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

Scattering of light in the presence of nano-structured materials, i.e. with features in the order of the wavelength of the light or smaller, reveals details of how light interacts with matter at the nanoscale.

The field of exoplanet research is rapidly advancing through the development of new technology, observing techniques, and post-processing methods.

Promotores: Prof.dr. C.U. Keller, Prof.dr. H.C. Gerritsen

Promotor: Prof.dr. M.A.G.J. Orrit

This thesis examines silicon pore optics (SPO), a technology that exploits silicon wafers from the semiconductor industry to create extremely high quality X-ray optics, by studying its manufacturing process, applications, and prospects.

Biological polymers, including proteins and the genome, undergo folding processes crucial for their proper functioning. Even slight changes in the folding structure of these biopolymers can have significant implications, leading to the development of various pathological conditions, such as neurodegenerative…

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.

In human cells, a meter-long DNA is condensed inside a micrometer-sized cell nucleus. Simultaneously, the genetic code must remain accessible for its replication and transcription to functional proteins.

Promotor: T. Schmidt, Co-promotor: S. J.T. van Noort

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.

Quantum position verification (QPV) - the subject of this thesis - is a novel way to authenticate unknown nodes in a quantum network without the need to physically meet up.

This thesis describes the development and validation of new high-contrast imaging techniques, with the ultimate goal of enabling the next generation of instruments for ELT-class telescopes to directly image Earth-like extra-solar planets orbiting around nearby stars.

Promotor: E.R. Eliel, Co-Promotor: M.J.A. de Dood

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

Promotores: Prof.dr. D. Bouwmeester, Prof.dr. A. Fiore (TU Eindhoven)

More than 5,000 exoplanets have been found over the past couple of decades. These exoplanets show a tremendous diversity, ranging from scorching hot Jupiters, common super-Earths, to widely separated super-Jupiters on the planet/brown dwarf boundary.

Patterned detectors are an existing technology that can be found in almost all color cameras.

Spectroscopic studies on fluorescent single molecules in organic condensed matter does not only provide information about the molecule itself, but also its near environment. By suppression of phonon-induced broadening of spectral lines through cooling to low temperatures, small changes in the spectral…

Alireza Mashaghi van het Leiden Academic Centre for Drug Research (LACDR) zal met behulp van de modernste technologie verkeerd gevouwen eiwitten onderzoeken die een rol spelen bij spierdystrofie. Zijn doel: tot nieuwe inzichten komen die in de toekomst leiden tot nieuwe therapieën. Mashaghi ontvangt…

Promotor: Prof.dr. D. Bouwmeester

De ontwikkeling en bouw van de Cold Optics Bench van het MATISSE-instrument dat onder leiding stond van de Nederlandse Onderzoekschool voor Astronomie (NOVA), is afgerond. Deze Nederlandse bijdrage werd op donderdag 10 april 2014 op de Hannover Messe in Duitsland door ir. Felix Bettonvil van de Leidse…

All life on earth contains DNA, which is used to store biological information. Organisms compact their DNA in order for it to fit inside their cell(s).

For each living organism health is ensured by correct functioning of its cells. Cells therefore have elaborate methods for regulation of their proteins.

Binnen Quantum Leiden doen verschillende groepen onderzoek naar quantumnetwerken en quantumsensing.

Natuurkundige Martin van Exter werkt met licht op nanoschaal, en bevindt zich daardoor aan het front van het onderzoek naar de quantumcomputer. Maar als opleidingsdirecteur heeft hij ook een visie op natuurkunde-onderwijs. In zijn oratie belichtte hij beide kanten van deze medaille.

In the thesis we demonstrated an 85% state transfer efficiency between two mechanical modes coupled to a common optical mode via stimulated Raman adiabatic passage (STIRAP) in the classical regime. We also showed possibilities to manipulate quantum states of the mechanical modes via STIRAP.

De biomedische wetenschap heeft een steeds grotere behoefte aan beeldmateriaal van biologisch materiaal op het niveau van cellen en eiwitten. Tjerk Oosterkamp, hoogleraar Experimentele natuurkunde, is gespecialiseerd in het ontwikkelen en gebruiken van tastmicroscopen om biologisch materiaal te bestuderen.…

De Physicaprijs 2016 is toegekend aan Michel Orrit vanwege zijn baanbrekende werk op het gebied van één-molecuul-spectroscopie.

The interest of this thesis lies in spin transport in normal metals and superconducting half-metallic junctions.

A plasma is an ionized gas with very low electrical resistivity. As such, magnetic field lines are 'frozen in' and move with the fluid. Magnetic field lines that are linked, knotted and tangled, cannot be undone by the fluid motions.

In this thesis we use Josephson and noise scanning tunneling microscopy for the study of conventional, unconventional (iron-based) and disordered superconductors. On the one hand, Josephson scanning tunneling microscopy allows us to directly visualize the superfluid density with high spatial resolut…

De tweejarige masteropleiding Physics wordt aangeboden door het Leids Instituut voor Onderzoek in de Natuurkunde. De opleiding is theoretisch en experimenteel. Er is ruime aandacht voor onderzoekstraining. Ook bieden we veel keuzemogelijkheden en op maat gemaakte, individuele studieprogramma’s.

We use DNA strands to stabilize few-atom silver clusters, which show unique optical and chemical properties. This thesis involves the study of these constructs for various applications.

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

Werken bij een topfaculteit? Ontdek de vacatures bij Wiskunde en Natuurwetenschappen en solliciteer meteen.

This thesis describes the implementation and on-sky demonstration of high-resolution integral-field spectroscopy for extreme adaptive optics systems that are used to find and characterize exoplanets.

Na het afronden van de bacheloropleiding volgen verreweg de meeste studenten de masteropleiding.

This dissertation focuses on investigating the public communication around quantum science and technology that may affect public engagement.

Menselijke cellen beschermen hun eiwitten tegen ontvouwen en samenklonteren. Dat ontdekten biofysicus Alireza Mashaghi en zijn team na zeven jaar diepgaand onderzoek naar de vouwmechanismen van eiwitten. Met een nieuwe, baanbrekende methode slaagde het team erin om een afzonderlijk eiwit te vouwen en…

Lezing

Sterrenkundige Koen Kuijken en natuurkundige Tjerk Oosterkamp krijgen ieder een grote subsidie van NWO. Hiermee gaan zij nieuwe onderzoeksfaciliteiten bouwen.

Promotor: Prof.dr. E. Eliel, Co-Promotor: M.J.A. de Dood

Surface acoustic waves (SAWs) are mechanical waves that travel along the surface of a material and find many applications in modern technologies due to the ease of excitation on piezoelectric substrates via interdigital transducers (IDTs).

This thesis aims to improve the detection from ultra-weak single emitter by enhancing their emission properties with plasmonic nanostructures. We exploit the wet-chemically synthesized single crystalline gold nanorods (GNRs) as our basic frameworks in the whole studies, simply because of their unique…

n this PhD thesis, the recombination of different atomic lattices in stacked 2D materials such as twisted bilayer graphene is studied. Using the different possibilities of Low-Energy Electron Microscopy (LEEM), the domain forming between the two atomic layers with small differences is studied.

One of the key limitations of the direct imaging of exoplanets at small angular separations are quasi-static speckles that originate from evolving non-common path aberrations (NCPA) to which the primary adaptive optics system is inherently blind. The main focus of this thesis is the development and…

In this thesis, we show how MRFM can usefully contribute to the field of condensed-matter.