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

The first book ever on information-theoretically secure multiparty computation

Many important topics in computer science, such as the correctness of software, the efficiency of algorithms and the modeling of complicated systems, depend on sound theoretical underpinnings. In the Theory group, we study these fundamental building blocks and develop verification methods to prove system…

This thesis is about cosmological inflation and its relation to observations.

In the Netherlands, people probably grew up with De Fabeltjeskrant (a children’s show, ed.), but in France an introduction to fables plays a much more important role in a child's upbringing. PhD candidate Céline Zaepffel studied the role of fables in French education and teaching methods. It turns out…

Lecture

PhD defence

PhD defence

Source: Biosens Bioelectron, Volume 74, pp. 233-42 (2015)

Glucocorticoids (GCs) are widely prescribed as anti-inflammatory drugs due to their well-established immunosuppressive effects.

In surface science there is great effort to move from studying simple, flat model surfaces in vacuum to investigating more complex model catalysts in gas environments (in situ). This thesis gives three examples of such studies using microscopy and spectroscopy.

Promotores: Prof.dr. P.C.W. Hogendoorn & Prof.dr. H.P. Spaink, Co-promotor: Dr. B.E. Snaar-Jagalska

Fitness is more than physical health alone. An equally important aspect of our general well-being is mental fitness. Mental fitness refers to the fitness of the mind. During your PhD research, there might be periods in which you feel insecure or down. It is essential to take good care of yourself. Don’t…

Research into the wishes and (care) needs of older migrants

Supervisor: Andrea Martella

Source: PLoS ONE, Volume 10, Issue 3 (2015)

The Leiden University Sustainability Network is the platform for Leiden University staff and students to combine their efforts and support each other in making our university more sustainable.

The "Van Marum Colloquia" are a collaborative lecture series between the LION and LIC institutes, focusing on fundamental and applied surface science.

With his photo of a fish trapped in a rubber glove, external PhD candidate Auke-Florian Hiemstra has made it to the shortlist for the People’s Choice Award in the prestigious Wildlife Photographer of the Year competition. The photo shows the impact of Covid litter on wildlife.

Leiden Physicists have found evidence for the Berry-force that could be used for driving tiny nanomotors, just like a river drives a water wheel. Nanomotors could be used for drug delivery in the human body. Publication in Beilstein Journal of Nanotechnology.

Five researchers from Leiden University have been awarded a Starting Grant by the European Research Council (ERC). This grant of on average 1.5m euros enables researchers who show potential to start their own project, lead a research team and implement their best ideas.

Physics professor Jan Aarts starts a collaboration with chip manufacturer Intel to perform fundamental research in low-power, cryogenic computing.

Promotor: G.R. de Snoo

In een goedgevuld Teldersauditorium vond op maandag 24 juni het symposium ‘Het Erfgoed van Meijers: 70 jaar waardering en inspiratie’ plaats. Vanuit verschillende perspectieven werd gereflecteerd op de omvangrijke nalatenschap van de Leidse hoogleraar Eduard Maurits Meijers, die precies zeventig jaar…

Majorana particles have been getting bad publicity: a claimed discovery in ultracold nanowires had to be retracted. Now Leiden physicists open up a new door to detecting Majoranas in a different experimental system, the Fu-Kane heterostructure, they announce in Physical Review Letters.

The Italian physicist Andrea Morello is one of the pioneers of the quantum revolution. He is currently doing research at the University of New South Wales in Sydney, but cherishes his time as a PhD candidate in Leiden.

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,…

Affective Computing (AC and sometimes called ‘Emotional AI’) provides opportunities to automatically process emotional data. However, is EU data protection law fit for purpose when it is applied to such AC approaches?

To be able to measure small forces or small deviations from Boltzmann, the external vibrations at the resonance frequency must be very low. To achieve this, we have developed a very soft vibration isolation system and combine it with several other measures to reduce vibrations in our dilution refrigerators.…

An overview of awards and prizes granted to our staff and students in 2017, as well as special appointments and royal distinctions.

The dissociative chemisorption of a molecule on a transition metal surface represents a rate-limiting step in many heterogeneously catalyzed processes, whereby most chemicals are made. In spite of the importance of this reaction, an accurate first principles approach to modeling it does not yet exist.…

Consumers are encouraged to think of food production and consumption as amoral activities – Michiel Korthals in his book Goed Eten: Filosofie van voeding en landbouw (2019, 353)

A microscope with incredible sharpness that leaves samples unharmed – Guido Stam helped develop one. During his PhD research, he combined light and electrons to study biological samples. ‘We can now measure things that simply weren’t possible before.’

Promotor: E. Bouwman, Co-Promotor: S. Bonnet

Promotor: M. Franx, Co-Promotor: I.F. Labbé

Promotores: A.H. Meijer, H.P. Spaink

This thesis aims to demonstrate how the achromatic nature and design flexibility of liquid-crystal optics can be used to improve high-contrast imaging instruments to facilitate detailed exoplanet characterization.

Irene Battisti is the discoverer of the year 2019. The physicist won the C.J. Kok Public Award for her research into microscopy and superconductors.

Since 2015 the United Nations have declared 11 February the International Day of Women and Girls in Science. Leiden University organized a public event for over a hundred visitors. In between a lecture on the building blocks of life and a talkshow on the impact of science on society, high school students…

The application procedure is broken down into three parts.

On 2 and 3 October 2017, a delegation of the Child Law Department has participated in the 15th European regional conference of the International Society for the Prevention of Child Abuse and Neglect in The Hague.