Onderzoeksgroepen in het Quantum Matter & Optics onderzoeksprogramma onderzoeken elektronische eigenschappen van interacties van materie en lichtmaterie, met de nadruk op quantuminformatie.

Hoe kunnen we de mysteries van quantummaterie verklaren?

Optical cavities are useful tools to enhance the interaction between light and matter, which is important to make good quantum emitters. However, it turns out that the cavities themselves (without any quantum emitters) are already interesting objects to study.

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

This thesis described the development of novel scanning tunneling microscopy techniques to investigate strongly correlated electronic states in quantum matter.

Why do black holes emit thermal radiation? And how does a closed quantum system thermalize?

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

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.

What physics controls the properties of quantum matter, such as how electrons flow inside high-temperature superconductors? This question has captivated the physics community and industry for decades, in part due to the great technological potential such materials have, but also because they have resisted…

Quantum annealing belongs to a family of quantum optimization algorithms designed to solve combinatorial optimization problems using programmable quantum hardware. In this thesis, various methods are developed and tested to understand how to formulate combinatorial optimization problems for quantum…

Promotor: Prof.dr.ir. J.W.M. Hilgenkamp, Prof.dr. J. van den Brink

Promotor: Prof.dr. D. Bouwmeester

Promotor: K.E. Schalm, Co-promotor: S.S. Lee

Promotor: Ronald Cramer, Co-promotor: Serge Fehr

A single self-assembled semiconductor quantum dot in a high-finesse optical microcavity - the subject of this thesis - is an interesting quantum-mechanical system for future quantum applications. For instance, this system allows trapping of an extra electron and thus can serve as a spin quantum memory,…

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

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

Promotor: R. Gill, Co-promotor: P. Massart

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 show how MRFM can usefully contribute to the field of condensed-matter.

The aim of this thesis is to present novel techniques for proving cryptographic schemes secure against quantum adversaries. Most results are within the context of an idealized model called the ‘quantum random-oracle model’.

This thesis addresses questions on effectively using variational quantum circuits for machine learning tasks.

Hoe quantum-ready ben jij? Want geloof het of niet, ook jouw toekomst is quantum. Nieuwe quantum-technologieën gaan onze samenleving meer beïnvloeden dan we ons nu realiseren. Hoe precies? Op deze pagina ontdek je meer over quantum.

Wat weet het grote publiek over quantum en wat vindt men ervan? Ook daar denken onderzoekers binnen Quantum Leiden over na.

Bedrijven met wie Quantum Leiden samenwerkt: Shell, TotalEnergies, Google, Volkswagen en Qu&Co. En met de volgende overheden en publieke organisaties: CERN, ESA, SURF, Gemeente Leiden, Provincie Zuid-Holland, Quantum Delta NL en InnovationQuarter.

One of the most important puzzles in modern astrophysics is the nature of dark matter.

De organisatie van het onderzoek binnen Quantum Leiden is in handen van onderstaande onderzoekers.

Wie zijn de mensen achter Quantum Leiden? Dat zijn natuurlijk de bevlogen en enthousiaste onderzoekers die nu keihard bezig zijn met onze quantumtoekomst. Maar vergeet ook niet hun voorgangers. En daarbij zitten onderzoekers van wereldfaam.

Promotor: A. Achúcarro Co-promotor: A. Boyarsky

During my PhD research, I studied the photon statistics of light emitted by a microcavity that contains a single quantum dot (QD) on resonance.

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

‘Moslims en islam zijn niet iets wat Europa is overkomen, ze zijn onderdeel van Europa. Sterker nog, de islam is een van de grootste constanten in de Europese geschiedenis’. Dat beargumenteert hoogleraar Maurits Berger in de Engelstalige podcastserie 'History of Islam in Europe' van de Faculteit Gee…

In my research, we developed a method to distinguish knots. A knot is a mathematical depiction of the everyday knot that occurs in ropes and cords.

Quantummechanica voor iedereen

Quantum Information Science & Technology (QIST) encompasses the understanding, design, construction and investigation of quantum information processing systems, such as quantum computers, quantum communication networks, and quantum sensors.

Thermodynamics is one of the founding scientific pillars that has helped us better understand heat engines, biology, ecosystems, and even black holes. While it fundamentally describes large systems by examining the bulk behavior of their constituents, it is anchored in the statistical equivalence of…

Leiden is sterk in het ontwikkelen van algoritmen. Verder zijn quantumnetwerken en quantumsensing belangrijke onderzoeksthema's. Als ook onderwijs en communicatie over quantum.

Quantum hardware comes with a different computing paradigm and new ways to tackle applications. Much effort has to be put into understanding how to leverage this technology to give real-world advantages in areas of interest for industries such as combinatorial optimization or machine learning.

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

This thesis investigates the contribution of quantum computers to machine learning, a field called Quantum Machine Learning. Quantum Machine Learning promises innovative perspectives and methods for solving complex problems in machine learning, leveraging the unique capabilities of quantum computers…

Onderzoeksgroepen in het Biological & Soft Matter onderzoeksprogramma ontrafelen de mechanismen in biologische processen en ontwikkelen nieuwe zachte materialen die geïnspireerd zijn door de natuur.

Promotie

Errors are everywhere, and mechanical failures are especially common: buckled grain silos and cracked support columns are, justly, seen as an issue to be avoided.

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.

Promotor: H.V.J. Linnartz