Quantum metrology with nonclassical states of atomic ensembles

L Pezze, A Smerzi, MK Oberthaler, R Schmied… - Reviews of Modern …, 2018 - APS
Quantum technologies exploit entanglement to revolutionize computing, measurements, and
communications. This has stimulated the research in different areas of physics to engineer …

Scalable spin squeezing in a dipolar Rydberg atom array

G Bornet, G Emperauger, C Chen, B Ye, M Block… - Nature, 2023 - nature.com
The standard quantum limit bounds the precision of measurements that can be achieved by
ensembles of uncorrelated particles. Fundamentally, this limit arises from the non …

Improving cold-atom sensors with quantum entanglement: Prospects and challenges

SS Szigeti, O Hosten, SA Haine - Applied Physics Letters, 2021 - pubs.aip.org
Quantum entanglement has been generated and verified in cold-atom experiments and
used to make atom-interferometric measurements below the shot-noise limit. However …

Improving metrology with quantum scrambling

Z Li, S Colombo, C Shu, G Velez, S Pilatowsky-Cameo… - Science, 2023 - science.org
Quantum scrambling describes the spreading of information into many degrees of freedom
in quantum systems, such that the information is no longer accessible locally but becomes …

Fisher information and entanglement of non-Gaussian spin states

H Strobel, W Muessel, D Linnemann, T Zibold… - Science, 2014 - science.org
Entanglement is the key quantum resource for improving measurement sensitivity beyond
classical limits. However, the production of entanglement in mesoscopic atomic systems has …

Quantum phase magnification

O Hosten, R Krishnakumar, NJ Engelsen, MA Kasevich - Science, 2016 - science.org
Quantum metrology exploits entangled states of particles to improve sensing precision
beyond the limit achievable with uncorrelated particles. All previous methods required …

Bounds on the capacity and power of quantum batteries

S Julià-Farré, T Salamon, A Riera, MN Bera… - Physical Review …, 2020 - APS
Quantum batteries, composed of quantum cells, are expected to outperform their classical
analogs. The origin of such advantages lies in the role of quantum correlations, which may …

Phase-space geometry and optimal state preparation in quantum metrology with collective spins

MH Muñoz-Arias, IH Deutsch, PM Poggi - PRX Quantum, 2023 - APS
We revisit well-known protocols in quantum metrology using collective spins and propose a
unifying picture for optimal state preparation based on a semiclassical description in phase …

Metrological detection of multipartite entanglement from young diagrams

Z Ren, W Li, A Smerzi, M Gessner - Physical Review Letters, 2021 - APS
We characterize metrologically useful multipartite entanglement by representing partitions
with Young diagrams. We derive entanglement witnesses that are sensitive to the shape of …

High-precision quantum-enhanced gravimetry with a Bose-Einstein condensate

SS Szigeti, SP Nolan, JD Close, SA Haine - Physical Review Letters, 2020 - APS
We show that the inherently large interatomic interactions of a Bose-Einstein condensate
(BEC) can enhance the sensitivity of a high precision cold-atom gravimeter beyond the shot …