English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Continuous monitoring of driven-dissipative quantum optical systems is acrucial element in the implementation of quantum metrology, providing essentialstrategies for achieving highly precise measurements beyond the classicallimit. In this context, the relevant figure of merit is the quantum Fisherinformation of the radiation field emitted by the driven-dissipative sensor.Saturation of the corresponding precision limit as defined by the quantumCramer-Rao bound is typically not achieved by conventional, temporally localcontinuous measurement schemes such as counting or homodyning. To address theoutstanding open challenge of efficient retrieval of the quantum Fisherinformation of the emission field, we design a novel continuous measurementstrategy featuring temporally quasilocal measurement bases as captured bymatrix product states. Such measurement can be implemented effectively byinjecting the emission field of the sensor into an auxiliary open system, a`quantum decoder' module, which `decodes' specific input matrix product statesinto simple product states as its output field, and performing conventionalcontinuous measurement at the output. We devise a universal recipe for theconstruction of the decoder by exploiting time reversal transformation ofquantum optical input-output channels, thereby establishing a universal methodto achieve the quantum Cramer-Rao precision limit for generic sensors based oncontinuous measurement. As a by-product, we establish an effective formula forthe evaluation of the quantum Fisher information of the emission field ofgeneric driven-dissipative open sensors. We illustrate the power of our schemewith paramagnetic open sensor designs including linear force sensors,fibre-interfaced nonlinear emitters, and driven-dissipative many-body sensors,and demonstrate that it can be robustly implemented under realisticexperimental imperfections.

Efficient Information Retrieval for Sensing via Continuous Measurement