible by exploiting phenomena at the quantum scale, called superposition and entanglement.

This thesis examines silicon pore optics (SPO), a technology that exploits silicon wafers from the semiconductor industry to create extremely high quality X-ray optics, by studying its manufacturing process, applications, and prospects.

Promotor: Prof.dr. C.W.J. Beenakker

We find ourselves in an era of transition, not just towards a more computing- and data-driven society but also away from unsustainable fossil fuels as an energy source.

Quantummechanica voor iedereen

This thesis investigates how quantum, quantum-inspired, and hybrid quantum-classical computation can enhance key points of the automated machine learning (AutoML) pipeline under the constraints of noisy intermediate-scale quantum (NISQ) devices.

Quantum, machine learning, AI en qubits. Quantum Leiden bundelt onderzoek en onderwijs van Universiteit Leiden naar supercomputers of quantumcomputers

This thesis advances automata learning, a key area in computer science, with applications in software verification, biological analysis, and autonomous technologies. It explores three main themes: first, it introduces a passive learning algorithm for generating compact probabilistic models from positive…

Promotor: Prof.dr.ir. J.W.M. Hilgenkamp, Prof.dr. J. van den Brink

Bacteria are highly complex and diverse organisms that have adapted to survive in ecological niches ranging from the most extreme to the most heterogeneous environments.

Promotor: Prof.dr. G.P. van Wezel

With the help of quantum mechanics, digital quantum hardware may be able to tackle some of the problems that are too difficult for ordinary computers. But despite these expectations and the ongoing effort of the research community, reliable quantum computers are not yet realized in a lab setting.

Actinobacteria are Gram-positive bacteria that have a complex multicellular life cycle and are well known for their ability to produce a wide range of bioactive natural products (NPs).

In this dissertation, we work towards an experiment in which we aim to bring a micrometer sized magnet at the tip of a soft cantilever into a superposition.

Surface acoustic waves (SAWs) are mechanical waves that travel along the surface of a material and find many applications in modern technologies due to the ease of excitation on piezoelectric substrates via interdigital transducers (IDTs).

Ice, the solid state of water, plays an important role on our planet as well as the entire universe.Despite the fact that an individual water molecule has a very simple structure, its chemical bonding in the solid phase can be surprisingly complex.

Promotores: Prof.dr. C.A.M.J.J. van den Hondel, Prof.dr. V. Meyer (Technische Universität Berlin)

Hoe bereiden we ons voor op de impact van nieuwe technologie die onze systemen krachtiger en sneller dan ooit kan maken? Tijdens de Quantum & Law Conference, benadrukten experts dat quantumtechnologie nieuwe juridische en ethische vraagstukken oproept.

Hydrogen-based fuels are regarded as promising candidates for decarbonizing the maritime shipping sector.

The idea of citizens and public professionals collaborating to provide public services has widely spread in several countries around the globe. Co-production is often presented as the go-to solution for challenges like a legitimacy crisis of both the government and the market, and financial concerns.…

Promotie

Factors affecting galanthamine production in Narcissus

In cryptography, generic transformations are often used to strengthen simpler but weaker schemes, into more sophisticated and stronger ones.

This thesis considers multi-prover commitment schemes whose security is based on restrictions on the communication between the provers.

Filamentous Actinobacteria, such as Streptomyces, produce a plethora of chemically diverse bioactive metabolites that have found applications across medicine, agriculture and biotechnology.

Quantum critical metals at vanishing fermion flavor number.

This thesis examines the impacts and challenges of water use of electric power system. This thesis found that there are large differences in water use of electricity technologies, with hydropower and thermal power being two large water users.

Promotores: Prof.dr. D. Bouwmeester, Prof.dr. A. Fiore (TU Eindhoven)

In this work we describe three methods to improve the performance of Quantum Field Theory calculations.

Kunnen we bewijzen of een groot quantumsysteem zich echt gedraagt volgens de vreemde regels van de quantummechanica – of alleen maar doet alsof? Een team van natuurkundigen van de Universiteit Leiden en uit China vond in een baanbrekende studie het antwoord op deze vraag.

Streptomyces bacteria are a valuable source of natural products, many of which are used in the clinic or in biotechnology.

The Copenhagen interpretation of quantum mechanics states that a measurement collapses a wavefunction onto an eigenstate of the corresponding measurement operator.

Promotor: E.R. Eliel, Co-Promotor: M.J.A. de Dood

The elementary excitations of magnets are called spin waves, and their corresponding quasi-particles are known as magnons. The rapidly growing field of Magnonics aims at using them as information carriers in a new generation of electronic devices, (almost) free of electric currents.

Promotor: Prof.dr. B. van de Water, Co-promotores: L.T.M. van der Ven, A.S. Kienhuis

Wetenschapsjournalist Anna Gimbrère en natuurkundige Julia Cramer openen op woensdag 17 december de Quantum Escape Room in Eindhoven. Leidse onderzoekers werkten nauw samen met de ontwerpers om de escaperoom niet alleen spannend, maar ook écht quantum te maken.

In het Leids Universitaire weekblad “Mare” is onlangs een interview verschenen met de Leidse statisticus prof. dr. Richard Gill over zijn bijdrage aan het Delftse quantum-experiment.

EASQC brengt hoogopgeleide en gemotiveerde academische deskundigen en industriële eindgebruikers samen, die samenwerken aan zeer relevante en representatieve Quantum Computing-toepassingen, en hun lessen zullen delen met hun communities. Om de samenwerking tussen de industrie en de academische wereld…

Wat is quantum nou eigenlijk? Tja, probeer dat maar eens in begrijpelijke taal uit te leggen. In diverse regionale kranten doet wiskundige Peter Bruin een poging. ‘Om quantum te begrijpen, moet je tegen je intuïtie in denken. Daar is ons brein niet voor gemaakt.’

Spectroscopic studies on fluorescent single molecules in organic condensed matter does not only provide information about the molecule itself, but also its near environment. By suppression of phonon-induced broadening of spectral lines through cooling to low temperatures, small changes in the spectral…

Promotores: G.A. Persoon, H.H. de Iongh

Quantumtechnologie heeft de potentie om de samenleving ingrijpend te veranderen. Maar hoe kun je burgers effectief informeren over technologie en wetenschap die zo ingewikkeld en raadselachtig is? Promovendus Aletta Meinsma deed er onderzoek naar.

Zijn quantumcomputers de wetenschappelijke doorbraak van onze tijd? In deze podcast geeft natuurkundeprofessor Carlo Beenakker uitleg over quantumtechnologie.

Recent is het Oostenrijkse natuurkundigen gelukt om miniscule metalen bolletjes met een doorsnee van 0,000008 millimeter in superpositie te brengen.