Superconducting flux transformers for the modulation of flux-tunable resonators
| dc.contributor.author | Dakroury, Karim | |
| dc.contributor.department | Chalmers tekniska högskola / Institutionen för mikroteknologi och nanovetenskap (MC2) | sv |
| dc.contributor.department | Chalmers University of Technology / Department of Microtechnology and Nanoscience (MC2) | en |
| dc.contributor.examiner | Wieczorek, Witlef | |
| dc.contributor.supervisor | Paradkar, Achintya | |
| dc.contributor.supervisor | Wieczorek, Witlef | |
| dc.date.accessioned | 2024-10-02T19:41:15Z | |
| dc.date.available | 2024-10-02T19:41:15Z | |
| dc.date.issued | 2024 | |
| dc.date.submitted | ||
| dc.description.abstract | Pushing the limits of quantum mechanics to larger objects is a goal of current research efforts. One approach to test the limits of quantum mechanics is to achieve quantum superposition with a macroscopic object on the order of micrometers. A possible experimental approach in this direction is given by coupling a magnetically levitated particle to a superconducting flux-tunable resonator. This system can allow us to sense the particle’s motion and the flux-tunable resonator will act as the quantum sensor and the readout for the particle. This system exploits flux coupling between the particle and the flux-tunable resonator. An approach of realizing this flux coupling is by implementing a flux transformer which is the main goal of this thesis. In this thesis we demonstrate a theoretical model to optimize the geometry of the flux transformer for maximum flux transfer efficiency. The theoretical analysis is verified with simulations on COMSOL Multiphysics. Then, a reliable fabrication recipe has been developed which had high yield of superconducting flux transformer and flip-chip devices. A novel flip-chip assembly technique was implemented with usage of Indium microspheres as superconducting interconnects. The thin-film of the materials used for the flux transformer and the flip-chip devices were characterized to demonstrate their superconductivity. Finally, a proof-of-principle for flip-chip based modulation of a flux-tunable resonator is demonstrated. | |
| dc.identifier.coursecode | MCCX60 | |
| dc.identifier.uri | http://hdl.handle.net/20.500.12380/308840 | |
| dc.language.iso | eng | |
| dc.setspec.uppsok | PhysicsChemistryMaths | |
| dc.subject | flip-chip | |
| dc.subject | superconductivity | |
| dc.subject | nanofabrication | |
| dc.subject | flux transfomer | |
| dc.subject | underbump metallization | |
| dc.title | Superconducting flux transformers for the modulation of flux-tunable resonators | |
| dc.type.degree | Examensarbete för masterexamen | sv |
| dc.type.degree | Master's Thesis | en |
| dc.type.uppsok | H | |
| local.programme | Nanotechnology (MPNAT), MSc |