The van Exter group has an extensive history of prior research in classical and quantum optics. As former part of the group of Han Woerdman, we have studied topics as diverse as:

Our world is constantly changing. Developments in the field of technology, data and society determine how we tackle security. This demands a new vision on security.

This week Dutch newspapers NRC and de Volkskrant consulted scientists from the Leiden Institute of Advanced Computer Science (LIACS) about the impact of the Cambridge Analytica storm. This company gained insight into the data of 50 million Facebook users.

PhD defence

Andrea Evers, Professor of Health Psychology at Leiden University, has won the Stevin Prize – alongside the Spinoza Prize, the highest scientific award in the Netherlands. She is the third social scientist from Leiden in a row to win one of these prizes. ‘Leiden attracts freethinkers.’

We asked our Winter School students to evaluate the effect and significance of this learning experience on their current research trajectories and future plans. Here are some reflections.

On Monday 2 September, a computer malfunction severely crippled several hospitals in the Dutch province of Gelderland. Which had a huge impact on patients’ appointments. Daan Weggemans, researcher at the Institute for Security and Global Affairs (ISGA) was interviewed on the issue by Dutch regional…

The Covid pandemic has had a considerable impact on academics’ work and well-being. They have had much less time to spend on their research. The Young Academy and the Dutch Network of Women Professors have conducted research into how the situation has been for academics. The two organisations have recommendations…

Scientists regularly appear in the media. They participate in science cafés, write a popular-science book or visit school classes. In that way, they want to convey their knowledge and enthusiasm to society. But do they succeed? To answer that question, a new website is launched, with a toolbox full…

Machine learning - on classical computers- has made great progress in the past five years. Computer translation of speech and text is just one example. In Leiden, some researchers expect that machine learning, empowered by quantum systems, even if they only contain a few dozen qubits, can lead to a…

MRFM combines the principles of magnetic resonance and atomic force microscopy.

Working towards resilient communities, transparency in science and connecting with the employment market – these are the three key themes being addressed by the departments of Social and Behavioural Sciences at Dutch universities. On 11 February, they presented a joint sector plan to Marcelis Boereboom,…

European research infrastructures must become more sustainable in order to make the most of their scientific potential and thus increase European competitiveness, the League of European Research Universities (LERU) states in a report.

Course, Course / Workshop

Unconstrained day-to-day activities are difficult to quantify and how the corresponding movements shape the brain remain unclear. Here, we recorded all touchscreen smartphone interactions at a sub-second precision and show that the unconstrained day-to-day behavior captured on the phone reflects in…

The AAM-LR project aims at building a demonstrator of a web service that will help filed researchers to annotate audio- and video-recordings.

News, events, announcements, social media and more about the building of the new Middle Eastern Library in Leiden

We study the link between the acoustic, behavioral and physiological health of birds and prominent pollution factors. We aim to explore causation through experimental studies on detrimental factors like traffic noise, particulate matter and chemical toxins. Our primary target is scientific progress…

Lecture, LACG Meetings

Professor Simon Portegies Zwart and doctor Jeroen Bédorf had the honour to write for the IEEE Software magazine.

The environment also benefits when people follow national nutritional guidelines, Paul Behrens demonstrated in research published in PNAS. The publication attracted media attention both at home and internationally.

Marliese Vollebregt (BA International Studies, MA International Relations) works at JINC, a Dutch NGO focusing on equal opportunities for children. After graduation, she first became a ski instructor for kids in Austria, something she had dreamed of for a long time. “My biggest advice for all of you…

Stressful events and a lack of support from the environment are both consequences and causes of mood swings in people with a bipolar disorder. This is the finding of PhD research by Leiden clinical psychologist Manja Koenders. PhD defence 7 April.

On Tuesday 4 September, Martina Vijver delivered the scientific lecture during the academic opening of the Faculty of Science. Martina is professor in Ecotoxicology at CML and would like to have collaborations with colleagues from the Leiden Centre of Data Science. We had a brief interview with her.

