65 search results for “picard lattice” in the Public website

Topics in the arithmetic of del Pezzo and K3 surfaces
Promotores: P. Stevenhagen, L. van Geemen (Università degli studi di Milano), CoSupervisor: Ronald M. van Luijk

Basis reduction for layered lattices
Promotor: H.W. Lenstra

Group representations in Banach spaces and Banach lattices
Promotor: S.M. Verduyn Lunel, Copromotores: M.F.E. de Jeu, B. de Pagter

Enumeration and Simulation of Lattice Polymers as Models for Compact Biological Macromolecules
Promotores: H. Schiessel, G.T. Barkema

Integer and fractional quantum hall effects in lattice magnets
Promotor: Prof.dr.ir. J.W.M. Hilgenkamp, Prof.dr. J. van den Brink

Lattice models for Josephson junctions and graphene superlattices
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.

Groups and fields in arithmetic
Promotor: Prof.dr. H.W. Lenstra

Garnet Akeyr
Wiskunde en Natuurwetenschappen

Dual Complexes of Semistable Varieties
This thesis is comprised of three chapters covering the theme of studying semistable varieties by looking at their dual combinatorial objects.

Travelling patterns on Discrete Media
This thesis describes how complex and realworld relevant analytical solutions can be found starting from a simple Nagumo problem posed on one or twodimensional lattices.

LCN2 Seminar: Dynamics on lattices
Lecture

Piecewise deterministic Markov processes: an analytic approach
Promotor: S.M. Verduyn Lunel, CoPromotores: S.C.Hille, O.W. van Gaans

Enumeration and Simulation of Lattice Polymers as Models for Compact Biological Macromolecules
PhD Defence

Lattice models for Josephson junctions and graphene superlattices
PhD Defence

Invariant manifolds and applications for functional differential equations of mixed type
Promotor: S.M. Verduyn Lunel

Surface plasmon lasers
Surface plasmons (SPs) are surface waves at the interface between a dielectric and a good metal, and are formed by the interaction between light and the free electrons at the metaldielectric interface. They provide strong field confinement for optical fields, opening new possibilities for enhanced…

Random walks in dynamic random environments
Promotor: W.Th.F. den Hollander

Discrete tomography for integervalued functions
Promotor: S.J. Edixhoven, Copromotor: K.J. Batenburg

Gauss's theorem on sums of 3 squares, sheaves, and Gauss composition
Promotor: Bas Edixhoven, Promotor: Qing Liu

Xray refinement significantly underestimates the level of microscopic heterogeneity in biomolecular crystals
Biomolecular Xray structures typically provide a static, time and ensembleaveraged view of molecular ensembles in crystals. In the absence of rigidbody motions and lattice defects, Bfactors are thought to accurately reflect the structural heterogeneity of such ensembles.

Extension of Operators on PreRiesz Spaces
This thesis mainly extends the theory of positive operators on Riesz spaces to a setting of preRiesz spaces.

Spinmomentum locking in oxide interfaces and in Weyl semimetals
Electrons in a crystal lattice have properties that may differ from those of a free electron in vacuum.

Unconventional fabrication of 2D nanostructures and graphene edges
In this work, we illustrate unconventional approaches towards the fabrication of edge functionalized graphene nanostructures and bidimensional architectures in polymeric and metallic supports, with an outlook towards molecular sensing devices.

Supramolecular polymer materials for biomedical applications and diagnostics
Selfassembly is an abundant process in nature and is vital to many processes in living organisms.

Ab initio molecular dynamics calculations on reactions of molecules with metal surfaces
Promotor: Prof.dr. G.J. Kroes

Chemical functionalization of the graphene surface for electrical and electrochemical sensing application
Advanced sensing techniques require graphene with high quality and wellcontrolled surface chemistry.

Dynamical GibbsnonGibbs transitions: a study via coupling and large deviations
Promotores: F.H.J. Redig, W.T.F. den Hollander

Science Friction (SciFri)
How is energy really dissipated on the atomic scale when sliding objects slip over a single lattice spacing?

