TEP Seminar - Jasmin Meinecke

Photons exhibit low decoherence and fast transmission, making them highly promising for emerging quantum technologies. Integrated circuits, in particular, offer stable structures for quantum computation and simulation. These can be implemented through general unitary transformations composed of basic elements such as multi-mode interferometers [1,2]. Another approach is the direct implementation of the Hamiltonian of the evolution through for example integrated waveguide arrays, which can be used for simulations based on quantum walk models. The precise control of both the path and polarization degrees of freedom in these systems allows for the simulation of Markovian and non-Markovian dynamics found in open quantum systems [3]. In our work, we analyze information and energy flow in quantum systems, providing insights into the time evolution and dynamics of many-body systems. Furthermore, we present methods to measure quantum correlations in settings with environmental noise [4].
 

References

[1] Arends, Christian, et al. ”Decomposing large unitaries into multimode devices of arbitrary size.” Physical Review Research 6.1 (2024): L012043.
[2] Qiang, Xiaogang, et al. ”Implementing graph-theoretic quantum algorithms on a silicon photonic quantum walk processor.” Science Advances 7.9 (2021): eabb8375.
[3] Dziewior, Jan, et al. ”Tracing Information Flow from Open Quantum Systems.” arXiv:2103.11994 (2021).
[4] Cieslinski, Paweł, et al. ”Analysing quantum systems with randomised measurements.” Physics Reports 1095 (2024): 1-48.