Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 37: Poster III

Q 37.43: Poster

Wednesday, March 13, 2024, 17:00–19:00, Tent B

Exploring the stability and performance of integrated linear optical networks for photonic quantum computing — •Cheeranjiv Pandey, Federico Pegoraro, Michael Stefszky, Benjamin Brecht, and Christine Silberhorn — Paderborn University, Integrated Quantum Optics, Institute for Photonic Quantum Systems (PhoQS), Warburger Str. 100, 33098, Paderborn, Germany

In recent years, photonic quantum computing has emerged as a highly promising platform. This is particularly evident in the context of demonstrating quantum advantage in noisy intermediate-scale quantum (NISQ) computing, as explored in tasks like Boson Sampling. However, the success of many such computations relies on the ability to accurately implement arbitrary unitary transformations on input quantum states. Previous work has demonstrated the feasibility of implementing arbitrary unitary transformations using an array of linear optical elements, such as beam splitters and phase shifters. This insight led to the conceptualization of a multi-port interferometer, a versatile network that can be programmed for implementing any unitary transformation between input and output channels. The accuracy and stability of these transformations on multi-port interferometers is crucial for effective quantum algorithms. Our ongoing research explores the stability and performance of programmed unitary operations in commercially available multi-port interferometers, with the aim to investigate their suitability for photonic quantum computing.

Keywords: Quantum Computing; Quantum Optics; Multi-port Interferometer; Boson Sampling; Unitary Transformations