Title: Engineering dark states in hybrid quantum systems
Other Titles: Erzeugung von langlebigen Zuständen in Hybriden Quantensystemen
Language: English
Authors: Glattauer, Ralph 
Qualification level: Diploma
Keywords: Quantum Physik; Quantentechnologie
Quantum Physics; Quantum Technologies
Advisor: Schmiedmayer, Hannes-Jörg 
Assisting Advisor: Majer, Johannes 
Issue Date: 2016
Number of Pages: 48
Qualification level: Diploma
Hybrid quantum systems combine physical systems with different properties to get the best of both worlds. In our case this means using nitrogen vacancy centers together with superconducting coplanar waveguide resonators. While the resulting system shows promising results, its usage is generally limited by decoherence effects. In this thesis, we want to show a method to improve this by engineering long lived dark states that improve the decay dynamics of our system by a factor 10. This is signifcantly longer than the cavity or the spin decay, enabling our hybrid quantum system to perform better than its individual parts in this regard. We do this by actively shaping our inhomogeneously broadened spin distribution through the insertion of a high power signal at specifc, freely chosen frequencies to excite these spins. The results in this thesis contributed to [S. Putz, A. Angerer, D. O. Krimer, R. Glattauer, William J. Munro, S. Rotter, J. Schmiedmayer and J. Majer. Engineering Long-Lived Dark-States in Electron Spin Ensembles arXiv:1512.00248]. We further test our system under strong driving fields and measure spin echos and bistability.
URI: https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-516
Library ID: AC13056655
Organisation: E141 - Atominstitut 
Publication Type: Thesis
Appears in Collections:Thesis

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