Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 35: Quantum States of Light
Q 35.6: Talk
Wednesday, March 13, 2024, 16:00–16:15, HS 3118
Creation of Non-Gaussian Quantum States with a GBS-like device — •Gil Zimmermann1,2, Marius Leyendecker1,2, René Sondenheimer1,2, and Fabian Steinlechner1,2 — 1Friedrich Schiller University, Jena, Germany — 2Fraunhofer IOF, Jena, Germany
Non-Gaussian quantum states play an important role in quantum information, quantum computing and quantum sensing. There are many different protocols to generate different non-Gaussian states. One system, which is a generalisation of many of these protocols, is based on a so-called Gaussian boson sampling (GBS) type device. The advantage of this is that different non-Gaussian states can be produced with just one system. The GBS-like device consists of an N-mode linear interferometer that can implement any unitary transformation. N single mode Gaussian quantum states are injected into the interferometer and N-M modes are measured in the output with the aid of photon number resolving (PNR) detectors. A resulting quantum state is present in the remaining M output modes of the interferometer. By varying the propterties of the input states and the linear interferometer and considering different outcomes at the PNR detectors, optimisation algorithms can be designed regarding fidelity and generation probability. This allows us to find parameters for the best possible circuit that generates a specific M-mode non-Gaussian output state. In this work, a parameter study regarding the GBS-like device is carried out. For various single and multimode non-Gaussian states, we analyse the experimental feasibility under the presence of loss.
Keywords: Gaussion Boson Sampling (GBS); non-Gaussian states; resource states; multimode interferometer; conditional measurement