The first experimental demonstration of an adaptive quantum state estimation (AQSE) is reported. The strong consistency and asymptotic efficiency of AQSE have been mathematically proven [ A. Fujiwara J. Phys. A 39 12489 (2006)]. In this Letter, the angle of linear polarization of single photons, the phase parameter between the right and the left circularly polarization, is estimated using AQSE, and the strong consistency and asymptotic efficiency are experimentally verified. AQSE will provide a general useful method in both quantum information processing and metrology.
@article{arxiv.1210.3145,
title = {Experimental Demonstration of Adaptive Quantum State Estimation},
author = {Ryo Okamoto and Minako Iefuji and Satoshi Oyama and Koichi Yamagata and Hiroshi Imai and Akio Fujiwara and Shigeki Takeuchi},
journal= {arXiv preprint arXiv:1210.3145},
year = {2015}
}