286 zoekresultaten voor “dark matter” in de Publieke website
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Semonti Bhattacharyya
Wiskunde en Natuurwetenschappen
bhattacharyya@physics.leidenuniv.nl | +31 71 527 5913
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On topological properties of massless fermions in a magnetic field
Make more fluid: In condensed matter systems, electrons can acquire unusual properties from their interaction with the atomic lattice.
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On shape and elasticity: bio-sheets, curved crystals, and odd droplets
Because thin systems can deform along the thickness with relative ease, the interplay between surface mechanics and geometry plays a fundamental role in sculpting their three-dimensional shape.
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Probing Gravity at Cosmic Scales
The theoretical explanation of cosmic acceleration is nowadays one of the biggest puzzles in cosmology.
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Vincenzo Vitelli benoemd tot hoogleraar Theory of Condensed Matter
Vincenzo Vitelli is per 1 juni 215 benoemd tot hoogleraar Theory of Condensed Matter.
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Summer school: Things that Matter (Groningen, June 2024)
In June 2024, the University of Groningen organizes a summer school, titled "Things that Matter". The Summer School explores challenges in digitizing source materials, questioning distinctions between physical and digital copies. It delves into the impact of virtual collections and criteria for digitization,…
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Black lives matter: waarom het Amerikaanse protest in Nederland resoneert
De directe aanleiding was de dood van George Floyd door politiegeweld, maar de Black Lives Matter-betogingen in de Verenigde Staten en hier in Nederland gaan over veel meer dan dat. We vroegen Karwan Fatah-Black, historicus op het gebied van de Nederlandse slavernijgeschiedenis, naar zijn analyse. ‘We…
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eV-TEM: Transmission Electron Microscopy with few-eV Electrons
Electron microscopy has become an extremely important techniquein a wide variety of elds.
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Marie Curiebeurs voor donkere materie
De Leidse Sterrewacht gaat een nieuwe techniek gebruiken om te rekenen aan zwaartekrachtlenzen. Zij doen dit in het kader van onderzoek naar de vorming van melkwegstelsels. Alessandro Sonnenfeld van de Universiteit Tokyo haalde een Marie-Curie beurs binnen en komt het onderzoeksteam versterken.
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Assembling anisotropic colloidal building blocks
This PhD-thesis presents a study on micron-sized particles, so-called colloids. By controlling the chemical and physical properties of these particles, such as the interparticle interaction and the particles’ shape, colloids can act as building blocks that self-assembly into larger structures.
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Gast lezing door Ernst Worrell over: "Material Matter: Connecting Energy and Material Efficiency"
Op Dinsdag 10 Maart 2015 - 10h zal Ernst Worrell, professor aan de Universteit Utrecht met een leerstoel op
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Tangent fermions: massless fermions on a lattice
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.
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Strategies for braiding and ground state preparation in digital quantum hardware
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.
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Black lives matter: ‘Racisme bestaat in allerlei vormen, maar is een wereldwijd probleem'
Het begon met betogingen vanwege de dood van George Floyd door politiegeweld in Minneapolis, maar de Black Lives Matter-protesten verspreiden zich snel over heel Amerika. Dagelijks gaan door heel het land duizenden mensen de straat op. We vroegen Amerika-deskundige Sara Polak hoe dat komt. ‘Na Ferguson…
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Synthetic model microswimmers near walls
Synthetic microswimmers take an important place within the interdisciplinary field of active soft matter.
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Fermions and Bosons: Excitons in strongly correlated materials
Promotors: Prof.dr. J. Zaanen, Prof.dr.ir. H. Hilgenkamp
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Superlattices in van der Waals materials: A Low-Energy Electron Microscopy study
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.
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A radio view of dust-obscured star formation
Within the field of astronomy, understanding how galaxies grow and evolve from the Big Bang to the present day is a challenging and complex question.
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Michel Orrit
Wiskunde en Natuurwetenschappen
orrit@physics.leidenuniv.nl | +31 71 527 2727
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Dirk-Jan Kok
Wiskunde en Natuurwetenschappen
d.d.kok@cml.leidenuniv.nl | +31 71 527 2727
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The symmetry of crystals and the topology of electrons
Promotor: J. Zaanen, Co-Promotor: V. Juricic
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Galaxy formation and the structure of the Universe
Promotores: Prof.dr. J. Schaye, Prof.dr. S.D.M. White (MPA Garching)
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Measuring what Matters
Promotie
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Coherent dynamics in solar energy transduction
Promotor: Prof.dr. H.J.M. de Groot, Co-promotor: Francesco Buda
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Molecular electronics: Controlled manipulation, noise and graphene architecture
Atoms and molecules are the basic units of matter. If we keep dividing a bar of gold or a glass of water into smaller parts, at the end we are left with a single gold atom or a water molecule.
