This thesis discusses the discovery potential of Intensity Frontier experiments.

My work is motivated by the necessity to extend Standard Model of Particle Physics in order to explain three observed phenomena that this great theory fails to accommodate

After many years of preparations, CERN has approved a groundbreaking new experiment: the Search for Hidden Particles (SHiP). Physicist Alexey Boyarsky was involved from the start. ‘We know there is physics that’s missing and we aim to find it.’

Studying Physics is an exciting journey through the foundations of nature: from the infinitesimal (particle physics) to the grandest scale (cosmology). Physics is a varied study programme that provides a solid foundation in theory and experimentation, with attention devoted to their practical applic…

Our research primarily focuses on the early universe and its origins in theories that go beyond the Standard Model of particle physics.

In this thesis, I study the formation of large-scale structure and the physics of particle acceleration at large scales (~Mpc).

In the spirit of 'unity in diversity', our objective is to promote insight into and appreciation for the wonder that the same physical laws and mathematical concepts apply to the whole of nature, from the largest to the smallest energy and length scales. We strive for the application of abstract theoretical…

The Standard Model (SM) of particle physics fails to explain several observed phenomena and is incomplete. In order to resolve this problem, one may extend the SM by adding new particles.

The master’s specialisation Research in Theoretical Physics prepares you for a PhD position in theoretical physics. The research entails a broad range of topics including High Energy Physics and Particle Cosmology, Theoretical Physics of Life Processes and Condensed Matter Theory.

Brownian motion is the random motion of (colloidal) particles due to collisions with the atoms and molecules of the solvents, which are moving due to temperature.

In this research, for the first time a detailed description as well as systematic and comparative analysis of the final particle system in Chinese are provided.

Duality, stochastic processes

This is the physics summer school of Leiden University. It is part of the Leiden Institute of Physics (LION). The summer school is intended for Bachelor (BSc) students in physics. It covers topics from quantum matter and optics, to biological & soft matter physics and cosmology and theoretical physics.…

Physicists at the Leiden Institute of Physics (LION) conduct fundamental research into physical phenomena. They are inspired by curiosity and the desire to know more about the world in which we live. This research has always paved the way for new practical applications. These are something that the…

A couple of years ago, theoretical physicist Carlo Beenakker tracked down the Majorana particles and inspired Leo Kouwenhoven from TU Delft to try to create them in a superconducting nano-structure. He succeeded in doing so in 2012, and the news made headlines around the world. But a lot of work still…

The miniaturization of machines towards the micron and nanoscale requires the development of joint-like elements that enable and constrain motion. We developed a facile method to create colloidal joints, that is, anisotropic colloidal particles functionalized with surface mobile DNA linkers that control…

Promotor: W. Jiskoot, Co-promotor: A. Hawe

The intracluster medium (ICM) is a hot, tenuous and X-ray emitting gas that pervades galaxy clusters.

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

It is an established fact that the Standard Model has to be extended to explain the so-called Beyond the Standard Model (BSM) phenomena: dark matter, matter-antimatter asymmetry of the Universe and neutrino flavour oscillations.

Particles are omnipresent in biopharmaceutical products. In protein-based therapeutics such particles are generally associated with impurities, either derived from the drug product itself (e.g. protein aggregates), or from extrinsic contaminations (e.g. cellulose fibers).

This doctoral thesis comprises four studies on the content and structure of physics teachers’ belief systems about teaching and learning physics in secondary education in the Netherlands.

On the largest scale, the Universe resembles a cosmic spiderweb. Most galaxies coexist in small groups within the threads of this web. At the nodes of the threads are enormous groups of galaxies forming the largest structures in the universe still held together by gravity: clusters of galaxies.

Promotors: W. Jiskoot; G.J. Witkamp, Co-promotor: M.R. Nejadnik

The master’s specialisation Cosmology at Leiden University is positioned at the interface between Theoretical Physics and Observational Astronomy. The main elements are theory, data analysis and numerical simulations, with research on the origin of dark matter as one of the highlights.

The research in my group addresses a range of topics related to quantum many-body physics.

Theoretical physicist and cosmologist Alexey Boiarskyi has been appointed full professor per 1 October.

As of April 1, physicist Dorothea Samtleben is the first female program leader of Nikhef, the National Institute for Subatomic Physics. Samtleben will lead the Neutrino Physics group there. ‘This is an important step for Nikhef when it comes to diversity.’

Detecting nanoscopic objects plays an important role in nanoscience in particular, in the rapidly growing field of nanobiology. The forebear to modern super-resolution microscopy for single molecule investigation, is fluorescence microscopy.

In this thesis, I studied the origin and evolution of the non-thermal radiation in merging galaxy clusters.

Promotor: F.H.J. Redig, Co-Promotor: W.T.F. den Hollander

Are you thinking about studying Physics? Learn more and watch the introduction video.

Research at the Leiden Institute of Physics (LION) is foundational and curiosity driven. All our scientists share a desire to increase the knowledge of the world around us, in an open atmosphere of inquiry from which innovative ideas emerge that provide applications and value for society.

Not only does she excel at her research, she is also active in outreach and started a collaboration outside her own field during her PhD. Yevheniia Cheipesh has been awarded the first prize in the For Women in Science Rising Talent Prize by L’Oreal, UNESCO and the Royal Holland Society of Sciences and…

In this thesis we investigated the ability of two-photon multifocal microscopy for single-molecule microscopy in live cells and organisms.

Not many scientists can claim to have received funding from NWO to blow bubbles and play with sand, but Martin van Hecke definitely can. Van Hecke, Professor of the Organisation of Disordered Matter, delivered his inaugural lecture on Friday 4 September, under the enigmatic title of: ‘Bellen, bollen,…

PhD candidates carry out a programme of independent research and additional (limited) course work, culminating in production of a PhD thesis in typically 4 years.

In the early universe, the dynamics of the Higgs field can give rise to many interesting phenomena.

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

The master’s programme Physics at Leiden University offers a wide range of specialisations from theoretical research to cosmology. You will be trained for a career in research or for a more practical-oriented specialisation. The programme offers a wide choice of individual study paths that take into…

This handbook provides a resource for those already familiar with some kinds of micro-particles who wish to learn more about others, or for those just starting out in the study of microremains who wish to have a broad understanding about microscopic archaeology.

The physics of black holes appears to be as far removed from the physics of electrons in metals as it can be.

This master’s programme combines Physics with Data Science. You will learn how physics has its own tricks to deal with big data and how techniques from machine learning and deep learning can be applied to classical and quantum data. The first focus of attention is on classical data, including data mining,…

Leiden has a strong tradition in theoretical physics, thoroughly linked with experimental disciplines.

Light obscuration (LO) is the current standard technique for subvisible particle analysis in the quality control of parenterally administered drugs, including therapeutic proteins.

Gold nanorods are biocompatible nanoparticles that present an excellent two-photon signal that can be used to get high spatial resolution inside living cells. Gold nanorods are photostable and therefore can be followed inside cells for long time, with possible applications as trackers in live cells.