1,762 search results for “quantum mechanics” in the Public website
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Low energy electron transmission through layered materials and chiral organic films
In this Ph.D. thesis we study the interaction of low energy electrons with thin materials, namely layered materials (graphene, hexagonal boron nitride, molybdenum disulfide) and organic films. At these low energies the quantum mechanical wavelength of the electron wave function is in the order of a…
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Segments and rules: a comparative study into the computational mechanisms underlying language acquisition
In this project we study the properties of statistical- and rule-learning mechanisms in relation to the acquisition and evolution of language. We ask to what extent these mechanisms are unique to humans - or to human language - by comparing the acquisition of vocal structure in two species: humans (infants)…
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the Process of Bacterial Cell Death: Novel Antimicrobials and Their Mechanisms of Action
This thesis describes the antimicrobial discovery strategy developed in our group, the den Hertog Group at the Hubrecht Institute. It includes a cultivation-based screening approach for novel antimicrobial agents from the source of fungi, and a bacterial time-lapse imaging approach for antimicrobial…
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Random walks on Arakelov class groups
The main topic of this PhD thesis is the Arakelov ray class group of a number field, an algebraic object that contains both the ideal class group structure and the unit group structure.
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Segments and rules: a comparative study on linguistic rule learning mechanisms
A central and much debated topic in the study of language acquisition concerns the nature of the learning mechanisms that are required. Are the computational and learning mechanisms that guide learning about language structure special and specific to language or humans?
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Capacity to Health Emergencies: Insights from EU Crisis Management Mechanisms
Despite an increased EU role in the preparedness, monitoring and coordination of health emergencies over the past two decades, Member States’ responses to the first wave of COVID-19 were surprisingly uncoordinated. In light of calls to improve cooperation regarding future health emergencies, this article…
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A time-space translation mechanism for patterning the vertebrate anteroposterior axis
My PhD project studies how the temporally sequential Hox gene expression is regulated during head-tail patterning of the frog embryo.
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Developing quantum software with a grant of 18.8 million euros
The first larger quantum computers will soon be available. These computers need new software. Researchers at Leiden University have been awarded a Gravitation grant to develop the necessary software. They will be collaborating with colleagues from other research institutions.
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Freedom of additional signals on genes: on the combination of DNA mechanics, genetics and translation speed
DNA carries various forms of information. Out of these forms of information the most well-known is classical genetic information.
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Major NWO subsidies for research on dark matter and quantum experiments
Astronomer Koen Kuijken and physicist Tjerk Oosterkamp have each been awarded a major subsidy by NWO. The funding will allow them to construct new research facilities.
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PhD: Modeling the mechanical regulation of plant development and regeneration (1.0 FTE)
Science, Mathematical Institute (MI)
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Setup: Low Temperatures
A lot of our research is performed at temperatures close to absolute zero, among other reasons because this increases the sensitivity of the measurements.
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Unraveling the auxin mechanism in 2,4-D induced somatic embryogenesis in Arabidopsis thaliana
Promotor: P. J. J. Hooykaas, Co-promotor: R. Offringa
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Do fungi differ? Understanding the mechanisms of mycorrhizal fungal impacts on soil C sequestration
How presence, abundance and enzymatic activities of AM and EM fungi differently affect soil carbon sequestration processes?
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Exploring and exploiting the mechanism of mycelial pellet formation by Streptomyces
Promotor: G.P. van Wezel
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Magnetic imaging of spin waves and magnetic phase transitions with nitrogen-vacancy centers in diamond
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.
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Taking control of charge transfer: strategic design for solar cells
Promotor: Huub J.M. de Groot, Co-promotor: Francesco Buda
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Exploring the mechanism of targeted nanoparticle-mediated drug delivery using the zebrafish model
Exploring the mechanism of targeted nanoparticle-mediated drug delivery using the zebrafish model
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Mechanisms and consequences of horizontal gene transfer in cell wall-deficient cells of Kitasatospora viridifaciens
The bacterial cell wall is a nearly universal structure that offers protection and gives the cell its shape. However, environmental stressors, such as cell wall-targeting antibiotics and hyperosmotic conditions, can induce bacteria to shift to a wall-deficient state. It is unknown whether the lack of…
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Plasmonic enhancement of one-photon- and two-photon-excited single-molecule fluorescence by single gold nanorods
This thesis is a collection of experimental attempts to enhance photoluminescence of fluorescent molecules and quantum dots with single gold nanorods (GNRs) and relevant applications.
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Theorie van fermion-pariteit-omkeringen in supergeleiders
Majorana meets a mermaid
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Chemokine signaling mechanisms underlying inflammation and infection control: insights from the zebrafish model
This thesis focuses on the role of chemokine receptors CXCR3 and CCR2 in the inflammatory process and infection control using the zebrafish model.
