TY - JOUR
T1 - Non-adaptive Heisenberg-limited metrology with multi-channel homodyne measurements
AU - Triggiani, Danilo
AU - Facchi, Paolo
AU - Tamma, Vincenzo
N1 - 11 pages, 1 figure
PY - 2022/1/17
Y1 - 2022/1/17
N2 - We show a protocol achieving the ultimate Heisenberg-scaling sensitivity in the estimation of a parameter encoded in a generic linear network, without employing any auxiliary networks, and without the need of any prior information on the parameter nor on the network structure. As a result, this protocol does not require a prior coarse estimation of the parameter, nor an adaptation of the network. The scheme we analyse consists of a single-mode squeezed state and homodyne detectors in each of the M output channels of the network encoding the parameter, making it feasible for experimental applications.
AB - We show a protocol achieving the ultimate Heisenberg-scaling sensitivity in the estimation of a parameter encoded in a generic linear network, without employing any auxiliary networks, and without the need of any prior information on the parameter nor on the network structure. As a result, this protocol does not require a prior coarse estimation of the parameter, nor an adaptation of the network. The scheme we analyse consists of a single-mode squeezed state and homodyne detectors in each of the M output channels of the network encoding the parameter, making it feasible for experimental applications.
KW - quant-ph
UR - https://link.springer.com/article/10.1140%2Fepjp%2Fs13360-021-02337-4#rightslink
U2 - 10.1140/epjp/s13360-021-02337-4
DO - 10.1140/epjp/s13360-021-02337-4
M3 - Article
SN - 2190-5444
VL - 137
JO - The European Physical Journal Plus
JF - The European Physical Journal Plus
M1 - 125
ER -