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Nature’s peepshow
Wat is de evolutionaire oorzaak van de enorme variatie in de vorm van geslachtsdelen van mensen en dieren? Standjes die mensen bij seks kunnen innemen steken braafjes af tegen de wilde capriolen van sommige dieren. En er zijn dieren met een zingende penis. Wat zeggen onze geslachtsdelen over wie we…
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Betrokkenheid bij pesten en persoonlijkheid
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Non-linear astrochemical kinetics: theory and applications
This Thesis shows discoveries in non-linear astrochemical kinetics as well as a deeper analysis of dark clouds chemistry.
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Applications of topology to Weyl semimetals and quantum computing
This thesis covers various applications of topology in condensed matter physics and quantum information.
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Physics (MSc)
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.
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Vervolgopleidingen
Na het afronden van de bacheloropleiding volgen verreweg de meeste studenten de masteropleiding.
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Dynamics and radiation from tidal disruption events
When a star gets too close to a supermassive black hole, it is torn apart by strong tidal forces in a tidal disruption event (TDE).
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Scattering and absorption in 2D optics
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.
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Geometry and Topology in Active and Driven Systems
The key characteristic of active matter is the motion of an emergent collection (such as a flock of birds), which is driven by the consumption of energy by its active components (i.e. individual birds).
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Visualizing strongly-correlated electrons with a novel scanning tunneling microscope
Materials with strongly correlated electrons show some of the most mysterious and exotic phases of quantum matter, such as unconventional superconductivity, quantum criticality and strange metal phase.
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Size effects in microstructured superconductors and quantum materials
We find ourselves in an era of transition, not just towards a more computing- and data-driven society but also away from unsustainable fossil fuels as an energy source.
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Development matters – Longitudinale ontwikkeling van hersenen en gedrag
Congres/symposium
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Probing quantum materials with novel scanning tunneling microscopy techniques
This thesis described the development of novel scanning tunneling microscopy techniques to investigate strongly correlated electronic states in quantum matter.
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Integer and fractional quantum hall effects in lattice magnets
Promotor: Prof.dr.ir. J.W.M. Hilgenkamp, Prof.dr. J. van den Brink
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Research in Physics, theoretical (MSc)
Deze master specialisatie behandelt een breed scala aan wetenschappelijke onderwerpen, waaronder High Energy Physics and Particle Cosmology, Theoretical Physics of Life Processes en Condensed Matter Theory.
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3D-beweging van sterren in nabij stelsel gemeten
Voor het eerst is het gelukt de driedimensionale beweging van individuele sterren in een sterrenstelsel buiten de Melkweg te meten. Een Gronings-Leidse onderzoek geeft een inkijkje in de verdeling van de donkere materie die het stelsel domineert. Ze publiceren hun bevindingen op 27 november in Nature…
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Zebrafish embryos and larvae as a complementary model for behavioural research
Promotor: Prof.dr. M.K. Richardson
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Collegeserie Duurzaamheid & Recht
collegereeks duurzaamheid en recht
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Into the Darkness: Forging a Stable Path Through the Gravitational Landscape
In this thesis we study the landscape of gravitational models which modify GR by introducing an additional scalar degree of freedom (d.o.f.) to source Cosmic Acceleration.
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Caging ruthenium complexes with non-toxic ligands for photoactivated chemotherapy
The main goal of the research described in this thesis was the development of new photoactivated chemotherapy (PACT) ruthenium(II) complexes bearing a non-toxic photolabile ligand.
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Reconstruction Methods for Combined HAADF-STEM and EDS Tomography
The research in this thesis is focused on tomographic reconstruction based on two imaging modalities in electron microscopy.
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Untangling cosmic collisions: a study of particle acceleration and magnetic fields in merging galaxy clusters
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.
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Functional characterization and unraveling the Gene Regulatory Networks (GRNs) of HD-Zip transcription factor HB40 (and HB22) in Arabidopsis
In this Ph.D. thesis, we characterized two novel upstream regulators of JUB1, HB40, and HB22, in Arabidopsis thaliana. In Chapter 2, we described functions of HB40 in modulating growth and development via the regulation of JUB1 and GA inactivation genes GA2OXs.
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Cybercrime en witwassen; Bitcoins, online dienstverleners en andere witwasmethoden bij banking malware en ransomware
Het witwassen van de gelden die worden verkregen uit cybercrime vindt in toenemende mate plaats met digitale betalingsmiddelen. In dit onderzoek wordt nagegaan hoe deze gelden worden witgewassen, welke actoren een rol spelen en hoe digitale betalingsmiddelen daarbij worden gebruikt.
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Felix Frohnert
Wiskunde en Natuurwetenschappen
f.frohnert@liacs.leidenuniv.nl | +31 71 527 2727