Sarah de Rijcke and Paul Wouters (CWTS) are partners in a new European consortium funded by the Swedisch Riksbankens Jubileumsfond: Knowledge in science and policy.

The genetic information of all living organisms is contained in their DNA. Cells modify the degree of DNA compaction by epigenetics, which largely determines what genes are read out and which genes are transcriptionally silent.

Dr. Sarah Giest presented her paper on Digital Access, Data-Driven Policymaking and Public Service Delivery during a research feedback seminar.

In deep reinforcement learning, searching and learning techniques are two important components. They can be used independently and in combination to deal with different problems in AI, and have achieved impressive results in game playing and robotics. These results have inspired research into artificial…

The place of European states and institutions in world politics is the core focus of this pillar. Research on this theme concerns European actors’ ability to promote peace, security and justice in their neighbourhood and to shape the future of global governance by translating its economic size into…

In my thesis I study Majorana fermions from three different perspectives. The first one corresponds to non-interacting Majorana fermions that, however, pose non-trivial topological properties. The second one corresponds to strongly interacting Majoranas and the third to relic neutrinos. No one knows…

Promotor: C. W. J. Beenakker, Co-promotor: J. K. Asboth

In this paper, Sarah Giest and Bram Klievink highlight the effects of AI implementation on public sector innovation. This is explored by asking how AI-driven technologies in public decision-making in different organizational contexts impacts innovation in the role definition of bureaucrats.

Make more fluid: In condensed matter systems, electrons can acquire unusual properties from their interaction with the atomic lattice.

My PhD research is devoted to studies of the conjectural cluster-algebraic symmetry in the theory of topological string, which is the simplest, however already non-trivial sector in the theory of string.

Promotor: C.W.J. Beenakker, Co-promotor: M.T. Wimmer

In unconventional high temperature superconductors, supercurrent vortices are known to spoil the Landau levels. In this thesis the emergence of Landau levels is studied in different types of superconductors: Weyl superconductors, and the Fu-Kane heterostructure.

The studies in this thesis are focused on the physical effects in the flat band materials. The results contain the discovery of strong enhancement of RKKY spin-spin interactions with specific geometric arrangement and dynamical generation of excitonic order parameter with high magnitude.

A Josephson junction is a device where a thin insulating barrier or a nanostructure is placed between two superconducting leads. Such a junction is essential to superconducting qubits that store quantum information due to its anharmonic spectrum.

Leiden University has signed a substantial number of Memoranda of Understanding with institutions in Latin America and the Caribbean Region.

The members of Young Academy Leiden do research on a large variety of topics. In our first (and perhaps only) LEGO ‘show-us-what-you-do’ challenge, they all made a short movie on their own research, using only LEGO. Watch their movies here.

The Laboratory for Human Osteoarchaeoloy examines human remains and their burial context to address questions about the human past.

In this special edition of Information Polity there is a focus on the transparency challenges of using algorithms in government in decision-making procedures at the macro-, meso-, and micro-levels.

This thesis covers several aspects of quantum algorithms for near-term quantum computers and its applications to quantum chemistry and material science.

The CIGR brings together a diverse range of unique expertise in genome research rooted in biology, chemistry and physics. Members of the CIGR investigate genome folding and genome transactions. An important aspect is direct as well as long term relevance for medicine. The available expertise extends…

Quantum computing is an emerging technology, which holds the potential to simulate complex quantum systems beyond the reach of classical numerical methods.Despite recent formidable advancements in quantum hardware, constructing a quantum computer capable of performing useful calculations remains challenging.In…

In this thesis we study quantum transport phenomena on the nanometer scale, in two classes of materials: topological insulators with induced superconductivity and graphene superlattices.

This thesis provides an overview of the development of the Pair Configuration to Molecular Activity Coefficient (PAC-MAC) model.

This thesis covers various applications of topology in condensed matter physics and quantum information.

Promotors: Prof.dr. J. Zaanen, Prof.dr.ir. H. Hilgenkamp

This research proposal focuses on the investigation of the poetic potentials of negativity through the exploitation of failure in sound based artistic practices - a context that has not been extensively addressed.

Since 1990 Leiden University has awarded the William of Orange medal to individuals of eminent national or international social standing.

The Executive Board is responsible for the management and administration of the entire University.

CT scanning of skeletal remains can tell us about how strong or weak a persons bones were and we can relate that back to diet, activity, and reproductive factors.

Meet the core staff behind Global Transformations and Governance Challenges, which consists of a Professor, a postdoctoral researcher, three PhD candidates, and a Programme Officer.

The course is taught by experts from Leiden University’s Institute of Security and Global Affairs, alongside leading practitioners. Their expertise spans international relations, security policy and counterterrorism, bridging academic insight with real-world experience.

Meet the core staff behind Global Transformations and Governance Challenges.

This edited volume by Jeff Fynn-Paul pushes forward the debate on the role of entrepreneurs in making war and building states in Europe and the Ottoman Empire.

Promotor: C.W.J. Beenakker, Co-Promotor: A.R. Akhmerov

This thesis is a collection of theoretical works aiming at adjusting quantum algorithms to the hardware of quantum computers.

Protein–protein complexes are formed via transient states called encounter complexes that greatly influence the formation of the stereospecific complex.

In some condensed matter systems, such as the surface of a 3D topological insulator, the electrons are effectively massless and we must necessarily use the massless Dirac equation to describe them.

Promotor: C. W. J. Beenakker, Yu. V. Nazarov, Co-promotor: J. Tworzydlo

Can we make quantum devices from quantum surprises? And can we explore and build life from the nanoscale up?

Electrons in a crystal lattice have properties that may differ from those of a free electron in vacuum.

Majorana fermions in superconductors are the subgap quasiparticle excitations that are their own antiparticles.

This project maps the policy of ‘Paz Total’ (Total Peace) and ongoing peace negotiations between non-state armed groups and the government of Colombia under the presidency of Gustavo Petro (2022-2026).

Zaanen

With the help of quantum mechanics, digital quantum hardware may be able to tackle some of the problems that are too difficult for ordinary computers. But despite these expectations and the ongoing effort of the research community, reliable quantum computers are not yet realized in a lab setting.

Promotor: Prof.dr. C.W.J. Beenakker

This thesis describes how to scale down concepts of macroscopic mechanical metamaterials to the thermal scale using a system of flexibly-linked colloids.

Understanding interactions in quantum many-body systems remains one of the most profound and difficult challenges in condensed matter physics.