2022/06/13 by Syamsundar De, De, Syamsundar, Vahid Ansari +9 · 2 citations
Computer Science · Physics and Astronomy · #Cloud Computing and Resource Management #FOS: Physical sciences #Optics (physics.optics) #Quantum Computing Algorithms and Architecture #Quantum Physics (quant-ph) #Quantum and electron transport phenomena
paper · pdf · doi:10.48550/arxiv.2206.06059
openalex publication_date 2022/06/13 · openalex created_date 2022/06/16 · openalex updated_date 2026/07/28
The ability to apply user-chosen large-scale unitary operations with high fidelity to a quantum state is key to realizing future photonic quantum technologies. Here, we realize the implementation of programmable unitary operations on up to 64 frequency-bin modes. To benchmark the performance of our system, we probe different quantum walk unitary operations, in particular Grover walks on four-dimensional hypercubes with similarities exceeding 95% and quantum walks with 400 steps on circles and finite lines with similarities of 98%. Our results open a new path towards implementing high-quality unitary operations, which can form the basis for applications in complex tasks, such as Gaussian boson sampling.