Title :
Entanglement-free, Heisenberg-limited phase measurement
Author :
Higgins, B.L. ; Wiseman, H.M. ; Pryde, G.J. ; Berry, D.W. ; Bartlett, S.D.
Author_Institution :
Centre for Quantum Comput. Technol., Griffith Univ., Brisbane, QLD
Abstract :
We demonstrate experimental Heisenberg-limited scaling of the variance in optical phase measurements. Our algorithm replaces entangled states - often thought essential for Heisenberg scaling - with single photons, multiple phase shift passes, and adaptive measurement.
Keywords :
Heisenberg model; phase measurement; quantum entanglement; quantum optics; Heisenberg-limited scaling; adaptive measurement; algorithm; entangled states; multiple phase shift; optical phase; phase measurement; single photons; Optical computing; Optical interferometry; Optical retarders; Phase estimation; Phase measurement; Phase shifting interferometry; Physics computing; Polarization; Quantum computing; Quantum entanglement; (120.5050) Phase measurement; (270.5290) Photon statistics;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