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Artificial Intelligence learns faster with quantum technology
An international collaboration, including Leiden physicist and computer scientist Vedran Dunjko, showed that quantum technology can speed-up the learning process of artificial intelligence (AI). To prove this, the physicists and computer scientists used a quantum processor for single photons. Their…
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Noonan and LEOPARD syndrome in zebrafish: molecular mechanisms and cardiac development
Promotor: Prof.dr. J. den Hertog
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Countering Terrorist Narratives: Assessing the Efficacy and Mechanisms of Change in Counter-narrative Strategies
This study presents the findings of a laboratory-based experiment testing hypothesised processes implicated in the prevention of violent radicalisation through counter-narratives. The central aims of the study were to contribute to counter-narrative theory, whilst highlighting the value of experimental…
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High throughput microscopy of mechanism-based reporters in druginduced liver injury
Promotor: B. van de Water
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Zebrafish xenograft model: identification of novel mechanisms driving prostate cancer metastasis
Prostate cancer (PCa) is one of the most prevalent cancer in males.
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In vitro investigation of the photoprotection mechanism of Light Harvesting Complex II
Solar energy is used by photosynthetic organisms to drive energy required cellular processes. Is absorbed by two groups of pigments, located in the LHCs.
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Unraveling the mechanism of multicopper oxidases: from ensemble to single molecule
Promotores: Prof.dr. G.W. Canters, Prof.dr. T.J. Aartsma
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Cognitive control in context: Neural, functional, and social mechanisms of metacontrol.
To argue that people can control the relative contributions of goal-driven and stimulus-driven processes to decision-making and action selection.
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induces an anti-inflammatory effect: in vivo studies and molecular mechanism of action
Source: Mediators Inflamm (2014)
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The development of the speech production mechanism in young children: evidence from the acquisition of onset clusters in Dutch
On October 31st, Margarita Gulian succesfully defended her doctoral thesis and graduated. The Leiden University Centre for Linguistics congratulates Margarita on this great result.
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Rediscovering the lost pedal techniques on harps with a single‐action pedal mechanism
The “harpe organisée”, 1720-1840: Rediscovering the lost pedal techniques on harps with a single-action pedal mechanism, is the title of Maria Christina Cleary's PhD thesis. This is the first monographic study on harp pedal techniques, tracing the historical way to pedal on the early pedal harps with…
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Bachelor Projects
Bachelor projects are available in
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Workshop Exploring the Role of Hype in the Future of Quantum Technology
Telling sensationalised stories, exaggerating benefits and understating the risks: creating ‘hype’ about something doesn't sound like something a responsible scientist would indulge in. Or could we also use hype in a ‘good way'? What could we achieve by opening up quantum futures for wider discussions,…
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Copper(II) Tris(2‐pyridylmethyl)amine Complex through a Stepwise Mechanism
The mechanism of the electrochemical reduction of dioxygen by a mononuclear pyridylalkylamine copper complex was investigated (see picture). It was shown that in neutral aqueous solution dioxygen undergoes stepwise reduction, wherein hydrogen peroxide plays a key role. The rate constants determined…
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Awards and Grants 2022
An overview of awards and prizes granted to our staff and students in 2022, as well as special appointments at Leiden University and other institutions.
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Felix Frohnert
Science
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Vincent Croft-
Science
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Dunja Wackers
Science
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Julia Cramer
Science
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Towards nano-MRI
By detecting the tiny forces between a micrometer sized magnet and the spins of hydrogen nuclei, we can do MRI with a volume resolution that is approximately 12 orders of magnitude better than a conventional MRI.
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Dirk Bouwmeester and Corinne Hofman receive NWO Spinoza Prize
On 9 September, in the presence of King Willem Alexander, Secretary of State Sander Dekker presented the Spinoza Prize to four researchers, including two researchers from Leiden: archaeologist Corinne Hofman and physicist Dirk Bouwmeester. In the Nieuwe Kerk in The Hague, they unveiled their plans for…
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Simon Marshall
Science
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Vincent Koeman
Science
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Transport coefficients and low energy excitations of a strongly interacting holographic fluid
In this thesis, classes of strongly interacting quantum field theories, have been studied.
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Prominent physicist Maldacena gives Ehrenfest Colloquium
On November 21, theoretical physicist Juan Maldacena gives the Ehrenfest Colloquium. Maldacena is known worldwide as the inventor of AdS/CFT correspondence, which might be key to a theory of quantum gravity. Maldacena is winner of the prestigious Dirac Prize and the Breakthrough Prize in Fundamental…
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Important Effect Observed in Development of Quantum Storage
Rare-earth materials are prime candidates for storing quantum information, because the undesirable interaction with their environment is extremely weak. Consequently however, this lack of interaction implies a very small response to light, making it hard to read and write data. Leiden physicists have…
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‘The first quantum computer will fill a sports hall’
The worldwide race to the quantum computer is in full swing. This computer can bring about a breakthrough in discovering medicines and new materials. Leiden researchers, together with the TU Delft, are taking part in the race. There is now a dossier online about their work.
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Modeling energy conversion dynamics at interfaces
Chemical reactions go hand-in-hand 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,…