LCD screens use liquid crystals which have a high degree of order, even though they form a fluid. A new theory maps out the interplay between order, temperature and symmetry. Publication in Physical Review X.

This dissertation shows that dialogical logic constitutes a powerful and flexible general framework for the development and study of various logical formalisms and combinations thereof.

This dissertation provides crucial but as yet missing empirical data on the tone accent opposition in the so-called

Organic molecules in interstellar space are important as they influence the structure of galaxies and star formations. Studying catalytic processes in space allows us to understand how molecular species are formed and chemically evolved in the interstellar medium and solar system objects.

Promotor: W.Th.F. den Hollander Co-Promotor: F.M. Spieksma

Promotor: Prof.dr. A. Achucarro, Co-Promotor: J.W. van Holten

Promotor: S.J. Edixhoven

Ten years after its introduction, the controversial idea of Erik Verlinde on gravity is still a hotly debated topic, and is still surrounded by a cloud of scepticism. Scepticism in which the media have played a major role, theoretical physicst Koenraad Schalm says in an article by NWO. ‘The media simply…

In this thesis we study the landscape of gravitational models which modify GR by introducing an additional scalar degree of freedom (d.o.f.) to source Cosmic Acceleration.

Green hydrogen is produced via a process called water electrolysis. During electrolysis water is split into oxygen and hydrogen.

There are a number of problems in philosophy that seem to share a similar possible solution: 'Why do promises and contracts bind?', 'Why ought citizens and judges obey the law?' and 'Can we realize the gains to be made from cooperation?'. All three problems (as well as some others) share a possible…

This thesis contributes to studying primordial cosmology theories and their detectability in future observations.

This thesis is dedicated to the exploration of the primordial dark ages: unknown physics during the earliest stages of the Universe’s expansion that have not yet been directly probed by observations. Cosmic inflation is a burst of exponential expansion of space after the “Big Bang”.

Artin L-functions associated to continuous representations of the absolute Galois group G_K of a global field K capture a lot of information about G_K as well as arithmetic properties of K.

Promotor: A. Doelman, Co-promotores: P.J.A. van Heijster; A. Zagaris

Promotor: F. Arbab, R. De Nicola, Co-Promotor: M. Tribastone

This dissertation focused on computational methods based on first principles calculations using the Density Functional Theory (DFT) framework. Emphasis was laid on affordable methods that can provide a tradeoff between computational expense and accuracy.

Become involved with LUGO! Become part of the team, join forces with fellow committee members in our voluntary committee or take part in our project-based internships! Check this page regularly for open positions.

How do urban residents in Brazil and the Netherlands (The Hague and Leiden) perceive the cultural benefits of urban forests? How are these benefits spatially distributed across cities? How do socio-demographic factors shape these perceptions, and do these differences vary between countries?

Leiden University has participated in two sustainability rankings for universities: the national Sustainabul and international UI Green Metric.

Every summer, Leiden University is the setting of dozens of summer schools in which professionals and students can receive extra training on a specific topic within a short space of time. We took a look at a summer programme on extremism. ‘A recruiter for al-Qaeda said that I could change the world.…

An interdisciplinary cultural analysis of how the Hindustani double migration informs contemporary processes of identification and problematises the juxtaposition of tradition and modernity.

This thesis examines the complexity of legislative decisions within the EU, with a specific focus on the Council of the EU.

Heterogeneous catalysis is one of the fundamental processes of modern life, being common in industrial refinery and hydrogen vehicles, all the way to the living cell. The dissociation of H2 on Cu(111) is an important benchmark system for studying heterogeneous catalysis, with a large and varied amount…

Promotores: P. Stevenhagen, E. Fouvry (Univeriste Paris Saclay)

The Encyclopedia of Global Human Migration provides a complete exploration of the prominent themes, events, and theoretical underpinnings of the movements of human populations from prehistory to the present day.

Promotor: Prof.dr. P. Stevenhagen & Prof.dr. K. Belabas (Univ. de Bordeaux)

In this thesis,

To an algebraic curve C over the complex numbers one can associate a non-negative integer g, the genus, as a measure of its complexity.

In ‘Dimensions of Free Speech’, Devrim Kabasakal Badamchi (Leiden University Institute of Political Science) offers a new theoretical framework for free speech by critically analysing the major justifications for free speech. Kabasakal Badamchi argues for a justification: namely the double-grounded…

Political scientists Huib Pellikaan and Niels van Willigen (Leiden University) use and elaborate on the theoretical insights from game theory in order to understand nuclear security in changing environment. Now that the relations between the US and Russia have deteriorated and smaller nuclear states…

Making public space more sustainable is considered very important in this project. The Humanities Campus will become a pleasant place to spend time, with lots of greenery. Here, people can relax and find coolness on hot summer days.

On November 22 in Arusha, Tanzania, the Council of Ministers of the East African Community (EASC) endorsed the Democratic Republic of Congo (DRC) as its seventh Partner State. This meeting, chaired by Kenya’s EAC Affairs and Regional Development Cabinet Secretary Adan Mohamed, represents one of the…

On November 22 in Arusha, Tanzania, the Council of Ministers of the East African Community (EASC) endorsed the Democratic Republic of Congo (DRC) as its seventh Partner State.

We are the hub in Leiden where students and staff members cooperate to make our University more sustainable!

Professor Edwin Bakker, director of the Centre for Terrorism & Counterterrorism, released his new book “Terrorism and Counterterrorism Studies: Comparing Theory and Practice”, published by Leiden University Press.

Netwerk en projecten duurzaamheid verduurzaming green office en green team

Read here about the Leiden University Green Office, the Green Office movement and meet our team.