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Investigation Of Coherent Microscopic Defects Inside The Tunneling Barrier Of A Josephson Junction
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Book Synopsis Investigation of coherent microscopic defects inside the tunneling barrier of a Josephson junction by : Grabovskij, Grigorij Jurevic
Download or read book Investigation of coherent microscopic defects inside the tunneling barrier of a Josephson junction written by Grabovskij, Grigorij Jurevic and published by KIT Scientific Publishing. This book was released on 2014-08-07 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: In disordered solids, two-level atomic-tunneling systems are present in large quantity. Only recently, superconducting qubits opened a door for a detection and individual coherent manipulation of such microscopic quantum systems. We succeeded to tune the resonance frequencies of these systems by applying external strain on the qubit chip. Moreover, we observed and analyzed the interaction between two coupled tunneling systems.
Book Synopsis Investigation of Coherent Microscopic Defects Inside the Tunneling Barrier of a Josephson Junction by : Grigorij Jur'evic Grabovskij
Download or read book Investigation of Coherent Microscopic Defects Inside the Tunneling Barrier of a Josephson Junction written by Grigorij Jur'evic Grabovskij and published by . This book was released on 2020-10-09 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: In disordered solids, two-level atomic-tunneling systems are present in large quantity. Only recently, superconducting qubits opened a door for a detection and individual coherent manipulation of such microscopic quantum systems. We succeeded to tune the resonance frequencies of these systems by applying external strain on the qubit chip. Moreover, we observed and analyzed the interaction between two coupled tunneling systems. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
Book Synopsis Electroluminescence from Plasmonic Excitations in a Scanning Tunnelling Microscope by : Edelmann, Kevin
Download or read book Electroluminescence from Plasmonic Excitations in a Scanning Tunnelling Microscope written by Edelmann, Kevin and published by KIT Scientific Publishing. This book was released on 2019-07-03 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents the design and commissioning of a new low-temperature Scanning Tunnelling Microscope equipped with an innovative light collection setup using an integrated, micro-fabricated mirror tip. Commissioning experiments demonstrate the capabilities of this new instrument and reproduce known effects regarding gap plasmons on noble-metal surfaces. Furthermore, different contrasts in the plasmon-mediated light emission from Cobalt nano-islands on a Copper (111) substrate are reported.
Book Synopsis Quantum Tunneling of Josephson Vortices in High-Impedance Long Junctions by : Wildermuth, Matthias Micha
Download or read book Quantum Tunneling of Josephson Vortices in High-Impedance Long Junctions written by Wildermuth, Matthias Micha and published by KIT Scientific Publishing. This book was released on 2023-09-11 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decades, superconducting devices have emerged as a promising platform for quantum technologies, including quantum sensing and quantum computing. Their key elements are Josephson junctions, which allow for coherent supercurrent tunneling between two weakly linked superconductors. If such a junction is extended in one direction to a long junction, the superconducting phase difference can vary in space and time and may allow for quantized phase windings that drive supercurrent vortices.
Book Synopsis Resolving locations of defects in superconducting transmon qubits by : Bilmes, Alexander
Download or read book Resolving locations of defects in superconducting transmon qubits written by Bilmes, Alexander and published by KIT Scientific Publishing. This book was released on 2019-12-09 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Magnetic Adatoms with Scanning Tunneling Techniques by : Maerkl, Junji Tobias
Download or read book Investigation of Magnetic Adatoms with Scanning Tunneling Techniques written by Maerkl, Junji Tobias and published by KIT Scientific Publishing. This book was released on 2016-01-20 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, magnetic atoms on surfaces are studied with low-temperature scanning tunneling microscopy. Motivated by the idea to use single atoms as magnetic bits, the factors that allow or prevent long-term stability of their magnetic moments are investigated. Lifetimes of up to several minutes can be achieved for the magnetic moments of holmium atoms on a Pt(111) surface, resulting from the combined symmetries of the system. Corresponding theoretical calculations are presented and evaluated.
Book Synopsis Light Emission from Single Self-decoupled Molecules in a Scanning Tunnelling Microscope by : Rai, Vibhuti Narayan
Download or read book Light Emission from Single Self-decoupled Molecules in a Scanning Tunnelling Microscope written by Rai, Vibhuti Narayan and published by KIT Scientific Publishing. This book was released on 2022-10-04 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, a clear pathway is presented to achieve well-defined electronically decoupled chromophores from metallic leads without requiring additional insulating layers. To study such self-decoupled molecules, STM equipped with an efficient light detection setup has been used. Results show that the chromophores mounted on tripodal molecular platforms adsorbed on a gold surface present well-defined and efficient electroluminescence down to the single-molecule level.
Book Synopsis Elastic and Inelastic Scanning Tunneling Spectroscopy on Iron-Based Superconductors by : Jandke, Jasmin Maria
Download or read book Elastic and Inelastic Scanning Tunneling Spectroscopy on Iron-Based Superconductors written by Jandke, Jasmin Maria and published by KIT Scientific Publishing. This book was released on 2019-05-02 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Schackert, Michael PeterScanning Tunneling Spectroscopy on Electron-Boson Interactions in Superconductors by : Schackert, Michael Peter
Download or read book Schackert, Michael PeterScanning Tunneling Spectroscopy on Electron-Boson Interactions in Superconductors written by Schackert, Michael Peter and published by KIT Scientific Publishing. This book was released on 2015-03-23 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work describes the experimental study of electron-boson interactions in superconductors by means of inelastic electron tunneling spectroscopy performed with a scanning tunneling microscope (STM) at temperatures below 1 K. This new approach allows the direct measurement of the Eliashberg function of conventional superconductors as demonstrated on lead (Pb) and niobium (Nb). Preparative experiments on unconventional iron-pnictides are presented in the end.
