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Time-resolved quantum nanoelectronics in electromagnetic environments

Abstract : Quantum nanoelectronics is in a phase of great expansion, supported mainlyby the development of quantum computing. A high degree of precision isrequired to achieve current objectives, but on the other hand, the experi-ences are also more complex than ever. Nuremical tools seem necessary toachieve the required understanding while dealing with such complexity. Thetime scales involved are getting shorter and are getting closer to the intrinsicquantum time scales of the device, such as time of flight. Our group’s pre-vious work has simulated time-dependent electron transport on a quantumscale. This thesis aims to improve the previous algorithms to obtain greateraccuracy and a better description of the systems by including the electronicenvironment. This work is divided into three main areas. First, we improveof numerical time-dependent simulation tools to take into account an elec-tronic environment in a self-consistent way. The new algorithm can achievearbitrary accuracy in a controlled way. Second, the new algorithm is used todemonstrate the existence of new physical phenomena. We study Josephsonjunctions in different environments to enhance the role of quasi-particles, theeffect of a very short pulse, and to study topological junction characteriza-tion techniques. Finally, various developments are being studied to integratethe phenomenon of decoherence and quantum noise into the simulations.
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Submitted on : Tuesday, September 15, 2020 - 12:26:10 PM
Last modification on : Wednesday, April 7, 2021 - 11:16:38 AM
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  • HAL Id : tel-02939084, version 1



Benoît Rossignol. Time-resolved quantum nanoelectronics in electromagnetic environments. Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]. Université Grenoble Alpes [2020-..], 2020. English. ⟨NNT : 2020GRALY004⟩. ⟨tel-02939084⟩



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