Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 69 for “"Single ion"”.
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Single Ion Detection in Nanotube Nanofluidics
This dissertation demonstrated the application of organic color center (OCC)-functionalized (6,5) single-walled carbon nanotubes (SWCNTs) to detect proton diffusion in nanofluidic systems at the single-ion level. I first developed a method to encapsulate SWCNTs between two layers of Parylene-C, a …
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A single ion inside a miniature cavity
… the first experimentally achieved coupling of a single atomic ion to an optical fibre-cavity as well as the first photonic interaction between a single ion and a single semiconductor quantum dot. The newly developed apparatus stores a single Yb+ ion in a radio-frequency Paultrap. There the ion is …
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Mass spectroscopy using single ion cyclotron resonance
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1990.
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Improved single ion cyclotron resonance mass spectroscopy
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1993.
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A Trapped Single Ion Inside a Bose-Einstein Condensate
In recent years, improved control of the motional and internal quantum states of ultracold neutral atoms and ions has opened intriguing possibilities for quantum simulation and quantum computation. Many-body effects have been explored with hundreds of thousands of quantum-degenerate neutral atoms …
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Silicon nanopore patch clamp device for measuring single ion channel activity
… neural activity is of high interest with applications in neuron and neural circuit functioning as well as high-throughput ion channel screening for early drug development research. In 1991 Erwin Neher and Bert Sakmann received the Nobel Prize for their invention of the patch clamp, which is based …
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PRECISION MEASUREMENT TO STUDY STRONGLY CORRELATED SYSTEMS-FROM A SINGLE ION TO PHONONS IN AN ION CHAIN
Emulation of isolated strongly correlated quantum many-body systems has been a subject of intense experimental and theoretical research in recent years. Trapped ions are well-controlled quantum systems and the ideal choice for studying the strongly correlated systems to unfold the correlated …
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Towards single Ce ion detection in a bulk crystal for the development of a single-ion qubit readout scheme
… the relevant spectroscopic properties of Ce ions randomly doped in an Y2SiO5 crystal at low temperatures (around 4 K), in order to develop a technique and an experimental set-up to detect the fluorescence photons emitted by a single Ce ion. The aim of the work was to determine whether a …
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Ion Implantation Damage in Solids
Ion induced surface smoothing and roughening processes were studied using Molecular Dynamics (MD) computer simulation. The simulations on self-ion bombarded W showed the effect of the surface on defect production and the roughening of the surface. The simulations on the CuTi, Ag and Ni with …
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Competitive Adsorption of Arsenite and Silicic Acid on Goethite
The adsorption behavior of silicic acid and arsenite alone and competitively on goethite over a broad pH range (3-11) at environmentally relevant concentrations was investigated utilizing pH adsorption data and zeta potential measurements. Both addition scenarios (Si before As(III) and As(III) …
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Incoherent scatter modeling of Jicamarca radar spectra
… density irregularities of the topside equatorial ionosphere probed by the Jicamarca Incoherent Scatter Radar (ISR) located near Lima, Peru. The topside equatorial ionosphere is a multi-ion plasma and the spectrum of its electron density irregularities can be modeled by extending the single-ion …
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Hochauflösende Spektroskopie gespeicherter Indium Ionen
New Results in cooling and storing single Indium ions are presented. Cooling almost to the ground state of the trapping potential could be demonstrated for a single ion as well as for a two-ion coulomb-crystal. In high-resolution spectroscopy the narrow-bandwidth clock-transition was measured with …
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Quantum Simulation of Spin-1 Physics with Bosons in Optical Lattice
… A topic at the frontier of quantum simulation with Mott insulators is the study of quantum spin models, which are intimately connected to other modern research topics such as the study of quantum phase transitions and quantum thermalization. While quantum spin models are also realized and …
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Surface Friction and Spectroscopic Probes of New Physics with Trapped Ions
To trap a single ion under vacuum is to control a microscopic, isolated quantum laboratory. This thesis describes two research programs made possible by single-ion trapping of Yb⁺. The first program is a study of a paradigmatic frictional interface: a trapped ion transported along a one-dimensional …
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Lumineszenz durch hochenergetische Atom- und Clusterionen: Untersuchung an dünnen Schichten
Die durch Atom- und Clusterionen mit Anfangsenergien im MeV-Bereich in dünnen Schichten induzierte Lumineszenz wurde untersucht und dabei das Messprinzip des 'single ion hitting single photon counting' eingesetzt. Durch Verwendung von Proben mit Schichtdicken von 50 Nanometern bis ca. 3 Mikrometern …
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New concepts in energy and mass transport within carbon nanotubes
… explored for energy transport in next-generation, such as light-emitting diodes, field-effect transistors, and phonon wave guides due to their high axial electrical and thermal conductivity. Also, their subnanometer scale with atomically smooth surfaces is promising for selective mass …
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An ultraviolet fibre-cavity for strong ion-photon interaction
We investigate the coupling of a single trapped ion to a miniature optical cavity operating in the ultraviolet. Our cavity provides a source of single photons at a high rate into a single spatial mode. Using our apparatus, we have demonstrated the highest atom-cavity coupling rate achieved with a …
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Magnetochemische Analyse und Modellierung von d N -, 4f 7 - und 5f N -Systemen mit dem Computerprogramm CONDON
This work provides a detailed investigation of the magnetism of homonuclear and exchange-coupled transition metal compounds as well as lanthanide and actinide systems. The measurement of the magnetic susceptibility was performed by means of a SQUID magnetometer in the temperature range between …
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Noise Optimization for High-Bandwidth Ion Channel Recordings
Single-molecule measurements often exhibit weak signals and fast kinetics, making them particularly challenging to record with high fidelity. This thesis presents an analysis of voltage-clamp current recordings of single ion channels, and concludes that considerable improvements in signal-to-noise …
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Investigation of the magnetic and magnetocaloric properties of complex lanthanide oxides
… phases of matter, while also providing functionality for practical applications. In this dissertation, the structural, magnetic and magnetocaloric properties of three families of lanthanide oxides have been studied with the dual aims of investigating the magnetic behaviour and identifying …
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