Tuesday 7 September sees the release of the book ‘Plots stond het Leidse leven stil’ by Charlotte Boin, a freelance writer from Leiden. This book of interviews gives an impression of the turbulent effect of coronavirus on the lives of students, researchers and partners of Leiden University.

The material and intellectual presence of Egypt is at the heart of Western culture, religion, and art from Antiquity to the present. In his book ‘Beyond Egyptomania. Objects, style and agency’, archaeologist Miguel John Versluys not only presents the Nachleben of Egypt as a major constituent of (European)…

The LUCAS Audience Award 2021 has been awarded to Nadine Akkerman. This is a prize for researchers who appeal to an audience wider than the academic community. The prize consists of 1000 euros, a trophy and eternal fame.

Charisma K. Lepcha (PI, Sikkim University), Pradyut Guha (co-PI, Sikkim University), Rajib Sutradhar (co-PI, Christ University Bangalore) and Erik de Maaker (Leiden University) have been awarded a two-year grant of USD 18.000 to conduct research on the impact of ‘green farming’ on the sensitive mountain…

While studying Indonesian languages and cultures, Rennie Roos started a company. Today he has been working in Indonesia for more than eight years. Where does his love for this country come from? And how does he look back on his studies? ‘I actually wanted to become a pilot.’

To what extent did the Netherlands grow rich from the Transatlantic slave trade? In his dissertation 'Walcherse Ketens', Gerhard de Kok looks at Vlissingen and Middelburg, the most important slave trade cities in the Netherlands during the second half of the 18th century. It turns out that, although…

Starting 2 July 2022, a new exhibition will be opened to the public at the Old Observatory: More-than-Planet. This exhibit asks the question: how do we imagine our planet?

The starting point of human-induced landscape changes has been under permanent debate. It is widely accepted that the emergence of agriculture strongly increased human impact on their environments. However, foragers can and do actively transform land cover and ecosystems. Ethnographic observations,…

Advanced sensing techniques require graphene with high quality and well-controlled surface chemistry.

On 8 December, Friday afternoon, the second year students of the Honours College track ‘Tackling Global Challenges’ presented their final assignment for the Competences Lab course. The goal was to set up an impact project and organize an event about it. The diverse groups listened and shared their ideas…

World history is often framed in terms of flows of people and migration: humans coming ‘out of Africa’, the spread of farmers in the Holocene, Phoenician and Greek diasporas over the ancient Mediterranean, the colonization of the world by Europeans from the 16th century onwards. Together with his Exeter…

A more efficient solar panel sounds great. But what if these new panels consume more toxic materials, or their production consumes a lot of energy? Leiden environmental scientists, together with colleagues from the Fraunhofer ISE, address this multifaceted question in a new publication in the prestigious…

Learning with the City, a partnership between the Municipality of Leiden, Leiden University and University of Applied Sciences Leiden, has a new online platform. Learning with the City aims to use knowledge and expertise from higher education to solve social issues in Leiden. The platform will help…

After Columbus landed on the island of Hispaniola (present-day Haiti and the Dominican Republic), the farming culture of the indigenous people quickly disappeared. This has been demonstrated by Leiden archaeologists and colleagues from other universities on the basis of soil research. Publication in…

The Hague Journal of Diplomacy is delighted to announce it will be starting its own podcast series! The series will be aimed at bringing the themes of the journal’s research off the page, and onto the discussion table. Each episode will feature a guest who will share their insights and personal experience…

Bachelor's and master's students and PhD candidates came together from 10 to 13 July at Campus The Hague for the EUniWell Summer School ‘COVID-19: Impact on European health & well-being’. The participants attended lectures and workshops on the impact of the pandemic on public health. They also discussed…

In the research project, Leiden University, Utrecht University and Radboud University will together analyse the issues facing the judicial system in the Netherlands during the coronavirus crisis, the measures taken and their impact.

Nitrogen deposition does not only affect plant biodiversity, but also strongly affects the composition of the remainder of the food web, through the changes in plant composition. In an unprecedented analysis of population changes of butterfly and moth species, an international research team including…