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

The overarching goal of this thesis is to set the foundations, but also make the first essential steps towards establishing a comprehensive, mesoscopic, hydrodynamic theory of epithelial tissues. The stage is set by an exhaustive study of topological defects in passive p-atic liquid crystals, singularities…

Promotor: A. Achúcarro, Co-promotor: A. Boyarsky

Constraint multi-objective optimization with a limited budget for function evaluations is challenging. This thesis tackles this problem by proposing new optimization algorithms. These algorithms are applied on holistic ship design problems. This helps naval architects balance objectives like cost, efficiency,…

Carbon dioxide capture and utilization technologies are necessary to create a truly circular economy. The electrochemical reduction of carbon dioxide to formate is an appealing carbon utilization method as it can be performed at room temperature and pressure, it only requires two electrons, and it has…

Promotores: J. Zaanen, A. Parnachev

Promotor: T.H. Oosterkamp

Promotores: T.H.W. Bäck, Y. Tan, Co-promotor: M.T.M. Emmerich

Promotor: J. Zaanen, Co-Promotor: V. Juricic

This PhD thesis concerns the topic of arithmetic geometry. We address three different questions and each of the questions in some way is about counting how big some set is or can be.

In the early universe, the dynamics of the Higgs field can give rise to many interesting phenomena.

In my research, we developed a method to distinguish knots. A knot is a mathematical depiction of the everyday knot that occurs in ropes and cords.

This thesis presents insights from our study of various correlated electron systems with a scanning tunneling microscope (STM). In ordinary metals, electron-electron interactions exist, but get substantially screened due to the sheer number of electrons.

The aim of the research presented in this thesis was to develop new methods forchallenging systems in liquid-state NMR using paramagnetic effects generated by thetwo-armed probe CLaNP-5.

Continuous optimization is never easy: the exact solution is always a luxury demand and the theory of it is not always analytical and elegant.

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…

There are many interpretations of quantum mechanics, and ultimately experiments are needed to verify or falsify these interpretations.

Promotor: Prof.dr. W.T.F. den Hollander

Promotores: G.R. de Snoo, W.T. de Groot, Co-promotor: C.J.M. Musters

Sanne Kellij en collega's hebben 142 artikelen systematisch geëvalueerd, waarbij ze bewijs onderzochten voor drie hypothesen over de relatie tussen slachtofferschap en sociale informatieverwerking.

Welk effect heeft een verwerkingsvoorkeur op de omgang met regels?

Catalysis is of extreme relevance in the production of everyday materials and plays a central role in many aspects of our life.

The redox-conversion reaction of metal-disulfide and metal-thiolate complexes are important, as they may shed light on electron-transfer reactions that often occur in Nature.

Promotor: Bas Edixhoven, Promotor: Qing Liu

Early time-resolved experiments by Frauenfelder on the ensemble of the kinetic rebinding of CO to myoglobin molecules resulted in a stretched exponential relaxa-tion due to a very large spread of the reaction rates of individual molecules.

Promotores: Bas Edixhoven, Guy Henniart

Vast, often populated, areas in dryland ecosystems face the dangers of desertification.

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

Promotor: S.M. Verduyn Lunel

Of all the mass in our Universe, 80% is thought to consist of a hypothetical and invisible substance called dark matter (DM).

This dissertation consists of two parts, each of which considers a different research area related to random interval maps. In the first part we are interested in random interval maps that are critically intermittent.

This dissertation presents new cryptographic protocols, which can be divided into two families.

Recentelijk is een Special Issue van de European Journal of Criminology verschenen, die is samengesteld door Marieke Liem, Universitair Docent Criminologie bij het Instituut voor Strafrecht & Criminologie, en William Pridemore.

Why do black holes emit thermal radiation? And how does a closed quantum system thermalize?

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

The key characteristic of active matter is the motion of an emergent collection (such as a flock of birds), which is driven by the consumption of energy by its active components (i.e. individual birds).

Enkele keren per jaar organiseert het Europa Instituut een ‘Meet the Author’ bijeenkomst. In het kader van deze nieuwe lezingenreeks komen externe academici naar Leiden om te spreken over een recente publicatie. ‘Meet the Author’ bijeenkomsten vangen aan met een gesprek tussen een lid van het Europa…

Wil je een volledige academische opleiding? Dan ga je na je bachelor door met een masteropleiding. Met een masterdiploma op zak heb je meer kans op een baan op academisch niveau. Na afronding krijg je de titel Master of Arts (MA).

Ontdek de inhoud van de éénjarige MSc Nederlandse Politiek aan Universiteit Leiden: kernvakken, keuzevakken, scriptie en analytische vaardigheden binnen kleinschalig onderwijs.

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.

Alles wat jij moet weten over de minor Theater, film en tv-series op een rijtje.

Na het afronden van de bacheloropleiding volgen verreweg de meeste studenten de masteropleiding.

Organisms often need to adapt more efficiently and devise new strategies for surviving difficult ecological circumstances.

Promotor: Prof.dr. M.L. van Heck, Co-Promotor: B.P. Tighe

Ontdek de voorlichtingsactiviteiten rond de MSc Democracy and Representation aan Universiteit Leiden: online open dagen, Q&A-sessies en virtuele rondleidingen.

Gibbs measures, as used in Statistical Mechanics, have a definition that is remarkably similar to the definition ofg-measures, used in dynamical systems.

Promotor: S.M. Verduyn Lunel, Co-promotores: M.F.E. de Jeu, B. de Pagter

Lees meer over de MSc International Politics aan Universiteit Leiden: programma-opbouw, kernvakken, thesis-seminar en kleinschalige begeleiding in Den Haag.

Lees meer over de informatieve activiteiten voor de MSc Nationalism, Ethnic Conflict and Development aan Universiteit Leiden – zoals webinars, online open dagen, virtuele rondleidingen en Master Talks-video’s.

Lees meer over voorlichtingsactiviteiten voor de MSc International Organisation aan Universiteit Leiden, zoals webinars, virtuele sessies en Q&A’s over de aanmelding.