Science Daily January 5, 2021
An international team of researchers (USA – Stanford University, Canada, Czech Republic, Spain, Germany) presents a temporal-mode demultiplexing scheme that achieves the ultimate quantum precision for the simultaneous estimation of the temporal centroid, the time offset, and the relative intensities of an incoherent mixture of ultrashort pulses at the single-photon level. They experimentally resolved temporal separations 10 times smaller than the pulse duration, as well as imbalanced intensities. This represents an improvement of more than an order of magnitude over the best standard methods based on intensity detection. The findings could allow significant improvements in the future to the precision of applications such as LIDAR and GPS…read more. Open Access TECHNICAL ARTICLE
Abstract. Credit: PRX Quantum 2, 010301, 4 January 2021