Phys. Rev. A 76, 030306(R) (2007) [4 pages]Arbitrary accuracy iterative quantum phase estimation algorithm using a single ancillary qubit: A two-qubit benchmark
We discuss the implementation of an iterative quantum phase estimation algorithm with a single ancillary qubit. We suggest using this algorithm as a benchmark for multiqubit implementations. Furthermore, we describe in detail the smallest possible realization, using only two qubits, and exemplify with a superconducting circuit. We discuss the robustness of the algorithm in the presence of gate errors, and show that seven bits of precision is obtainable, even with very limited gate accuracies. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.76.030306
DOI:
10.1103/PhysRevA.76.030306
PACS:
03.67.Lx, 85.25.Cp
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