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Nonlinear Effects in Superconducting Quantum Interference Meta-Atoms

Nonlinear Effects in Superconducting Quantum Interference Meta-Atoms
Author: Jung, Philipp
Publisher: KIT Scientific Publishing
Total Pages: 164
Release: 2015-01-19
Genre: Physics
ISBN: 3731502941

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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.


Nonlinear Effects in Superconducting Quantum Interference Meta-Atoms

Nonlinear Effects in Superconducting Quantum Interference Meta-Atoms
Author: Philipp Jung
Publisher:
Total Pages: 156
Release: 2020-10-09
Genre: Science
ISBN: 9781013281907

Download Nonlinear Effects in Superconducting Quantum Interference Meta-Atoms Book in PDF, ePub and Kindle

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. 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.


Adding nonlinearity to an electromagnetic-magnonic quantum hybrid device

Adding nonlinearity to an electromagnetic-magnonic quantum hybrid device
Author: Pfirrmann, Marco
Publisher: KIT Scientific Publishing
Total Pages: 136
Release: 2020-10-05
Genre: Science
ISBN: 3731510030

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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.


Quantum Sensing Experiments with Superconducting Qubits

Quantum Sensing Experiments with Superconducting Qubits
Author: Schneider, Andre
Publisher: KIT Scientific Publishing
Total Pages: 170
Release: 2021-06-04
Genre: Science
ISBN: 3731510324

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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.


Local Probing of a Superconductor’s Quasiparticles and Bosonic Excitations with a Scanning Tunnelling Microscope

Local Probing of a Superconductor’s Quasiparticles and Bosonic Excitations with a Scanning Tunnelling Microscope
Author: Gozlinski, Thomas
Publisher: KIT Scientific Publishing
Total Pages: 208
Release: 2023-03-24
Genre: Science
ISBN: 3731512793

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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.


Quantum Tunneling of Josephson Vortices in High-Impedance Long Junctions

Quantum Tunneling of Josephson Vortices in High-Impedance Long Junctions
Author: Wildermuth, Matthias Micha
Publisher: KIT Scientific Publishing
Total Pages: 160
Release: 2023-09-11
Genre:
ISBN: 373151303X

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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.


Molecular Motor Based on Single Chiral Tripodal Molecules Studied with STM

Molecular Motor Based on Single Chiral Tripodal Molecules Studied with STM
Author: Skolaut, Julian
Publisher: KIT Scientific Publishing
Total Pages: 164
Release: 2023-09-14
Genre:
ISBN: 3731512475

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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.