Promotor: H.J.A. Röttgering, Co-promotor: M. Haverkorn

Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: M. Haverkorn

There are many interpretations of quantum mechanics, and ultimately experiments are needed to verify or falsify these interpretations.

The elementary excitations of magnets are called spin waves, and their corresponding quasi-particles are known as magnons. The rapidly growing field of Magnonics aims at using them as information carriers in a new generation of electronic devices, (almost) free of electric currents.

In this thesis, we describe the latest advances in SQUID-detected Magnetic Resonance Force Microscopy (MRFM).

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

Promotor: T.H. Oosterkamp

Promotor: Prof.dr. H.J.M de Groot, Co-Promotor: A. Alia

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

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.

Ferritin is a spherical metalloprotein, capable of storing and releasing iron in a controllable way. It is composed of a protein shell of about 12 nm and within its cavity, iron is stored in a mineral form.

In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

Binnen het Graduate Programme van Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) is de aanvraag voor de 'Netherlands Magnetic Resonance Research School' gehonoreerd. Deze onderzoeksschool is een van de 18 gehonoreerde aanvragen. Vier Leidse Graduate Schools zijn gehonoreerd.

Advanced UHF MRI techniques provide powerful tools for studying the zebrafish brain, an emerging model in neurological research. In this work, various MRI and localized MRS methods are optimized and employed for UHF strength for studying the zebrafish brain.

This thesis investigates the relations between metabolism and anatomy through the use of Magnetic Resonance Imaging (MRI).

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

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

Light-Harvesting Complex II (LHCII) is responsible for light absorption and excitation energy transfer in plants and photosynthetic algae, while in high light it undergoes conformational changes by which it quenches excitations to prevent photodamage.

Triplet superconductivity refers to a condensate of equal-spin Cooper pairs (pairs of electrons with equal spin).

The radio sky harbours both galactic and extragalactic sources of arcminute- to degree-scale emission of various physical origins. To discover extragalactic diffuse emission in the Cosmic Web beyond galaxy clusters, one must image low–surface brightness structures amidst a sea of brighter compact fore-…

Nieuwe krachtige telescopen, zoals de European Extremely Large Telescope, zullen de atmosferen van aardachtige planeten gaan ontrafelen met behulp van nieuwe waarneemmethoden zoals onder ontwikkeling in Leiden. Zuurstof kan dan mogelijk als eerste bewijs dienen voor buitenaards leven.

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

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

Even though more than 4000 extra-solar planets are known today, only a small fraction of these has been captured in an image. To better understand the planet formation mechanisms in solar-like environments we started the Young Suns Exoplanet Survey (YSES).

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.

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

Many galaxy clusters exhibit bright diffuse radio emission that traces the underlying structure of the intracluster medium (ICM).

Promotor: J. Aarts

Geometric phases lead to a nontrivial interference result when an electron's different quantum mechanical paths choices encircle a magnetic coil in an Aharonov-Bohm experiment.

By growing in a soil plants change the biotic and abiotic properties of the soil in which they grow.

The recently introduced nature-originated deep eutectic solvents, so-called natural deep eutectic solvents (NADES) are considered as truly green solvents, which composed of natural ingredients found abundantly in organisms.

The challenge of achieving fast quantification in metabolomics is the presence of severe matrix effects during the MS analysis of complex samples.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

Promotor: S.M. Verduyn Lunel

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.

The thesis mainly contributes to the characterization of Majorana fermions as they appear in the Condensed Matter context.

Promotor: Prof.dr. M. Ubbink

This thesis presents the results of a study on the interfaces of insulating oxides with and without the insertion of a magnetic layer.

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

Promotor: T. H. Oosterkamp

Faciliteiten waar LIBC leden gebruik van kunnen maken (in het Engels):

In this work, we investigate the minute circular dichroism effects of single nanoparticles.To this aim, we apply photothermal imaging with a polarization-modulated heating beam.

Hoogleraar Vorming van sterrenstelsels Joop Schaye verscheen in het NRC over de tot dusver onzichtbare gloed die het hele heelal verlicht. Hij was onderdeel van een internationaal team van astronomen dat deze ontdekking publiceerde in vakblad Nature.

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

Een team bestaande uit de Leidse astronomen Tiffany Meshkat en Matthew Kenworthy heeft met behulp van ESO’s Very Large Telescope een zwak object in beeld gebracht dat met een heldere ster mee beweegt. Met een geschatte massa van vier of vijf keer die van Jupiter zou het de minst zware planeet buiten…