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Simon algorithm in measurement-based quantum computing

Quantum Physics 2024-05-29 v1

Abstract

Simon's hidden subgroup algorithm was the first quantum algorithm to prove the superiority of quantum computing over classical computing in terms of complexity. Measurement-based quantum computing (MBQC) is a formulation of quantum computing that, while equivalent in terms of computational power, can be advantageous in experiments and in displaying the core mechanics of quantum algorithms. We present a reformulation of the Simon algorithm into the language of MBQC -- in detail for two qubits and schematically for nn qubits. We utilize the framework of ZX-calculus, a graphical tensor description of quantum states and operators, to translate the circuit description of the algorithm into a form concordant with MBQC. The result for the two-qubit Simon algorithm is a ten-qubit cluster state on which single-qubit measurements suffice to extract the desired information. Additionally, we show that the nn-qubit version of the Simon algorithm can be formulated in MBQC as cluster state graph with 2n2n nodes and n2n^2 edges. This is an example of the MBQC formulation of a quantum algorithm that is exponentially faster than its classical counterpart. As such, this formulation should aid in understanding the core mechanics of such an established algorithm and could serve as a blueprint for experimental implementation.

Keywords

Cite

@article{arxiv.2405.18143,
  title  = {Simon algorithm in measurement-based quantum computing},
  author = {Maximilian Schwetz and Reinhard M. Noack},
  journal= {arXiv preprint arXiv:2405.18143},
  year   = {2024}
}