October 16, 2024 — A new method that overcomes challenges in quantum computation offering a more scalable and resource-efficient solution for fault tolerant quantum computers has been developed by researchers at the Hebrew University of Jerusalem.
The innovative method reported in Nature Photonics uses high-dimensional spatial encoding to create large cluster states more efficiently, addressing key challenges in scalability and computation speed. This paves the way for faster, resource-efficient, and fault-tolerant quantum computers.
Quantum computers are facing a major roadblock in producing large cluster states necessary for computations. The standard approach sees detection probabilities decreasing exponentially as the number of photons increases. A promising route to scalability is photonic-measurement-based quantum computation. Prof. Bromberg and Dr. Lib’s study addresses this issue by encoding multiple qubits within each photon through spatial encoding. This innovative approach has successfully generated cluster states with over nine qubits at a frequency of 100 Hz, a significant achievement in the field.
According to Prof. Yaron Bromberg from the Racah Institute of Physics at the Hebrew University, “Our results show that using high-dimensional encoding not only overcomes previous scalability barriers but also offers a practical and efficient approach to quantum computing. This represents a major leap forward.”
Additionally, the researchers demonstrated that this method substantially reduces computation time by enabling instantaneous feedforward between qubits encoded within the same photon. This breakthrough will result in more resource-efficient quantum computations, potentially leading to faster, fault-tolerant quantum computers capable of handling complex problems.
The research paper titled “Resource-efficient photonic quantum computation with high-dimensional cluster states” is now available at Nature Photonics and can be accessed at https://doi.org/10.1038/s41566-024-01524-w.
Researchers:
Ohad Lib, Yaron Bromberg
Institution:
Racah Institute of Physics, The Hebrew University of Jerusalem
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