TY - JOUR T1 - Experimental demonstration of cheap and accurate phase estimation JF - Physical Review Letters Y1 - 2017 A1 - Kenneth Rudinger A1 - Shelby Kimmel A1 - Daniel Lobser A1 - Peter Maunz AB -

We demonstrate experimental implementation of robust phase estimation (RPE) to learn the phases of X and Y rotations on a trapped Yb+ ion qubit. We estimate these phases with uncertainties less than 4 · 10−4 radians using as few as 176 total experimental samples per phase, and our estimates exhibit Heisenberg scaling. Unlike standard phase estimation protocols, RPE neither assumes perfect state preparation and measurement, nor requires access to ancillae. We cross-validate the results of RPE with the more resource-intensive protocol of gate set tomography.

VL - 118 U4 - 190502 UR - https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.190502 CP - 19 U5 - doi.org/10.1103/PhysRevLett.118.190502 ER -