Advancing the understanding of the interaction of light and matter on the single-quantum level is important for near-future quantum technologies but also to answer fundamental questions.

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 group explores the larger domain of quantum measurement. In particular we investigate two themes that are closely connected: The detection of specially prepared quantum states of light and understanding and characterizing quantum photon detectors.

Diplomatica: A Journal of Diplomacy and Society addresses the broad range of work being done across the social sciences and the humanities that takes diplomacy as its focus of investigation.

On 18 October 2017, Leiden Law School was honored to welcome a group of experts upon invitation of Prof. M.R. Bruning, professor of Child Law and head of the Child Law Department of Leiden University, to discuss current and future research projects in the field of international child abduction law and…

Physicists have manipulated light with large artificial atoms, so-called quantum dots. Before, this has only been done so well with actual atoms. It is an important step towards light-based quantum technology. Publication on August 30th in Nature Communications.

Scientists need individual photons for quantum cryptography and quantum computers. Leiden physicists have now experimentally demonstrated a new production method. Publication in Physical Review Letters on July 23rd.

Leiden physicists have created a light source that emits individual particles in an identical state through optical fibers. Using this setup, their measurements can last longer and are more efficient, meaning they can perform more in-depth research on bizarre quantum effects, such as interference and…

Neuroscientist Anne Urai has been awarded a Veni subsidy to further develop her ideas over the coming four years on how the brain makes choices. Why did she receive the award? Urai answers five questions about her Veni grant for young researchers.

Brothers and sisters within a family, with the same parents, experience their upbringing differently. As well as the impact of their own negative experiences, the way siblings experience their upbringing also plays an important role in anxiety and depression. This is the conclusion reached by Marie-Louise…

Conference

Paul Wouters is not keen on people with a dual agenda. However, for the coming period, he himself will be in that very position. Besides his work as Dean of the Faculty of Social and Behavioural Sciences (FSW), he is temporarily coming to strengthen the Board of the Faculty of Science. Who is this Acting…

Lotte van Dillen has every confidence in the Executive Board of new-style Institute Psychology. ‘If we work on the basis of everyone’s good intentions, we’re going to do great.’ If you lack confidence, you’re not the kind of person to jump on your bike and go off to Sicily. Want to find out more about…

The Executive Board of the Institute of Psychology has a new Director of Operational Management. It’s the perfect role for Paula van den Bergh. ‘For me, “connection” is a nice word. If you see the connections between things, you immediately see the logic behind the processes.’ Her career has taken her…

The new Executive Board of the Institute of Psychology became effective on 1 February 2022. Scientific director Andrea Evers tells us where she gets her energy from.

In a creative assignment as a part of the bachelor's course Visual Culture, students explored the impact and complexity of visual culture by means of visual culture. The resulting artworks were of such a high quality that it was decided to present these in an exhibition.

Finally we know for sure that there is a black hole at the centre of our own galaxy. Today, astronomers unveiled the first ever photo of Sagittarius A*, a super-massive object at the centre of the Milky Way. This picture could only be taken thanks to the cooperation of telescopes worldwide.