Modelling assisted tunneling on the Bloch sphere using the Quantum Composer

• URL: http://arxiv.org/abs/2212.04845v3
• Date: Tue, 28 Nov 2023 13:42:11 GMT
• Title: Modelling assisted tunneling on the Bloch sphere using the Quantum Composer
• Authors: Jonas Bley, Vieri Mattei, Simon Goorney, Jacob Sherson, Stefan Heusler
• Abstract summary: The Bloch sphere representation is a geometric model for all possible quantum states of a two-level system. As explicit application, we consider the time dynamics of a particle in a double-well potential. Driven by a collaborative approach we call educator-developer dialogue, an updated version of the software Quantum Composer is presented.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: The Bloch sphere representation is a geometric model for all possible quantum states of a two-level system that can be used to describe the time dynamics of a qubit. As explicit application, we consider the time dynamics of a particle in a double-well potential. In particular, we adopt a recent method for off-resonant excitations, the so-called SUPER principle (Swing-UP of the quantum emitter population) driven by periodic electromagnetic fields, to the context of quantum tunnelling. We show that the tunnelling probability can be enhanced significantly when an appropriate oscillation of the potential height is introduced. Driven by a collaborative approach we call educator-developer dialogue, an updated version of the software Quantum Composer is presented. For educational purposes, we map the two lowest energy states of the 1D-Schr\"odinger equation to the Bloch sphere representation, leading to a rather clear and intuitive physical picture for the pertinent time dynamics.

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