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TUE: Tuesday Contributed Sessions
TUE 5: QIP Certification and Benchmarking
TUE 5.2: Vortrag
Dienstag, 9. September 2025, 14:30–14:45, ZHG006
Characterizing multimode linear optical devices via Scattershot Boson Sampling — •Cheeranjiv Pandey1, Robert Schade2, Jan-Lucas Eickmann1, Jonas Lammers1, Florian Lütkewitte1, Fabian Schlue1, Kai Hong Luo1, Simone Atzeni1, Mikhail Roiz1, Christian Plessl2, Benjamin Brecht1, Michael Stefszky1, and Christine Silberhorn1 — 1Paderborn University, Integrated Quantum Optics, Institute of Photonic Quantum Systems (PhoQS) Warburger Str. 100, 33098, Paderborn, Germany — 2Paderborn Center for Parallel Computing, Paderborn University, Warburger Str. 100, 33098 Paderborn, Germany
Photonics has recently emerged as a promising platform for implementing various quantum computational and communication schemes. At the heart of many such schemes lie multimode linear optical devices, composed of integrated arrays of beam splitters and phase shifters. Previous work has demonstrated that any arbitrary unitary matrix can be decomposed into an array of these components. Consequently, these devices can implement any unitary transformation between their input and output channels by precisely controlling the beam splitter transmissivities and phase shifter values. However, real devices often deviate from their ideal behavior due to fabrication imperfections and thermal cross-talk, making accurate device characterization essential. We showcase our ongoing research focused on developing characterization techniques that will allow us to reconstruct the unitary matrix implemented by such devices using data obtained from Scattershot Boson Sampling (SBS) experiments.
Keywords: Scattershot Boson Sampling; Integrated Linear Optical Devices; Device Characterization; Quantum Optics; Photonics