Randomized gap and amplitude estimation
| Autor: | Zintchenko, Ilia, Wiebe, Nathan |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 93, 062306 (2016) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.93.062306 |
| Popis: | We provide a method for estimating spectral gaps in low-dimensional systems. Unlike traditional phase estimation, our approach does not require ancillary qubits nor does it require well characterised gates. Instead, it only requires the ability to perform approximate Haar-random unitary operations, applying the unitary whose eigenspectrum is sought out and performing measurements in the computational basis. We discuss application of these ideas to in-place amplitude estimation and quantum device calibration. Comment: 15 pages, 3 figures, minor changes from previous version |
| Databáze: | arXiv |
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