Non-adaptive Heisenberg-limited metrology with multi-channel homodyne measurements
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 17, 2022
- Source ID
- 10.1140/epjp/s13360-021-02337-4
Entities
People
- Danilo Triggiani
- Paolo Facchi
- Vincenzo Tamma
Organizations
- Istituto Nazionale di Fisica Nucleare
- Office of Naval Research Global