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THU: Thursday Contributed Sessions
THU 13: Poster Session: Applications
THU 13.18: Poster
Donnerstag, 11. September 2025, 16:30–18:30, ZHG Foyer 1. OG
Gradient Based Optimization of a Hybrid Quantum System for Fock State Preparation — •Benjamin Stodd1, Martin Gärttner1, and Sina Saravi2 — 1Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller University Jena, Germany — 2Department of Electrical Engineering and Information Technology, Paderborn University, Germany
The development of efficient and tailorable sources of quantum light, such as Fock states, is of major interest for the realization of optical quantum technologies. We investigate a hybrid quantum system composed of a quantum dot and a nonlinear crystal embedded in an optical cavity, driven by controlled pump pulses. This setup enables quantum state generation in one of the cavity modes, which can be tailored to be at an arbitrary frequency. Within this framework, we present a gradient-based numerical optimization of the system dynamics to identify pulse parameters that maximize the fidelity of the output state with a target Fock state. We demonstrate that very high fidelities can be achieved, particularly for low-photon-number states (F > 0.99 for N = 1, 2, 3). To account for realistic conditions, we further aim to develop a scheme that enables optimization of the system dynamics in the presence of loss, described by the Lindblad master equation. Our results highlight the potential of such hybrid platforms for reliable and tunable quantum state generation.
Keywords: Quantum Optics; Quantum Simulation; Open Quantum Systems; Optimization; Fock State