Research from the University of Bristol has demonstrated a way to almost double measurement precision by using photons of light with which to gauge distances.
Research from the University of Bristol has demonstrated a way to almost double measurement precision by using photons of light with which to gauge distances. The findings were reported in the international journal
Science.
Dr Jeremy O’Brien, the only British member of an otherwise all-Japanese team, said: “The precision of such a measurement depends on the wavelength of the light used. By using a group of four-photons, the set behaves as if it had a shorter wavelength than a single photon. This is rather like using a ruler with spacing four times as fine.”
Further details of this ground-breaking research can be read at Science News.
Further information
The paper: Beating the standard quantum limit with four-entangled photons Tomohisa Nagata, Ryo Okamoto, Jeremy L. O'Brien, Keiji Sasaki, and Shigeki Takeuch Science 4 May 2007: Vol. 316. no. 5825, pp. 726 - 729 DOI: 10.1126/science.1138007
