1. Applied Quantum Systems, Felix Bloch Institute for Solid State Physics, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany
2. Semiconductor Physics Group, Felix Bloch Institute for Solid State Physics, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany
3. Institute for Quantum Optics, Center for Integrated Quantum Science and Technology (IQST), Ulm University, Albert Einstein Allee 11, 89081 Ulm, Germany