Book Synopsis Granular aluminium superinductors by : Grünhaupt, Lukas
Download or read book Granular aluminium superinductors written by Grünhaupt, Lukas and published by KIT Scientific Publishing. This book was released on 2019-10-24 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adding nonlinearity to an electromagnetic-magnonic quantum hybrid device by : Pfirrmann, Marco
Download or read book Adding nonlinearity to an electromagnetic-magnonic quantum hybrid device written by Pfirrmann, Marco and published by KIT Scientific Publishing. This book was released on 2020-10-05 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, hybrid systems based on yttrium-iron-garnet (YIG), three dimensional microwave cavity resonators, and superconducting transmon qubits, are investigated by continuous wave and pulsed microwave spectroscopy. Limitations to the magnetic linewidth in the quantum regime are identified and coherent exchange between a magnon and a superconducting qubit are demonstrated. Finally, a first step towards a strongly coupled hybrid system containing all three components is demonstrated.
Book Synopsis Quantum Sensing Experiments with Superconducting Qubits by : Schneider, Andre
Download or read book Quantum Sensing Experiments with Superconducting Qubits written by Schneider, Andre and published by KIT Scientific Publishing. This book was released on 2021-06-04 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum sensing is a vast and emerging field enabling in-situ studies of quantum systems and hence the development of quantum hybrid systems. This work creates the fundament of direct superconducting-magnetic hybrid systems by developing a local microwave sensing scheme and studying the influence of a static magnetic field on a superconducting qubit. Finally, a proof-of-principle hybrid system is demonstrated, which opens the path towards superconducting-magnetic quantum circuits.
Book Synopsis Nonlinear Effects in Superconducting Quantum Interference Meta-Atoms by : Jung, Philipp
Download or read book Nonlinear Effects in Superconducting Quantum Interference Meta-Atoms written by Jung, Philipp and published by KIT Scientific Publishing. This book was released on 2015-01-19 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis deals with the nonlinear aspects of superconducting quantum interference devices (SQUIDs) as magnetic meta-atoms. Such meta-atoms are usually resonant structures that constitute the basic building blocks of a metamaterial with the purpose of giving the material unconventional magnetic properties. Due to their intrinsic nonlinearity, SQUIDs exhibit a number of phenomena such as frequency tunability and multi-stability that make them attractive as controllable meta-atoms.
Book Synopsis One-Dimensional Tunable Josephson Metamaterials by : Butz, Susanne
Download or read book One-Dimensional Tunable Josephson Metamaterials written by Butz, Susanne and published by KIT Scientific Publishing. This book was released on 2015-01-07 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a novel approach to the experimental realization of tunable, superconducting metamaterials. Therefore, conventional resonant meta-atoms are replaced by meta-atoms that contain Josephson junctions, which renders their resonance frequency tunable by an external magnetic field. This tunability is theoretically and experimentally investigated in one-dimensional magnetic and electric metamaterials. For the magnetic metamaterial, the effective, magnetic permeability is determined.
Book Synopsis Hybrid quantum system based on rare earth doped crystals by : Probst, Sebastian
Download or read book Hybrid quantum system based on rare earth doped crystals written by Probst, Sebastian and published by KIT Scientific Publishing. This book was released on 2016-09-05 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid quantum circuits interfacing rare earth spin ensembles with microwave resonators are a promising approach for application as coherent quantum memory and frequency converter. In this thesis, hybrid circuits based on Er and Nd ions doped into Y?SiO? and YAlO? crystals are investigated by optical and on-chip microwave spectroscopy. Coherent strong coupling between the microwave resonator and spin ensemble as well as a multimode memory for weak coherent microwave pulses are demonstrated.
Book Synopsis Local Probing of a Superconductor’s Quasiparticles and Bosonic Excitations with a Scanning Tunnelling Microscope by : Gozlinski, Thomas
Download or read book Local Probing of a Superconductor’s Quasiparticles and Bosonic Excitations with a Scanning Tunnelling Microscope written by Gozlinski, Thomas and published by KIT Scientific Publishing. This book was released on 2023-03-24 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complementary to scattering techniques, scanning tunnelling microscopy provides atomic-scale real space information about a material's electronic state of matter. State-of-the-art designs of a scanning tunnelling microscope (STM) allow measurements at millikelvin temperatures with unprecedented energy resolution. Therefore, this instrument excels in probing the superconducting state at low temperatures and especially its local quasiparticle excitations as well as bosonic degrees of freedom.
Book Synopsis Molecular Motor Based on Single Chiral Tripodal Molecules Studied with STM by : Skolaut, Julian
Download or read book Molecular Motor Based on Single Chiral Tripodal Molecules Studied with STM written by Skolaut, Julian and published by KIT Scientific Publishing. This book was released on 2023-09-14 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents a single molecular motor driven by the current in an STM. Its chiral functional group is supposed to perform a rotation in a preferred direction, proven by Binomial tests to be statistically significant. The rotation is proposedly driven by the chiral-induced spin selectivity effect (CISS). However, the studies of the rotation on the dependence on the lateral tip position, voltage and current indicate that he CISS is unlikely to cause the preferred rotation direction.