Abstract
We introduce a simple protocol for adaptive quantum state tomography, which reduces the worst-case infidelity between the estimate and the true state from O(N−1/2) to O(N−1). It uses a single adaptation step and just one extra measurement setting. In a linear optical qubit experiment, we demonstrate a full order of magnitude reduction in infidelity (from 0.1 to 0.01) for a modest number of samples (N = 3 × 104).
Original language | English |
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Article number | 183601 |
Number of pages | 8 |
Journal | Physical Review Letters |
Volume | 111 |
Issue number | 18 |
Early online date | 29 Oct 2013 |
DOIs | |
Publication status | Published - 1 Nov 2013 |
Keywords
- quant-ph