Lecture

String theory has come under fire in recent years. Promises have been made that have not been lived up to. Leiden theoretical physicists have now for the first time used string theory to describe a physical phenomenon. Their discovery has been reported this week in 'Science'.

My research focuses on theories of the sublime by the Berlin Enlightenment philosophers Moses Mendelssohn (1729–86) and Johann Georg Sulzer (1720–79).

On 19 December 2019, Reza Eftekhar defended his thesis 'The Role of the Domestic Law of the Host State in Determining the ratione materiae Jurisdiction of Investment Treaty Tribunals: The Partial Revival of the Localisation Theory'. The doctoral research was supervised by Prof. E. de Brabandere.

Do you often feel drained after a day at the office? The new SPS Monitor measures how sensitive you are to various stimuli. Psychologist Véronique de Gucht developed the questionnaire. 'I want to demystify high sensitivity.'

The Feature Co-occurrence Constraint theory proposed in this dissertation provides a means to capture the development of the language learning child's segment inventory.

On March 12th, Jonathan Brown succesfully defended his doctoral thesis and graduated. The Leiden University Centre for Linguistics congratulates Jonathan on this great result.

Barbarism: from the 18th century to the present.

Knowledge and culture subproject 3:

The second and final volume of this co-authored study has just been published by J.B. Metzler. This second monograph explores the history of the concept of barbarism in the twentieth and twenty-first centuries.

The risk that conspiracy theories could incite a broad movement against the established political order is virtually non-existent. This is what researcher Jelle van Buuren of the Institute of Security and Global Affairs concluded in his PhD dissertation.

This book is about what happens when two people meet. Its main aim is to present an account of intersubjectivity.

We show that Kirchhoff ’s law of conservation holds for non-commutative graph flows if and only if the graph is planar. We generalize the theory of (Euclidean) lattices to infinite dimension and consider the ring of algebraic integers as such a lattice.

As of 1 June, Serge Fehr has been appointed as Professor Quantum information theory at the Leiden Mathematical Institute (MI). Fehr is employed by Centrum Wiskunde & Informatica (CWI) and as of his appointment works one day a week at the MI. Fehr’s research is focused on quantum cryptology and will…

De minor Data Science & Artificial Intelligence geeft een toegankelijke introductie tot de theorie en praktijk van datawetenschap en kunstmatige intelligentie. Studenten leren de basis van data-analyse en patroonherkenning in grote gegevensverzamelingen, hoe computers leren en ook het interpreteren…

On 12 May, GTGC Deputy Coordinator Valentina Carraro presented her work during the symposium “EU Crises: Rethinking European integration theories” at Maastricht University. The symposium was organised as part of the farewell event for the retirement of Prof. Tannelie Blom.

Measurements on a superconducting material show an abrupt transition between a normal metal and a 'strange' metal. The really strange thing, however, is that this abruptness disappears when the temperature falls. 'We don't have any theoretical machinery for this', says theoretical physicist Jan Zaanen,…

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.

This thesis studies the geometry of representation varieties and character stacks. These are spaces parametrizing the representations of a finitely generated group, typically the fundamental group of a compact manifold, into an algebraic group G.

Leiden students often prefer complicated theory and a difficult test to experiments. Yet associate professor Paul Logman believes students learn a lot from practical teaching. He challenges his students to come up with their research questions themselves. The Leiden Institute of Physics (LION) is at…

Promotor: W.Th.F. den Hollander, Co-promotor: F.R. Nardi

This thesis consists of three chapters, the first two of which concern division points of elements of the multiplicative group of a number field.

In this thesis, classes of strongly interacting quantum field theories, have been studied.

This thesis consists of three chapters. Each chapter is on a different subject. However, all three chapters address issues that arise in counting arithmetically interesting objects.

In September 2021, ACPA PhD Candidate Gabriel Paiuk will premiere a new work titled Sound Theory (The Clouds) as part of the 2021 Gaudeamus Muziekweek Festival. The performance will take place on September 10th, 20:30 at the De Helling (Utrecht, NL).

Conspiracy theories are of all times, and the government should never dismiss them as a fantasy of fools. Certainly not now, when it turned out that authorities made a conspiracy themselves with a journalist threatened with murder. Which proves that the truth is always more insane than you could have…

À La Découverte de la Hollande dans les années 1760-1770 : Pierre Famin, Emmanuel de Croÿ-Solre, François-César Le Tellier, Jean-Marie Roland de la Platière, Gabriel-François Coyer. Textes réunis et présentés par Madeleine van Strien-Chardonneau, Paris, Société française d’étude du dix-huitième siècle,…

Dividing Worlds: Tsunamis, Seawalls, and Ontological Politics in Northeast Japan

When professor Frank Israel graduated at Leiden Observatory some forty years ago, little did he know that one of his theories would be making headlines in 2018 - in the form of a 3D animation on the Internet, no less.