RT Journal Article
T1 Quantum Fisher information with coherence
A1 Hradil, Zdeněk
A1 Řeháček, Jaroslav
A1 Sánchez Soto, Luis Lorenzo
A1 Englert, Berthold-Georg
AB In recent proposals for achieving optical super-resolution, variants of the quantum Fisher information (QFI) quantify the attainable precision. We find that claims about a strong enhancement of the resolution resulting from coherence effects are questionable because they refer to very small subsets of the data without proper normalization. When the QFI is normalized, accounting for the strength of the signal, there is no advantage of coherent sources over incoherent ones. Our findings have a bearing on further studies of the achievable precision of optical instruments.
PB Optical Society of America
SN 2334-2536
YR 2019
FD 2019-11-14
LK https://hdl.handle.net/20.500.14352/5981
UL https://hdl.handle.net/20.500.14352/5981
LA eng
NO © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.Grantová Agentura České Republiky (18-04291S); Ministerio de Economía y Competitividad (FIS2015-67963-P, PGC2018-099183- B-I00); Ministry of Education—Singapore; National Research Foundation Singapore.
NO Ministerio de Economía y Competitividad (MINECO)
NO Grantová Agentura České Republiky
DS Docta Complutense
RD 7 abr 2025