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 45 for “"trapped ions"”.
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Detecting single, trapped ions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1988.
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Interaction of trapped ions with trapped atoms
… collision studies between cold atoms and cold ions, and the Cavity-Array trap for studying the interaction between ionic ensembles and photons. The Atom-Ion trap overlaps a surface-planar ion trap with a magneto-optical trap (MOT) for neutral atoms. The initial results of this system were …
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Quantum gates, sensors, and systems with trapped ions
… promises a host of new and useful applications in communication, simulation, and computational algorithms. Trapped atomic ions are one of the leading physical systems with potential to implement a large-scale quantum information system, but many challenges still remain. This thesis …
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Probing New Physics with Spectroscopy of Trapped Ions
… can violate an SM prediction: linear distributions of measured isotope shifts (ISs) mapped onto graphs called King plots [1, 2, 3]. The prediction can be tested purely experimentally. If the violation is observed, however, possible new-physics contribution has to be distinguished from …
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An Electron Target for Collision Experiments with Trapped Ions
An Electron Target for Collision Experiment with Trapped Ions An experiment to study electron collisions on stored molecular ions has been built within the framework of this thesis. Ions are stored in a trap with a kinetic energy of several keV between two electrostatic mirrors. The stored ions are …
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Friction under microscope with trapped ions in optical lattices
… systems with increasingly stronger interactions. One goal is to emulate condensed-matter phenomena in an ultimately controlled system by studying the motion of atoms in optical lattices. Trapped ions are the epitome of a strongly-interacting cold-atom system, but until now have been limited …
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Integrated optical quantum manipulation and measurement of trapped ions
Individual atomic ions confined in designed electromagnetic potentials and manipulated via lasers are strong candidates as physical bases for quantum information processing (QIP). This is in large part due to their long coherence times, in distinguishability, and strong Coulomb interactions. Much …
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Optimizing Quantum Annealing for Trapped Ions: Performance, Resources, and Noise Mitigation
… these challenges along two complementary directions, using trapped-ion hardware based on the Magnetic Gradient Induced Coupling (MAGIC) scheme as a reference architecture. On the hardware side, we analyze the MAGIC setup beyond its standard leading-order description, computing higher-order …
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Integrated-Photonics Devices and Architectures for Advanced Cooling of Trapped Ions
Integrated-photonics-based architectures for trapped-ion systems offer a potential avenue for improved fidelity and addressability of ion arrays. Motional state cooling, a key optical function in trapped-ion systems, however, has been limited to Doppler and resolved-sideband cooling in …
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Surface Friction and Spectroscopic Probes of New Physics with Trapped Ions
… study of a paradigmatic frictional interface: a trapped ion transported along a one-dimensional multistable energy landscape formed by a periodic, corrugated optical potential and a harmonic electric trapping potential. Two regimes of friction behavior are differentiated: single-slip (whereby an …
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Effects of electrode surface roughness on motional heating of trapped ions
… noise is a major source of motional heating in trapped ion quantum computation. While the influence of trap electrode geometries on electric field noise has been studied in patch potential and surface adsorbate models, only smooth surfaces are accounted for by current theory. The effects of …
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Integrated chips and optical cavities for trapped ion quantum information processing
… - which provides a provably secure communications protocol. Trapped ions show much promise for achieving large-scale quantum information processing. Experiments thus far have demonstrated small algorithms and entanglement of two remote ions. Current work focuses on scaling to large numbers of …
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Atomic and molecular ions with photon resonators for quantum information science
… of laser-atom interaction, systems of trapped ions offer a promising platform for the realization of fault-tolerant quantum information processing (QIP). Much progress with single atomic and molecular ion qubits has been made both in theory and experiment on the fundamental building …
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Experiments towards mitigation of motional heating in trapped ion quantum information processing
Trapped ions are a promising candidate for the implementation of quantum information processing. Techniques have already been developed for working with small systems of trapped-ion qubits; scalability is the biggest remaining challenge. One of the major scalability obstacles faced by trapped ions …
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Improving Scalability of Trapped-Ion Quantum Computers Using Gate-Level Techniques
<p>Trapped ions provide a promising platform to build a practical quantum computer. Scaling the high performance of small systems to longer ion chains is a technical endeavor that benefits from both better hardware system design and gate-level control techniques. In this thesis, I discuss our work …
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PRECISION MEASUREMENT TO STUDY STRONGLY CORRELATED SYSTEMS-FROM A SINGLE ION TO PHONONS IN AN ION CHAIN
… 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 physics. In this thesis, both theoretical and experimental studies on a strongly correlated system have been …
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Motional state engineering for continuous-variable quantum computation
… numerical values belong to continuous intervals. Trapped ions are well-developed for quantum computation, and they possess both qubit and continuous degrees of freedom that can be precisely controlled, making them a good candidate for a realization of CVQC. Although there exist software frameworks …
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Fiber optic integration in planar ion traps
… tools in atomic physics for studying single ions. Accurate measurement of the ion's electronic state in these ion traps is required by both atomic clocks and quantum computation. Quantum computation with trapped ions can only scale to larger numbers of qubits if the ion traps and their laser …
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Sensitive, 3D micromotion compensation in a surface-electrode ion trap
Following successful demonstrations of quantum algorithms and error correction with a handful of trapped ions in a macroscopic, machined Paul trap, there is a growing effort to move towards microfabricated traps with all the electrodes on a single chip. These traps, known as surface-electrode ion …
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Dynamics of quantum many-body systems with long-range interactions
… of ultracold atoms in optical lattices and trapped ions make them one of the most promising candidates for quantum simulation and quantum computation in the near future, and open new opportunities for study many-body physics. Out-of-equilibrium properties of such complex systems present …
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