VARIS
When does it rain when air is oversaturated with moisture? How does an infection spread among the population? The problems that mathematician Professor Frank den Hollander tries to solve come from physics, chemistry and biology.

Metastability for lowtemperature Kawasaki dynamics with two types of particles
Promotor: W.Th.F. den Hollander, Copromotor: F.R. Nardi

Modeling energy conversion dynamics at interfaces
Chemical reactions go handinhand with an energy exchange with the environment in which they take place. Surfaces offer a variety of energy dissipation channels, constituted by the nuclear and electronic degrees of freedom of the atoms at the interface. Aiming at an improved future harvesting of energy,…

The origins of friction and the growth of graphene, investigated at the atomic scale
Promotor: J.W.M. Frenken

Modeling energy conversion dynamics at interfaces
Chemical reactions go handinhand with an energy exchange with the environment in which they take place. Surfaces offer a variety of energy dissipation channels, constituted by the nuclear and electronic degrees of freedom of the atoms at the interface. Aiming at an improved future harvesting of energy,…

Inverse Jacobian and related topics for certain superelliptic curves
To an algebraic curve C over the complex numbers one can associate a nonnegative integer g, the genus, as a measure of its complexity.

Melting of frozen electrons visualized
For the first time, physicists have visualized the ‘melting’ of electrons inside a special class of insulators. It allows electrons to move freely and turns the insulator into a metal and possibly later into a superconductor. Publication in Nature Physics.

The symmetry of crystals and the topology of electrons
Promotor: J. Zaanen, CoPromotor: V. Juricic

Positive representations of algebras of continuous functions
If X is a locally compact Hausdorff space, then a representation of the complex C* algebra C_0(X) on a Hilbert space $H$ is given by a spectral measure that takes its values in the orthogonal projections on $H$.

Ultrathin material absorbs all the light
It appears to be a paradox: ultrathin material that absorbs all the incident light. Nonetheless, it does exist. Two Leiden researchers report on their research in ‘Applied Physics Letters’. The article is among the Top 20 of the most downloaded articles of this reputable journal in May.
 Jan van Ruitenbeek Lab

Surprising similarity between stripy black holes and hightemperature superconductors
We don’t understand how some materials become superconducting at relatively high temperatures. Leiden physicists have now found a surprising connection with auxiliary black holes. It enables us to use our knowledge of black holes on the mystery of hightemperature superconductivity. Publication in Nature…

Cryptanalysis research of prof. Ronald Cramer in WIRED
The American magazine WIRED recently published an article on ‘quantumsafe public key encryption’.

A mathematical shoetying award
Knots come in all shapes and sizes: mariners and scouts can vouch for this. Sjabbo Schaveling will obtain his PhD on 1 September for a mathematical method to distinguish between all these knots. ‘I flatten them to a pretzel.’

Joan van der Waals colloquium
Lecture

Waves and Patterns in Discrete Media: Bridging the Gaps
What happens to electrical waves that have to cross gaps in insulation material around nerves in the human body

The mathematical ties between South Africa and Leiden: Marcel de Jeu professor by special appointment at the University of Pretoria
A longterm mathematical collaboration between South Africa and Leiden will continue with the appointment of Marcel de Jeu as professor by special appointment at the University of Pretoria. He will be working in the field of Positivity.

Catalysts contribute their own oxygen for reactions
A catalyst: normally a substance that speeds up a chemical reaction, without adding molecules to this reaction. Scientists from the group of Prof. Marc Koper of Leiden University and Prof. Yang ShaoHorn of MIT now discovered that in specific reactions that need oxygen, catalysts called metal oxides…

Leiden physicists image lumpy superconductor
Hightemperature superconductivity is one of the big mysteries in physics. Milan Allan’s research group used a Josephson Scanning Tunneling Microscope to image spatial variations of superconducting particles for the first time, and published about it in the journal Nature.

Seminars
LCN2 organizes seminars on the last Friday of each month.

This Week’s Discoveries  27 September 2016
Lecture

Theses
Full texts of all bachelor, master and PhD theses are available on this site