A. Matthew Smith, P. M. Alsing, J. R. McDonald
We question whether the measurement based quantum computing algorithm is in fact Grover's algorithm or simply a similar oracular search method. The two algorithms share several several qualitative features especially in the case of the trivial 4 element search, which is the largest size photonic Grover's algorithm that has been experimentally implemented to date. This has led some to refer to both substantiations as Grover's algorithm. We compare multiple features of the two algorithms including the behavior of the oracle tags and the entanglement dynamics, both qualitatively and quantitatively. We find significant and fundamental differences in the operation of the two algorithms, particularly in cases involving searches on more than four elements.
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http://arxiv.org/abs/1211.3407
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