The Copenhagen interpretation of quantum mechanics states that a measurement collapses a wavefunction onto an eigenstate of the corresponding measurement operator.

Promotor: Prof.dr. S.F. Portegies Zwart

Transcutaneous vagus nerve stimulation (tVNS) was tested in chronic worriers. tVNS may reduce spontaneously occurring negative thought intrusions. After a worry induction, there was no longer an effect of tVNS. tVNS did not affect physiological responding to worrying.

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.…

President Trump believes that Iran’s economy is collapsing, and that this will leave Iranians no choice but to surrender to the demands of the United States. But these expectations might not come true, says Arash Pourebrahimi at the website of the Harvard Kennedy School.

The most famous cat in science is Schrödinger's cat, the quantum mechanical mammal, which can exist in a superposition, a state that is alive as well as dead. The moment you look at it, one of both options is chosen. Leiden University physicists simulated an experiment to catch this mysterious moment…

In Quantum mechanics, particles can be in multiple positions simultaneously. Yet, when a measurement is made, the particle is found only in one place. Technology has come to a point where we may design experiments that will tell us how.

The small quantum world and our world of perception obey different laws of nature. Leiden physicists search for the border between both worlds. In an article published soon in Physical Review Letters they set an upper limit.

Leiden physicists Tjerk Oosterkamp and Dirk Bouwmeester have received a 1.3 million euro Science-Groot grant from NWO to catch a mystery at the core of quantum mechanics, together with Amsterdam physicist Jasper van Wezel.

Promotor: Prof.dr. D. Bouwmeester, Co-Promotor: M.J.A. de Dood

The international conference ‘Lessons from Afghanistan’ touched on many serious issues and raised several reasons for concern. But it also ended on a positive note. While politicians on both the domestic and the international levels have failed to prevent the collapse of the Afghan state, and we are…

The greatest threat to the North Korean regime is not the outside world but its own developing private market and the growing frictions at the top. This was the argument put forward by North Korean exile Jang Jin-sung in his lecture in Leiden on 18 September 2014.

Research in the Daniela Kraft Lab focuses on self-assembly in biological and soft matter systems, ranging from anisotropic colloidal particles to lipid membranes, emulsions, and viruses.

PhD Defence

This study explores regional variation in the use of utterance-final particles by analyzing spoken Taiwan Mandarin data recorded from spontaneous conversations.

As Bolivia reels from the collapse of the government in November 2019, a wave of social protests, and now the impact of Covid-19, this book asks: where next for Bolivia?

Promotores: S.F. Portegies Zwart, E. M. Rossi

Large areas of space are filled by molecular clouds that consist of gas and dust grains that are the remnants of dead stars. When these clouds start collapsing, the decreasing temperature and increasing density cause gas particles to start accreting onto dust grain surfaces.

The research program of the QO group has three leading themes: Optical Physics, Quantum Optics, and Photon-Matter Interactions. We work mostly at the boundaries between these themes with entanglement as a bridging and binding agent.

A large, 64+ person space with multiple working zones in the Schouwburgstraat building, Den Haag. Tables fold and wheel, and chairs are also on wheels. There are multiple movable whiteboards which allow group working in various sizes. Windows and tables are additional writing surfaces. There is also…

The factors that dynamically sculpt the inter-regional correlation of brain patterns are poorly understood. Here, we test the hypothesis that they are shaped by the catecholaminergic neuromodulators norepinephrine and dopamine.

Promotores: J. Jonkers, K.E. de Visser

Promotor: Prof.dr. M. Danhof

Can children’s physical play events be considered as improvisational dance? And if so, what are the shared underlying structures and characteristics?

Promotor: Prof.dr. F.S. de Boer, Co-promotor: D. Clarke

On 21 February 2019, Ruben Zandvliet defended his thesis 'Trade, Investment and Labour: Interactions in International Law'. The doctoral research was supervised by Prof. dr. N.J. Schrijver.

Promotor: Jelle S. Kaastra Co-promotor: Jelle de Plaa

This ethnographic exploration of anticipation published in the Journal of the Royal Anthropology Institute draws on fieldwork among people with dementia and their families in the Netherlands.

A study into the investment and impact of construction projects on Mycenaean communities in Late Bronze Age Greece

Southern Africa has a rich tradition of social history, one inspired by the tumultuous changes that have regularly convulsed the region from the 1780s onwards. Scholars have always sought to understand what these changes meant for everyday life and emphasised a perspective of marginal groups, how these…

We explore the possibilities to combine magnetic resonance techniques with atomic force microscopy together in a single microscope: the MRI-AFM, also called Magnetic Resonance Force Microscopy (MRFM).

This book is the first grammar on Ternate Malay, a local variety of Malay spoken on the island of Ternate, North-Moluccas, Indonesia.

This dissertation aims at enhancing our knowledge of whether a CI provides sufficient access to auditory speech input to acquire verbal morphology by comparing outcomes of CI children to those of their normal hearing peers and to those of children with specific language impaired (SLI).

The Oral History project, as part of the Tell Balata Archaeological Park project, published an arabic-english booklet of local stories about the site of Tell Balata. An archaeological site near Nablus (West Bank).

This grammar presents an in-depth linguistic description of one Papuan Malay variety, based on fifteen hours of recordings of spontaneous narratives and conversations between Papuan Malay speakers.

Promotor: Prof.dr. J.W.M. Frenken

Promotor: J. van der Greef; Co-promotor: E. van Wijk, M. Wang

If gifted children are experts in using strategies, why do they experience problems with learning? Why do they underachieve?

The Vrijthof excavations (1969-1970)

Engin Kiliç defended his thesis on 11 june 2015

The territories that would make up what is today the Republic of Zambia officially became British in 1891. However, this did not equate to an on-the-ground presence of colonial authority capable of affecting the destiny and daily lives of people.

Dishoeck

The Institute of Political Science is a vibrant department with nearly 70 academic staff in Leiden and nearby The Hague.

Age of Rogues is a study of the frontier cultures of revolution that shaped the making of the modern Middle East. Rebels, revolutionaries, and racketeers played central roles in the violent process of imperial disintegration as it unfolded in the frontiers of the Ottoman, Habsburg, Romanov, and Qajar…

Circumstellar discs are the reservoirs of gas and dust that surround young stars and have the potential to become planetary systems.

The Leiden University Centre for International Relations (LUCIR) is a multi-disciplinary platform promoting research and education on international relations at Leiden University.