Table 3 Experimental and simulated results for the quantum private queries. The following figures of merit are used: the average number of bits learned by the user per query, 
, the average proportion of the database where the user has significant partial information (i.e. ek ≤ tD), 
and the failure probability (i.e. that the user learns zero bits), P0
, the average proportion of the database where the user has significant partial information (i.e. ek ≤ tD), 
and the failure probability (i.e. that the user learns zero bits), P0From: Performing private database queries in a real-world environment using a quantum protocol
µ = 0.95 ± 0.047 | µ = 9.5 ± 0.47 | low-noise | |||
|---|---|---|---|---|---|
experimental | simulated | experimental | simulated | simulated | |
| 4.1 ± 2.4 | 3.2 ± 1.1 | 3.9 ± 3.1 | 3.5 ± 1.9 | 4.35 |
| 6.1 ± 0.25 | 6.1 ± 0.25 | 6.3 ± 1.4 | 6.3 ± 1.3 | 0.96 |
P0 (%) | 9.1 ± 9.1 | 8.8 | 8.7 ± 2.9 | 9.4 | 1.29 |
(bits)
(%)