2026-07-20T01:04:22Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/84222023-08-27T01:23:57Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Ansari, Vahid author Brecht, Benjamin author Gil López, Jano author Donohue, John M. author Řeháček, Jaroslav author Zdeněk, Hradil author Sánchez Soto, Luis Lorenzo author Silberhorn, Christine author 2021-01-04 Accurate time-delay measurement is at the core of many modern technologies. We present 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. We experimentally resolve temporal separations 10 times smaller than the pulse duration, as well as imbalanced intensities differing by a factor of 10(2). This represents an improvement of more than an order of magnitude over the best standard methods based on intensity detection. 2691-3399 10.1103/PRXQuantum.2.010301 https://hdl.handle.net/20.500.14352/8422 http://dx.doi.org/10.1103/PRXQuantum.2.010301 https://journals.aps.org Achieving the ultimate quantum timing resolution