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 …

Quantum spin squeezing

J Ma, X Wang, CP Sun, F Nori - Physics Reports, 2011 - Elsevier
This paper reviews quantum spin squeezing, which characterizes the sensitivity of a state
with respect to SU (2) rotations, and is significant for both entanglement detection and high …

Nonlinear atom interferometer surpasses classical precision limit

C Gross, T Zibold, E Nicklas, J Esteve, MK Oberthaler - Nature, 2010 - nature.com
Interference is fundamental to wave dynamics and quantum mechanics. The quantum wave
properties of particles are exploited in metrology using atom interferometers, allowing for …

Atom-chip-based generation of entanglement for quantum metrology

MF Riedel, P Böhi, Y Li, TW Hänsch, A Sinatra… - Nature, 2010 - nature.com
Atom chips provide a versatile quantum laboratory for experiments with ultracold atomic
gases. They have been used in diverse experiments involving low-dimensional quantum …

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 …

Measurement of -wave scattering lengths in a two-component Bose-Einstein condensate

M Egorov, B Opanchuk, P Drummond, BV Hall… - Physical Review A …, 2013 - APS
We use collective oscillations of a two-component Bose-Einstein condensate (2CBEC) of 87
Rb atoms prepared in the internal states| 1〉≡| F= 1, m F=− 1〉 and| 2〉≡| F= 2, m F= 1〉 for …

Quantum Fisher information of the Greenberger-Horne-Zeilinger state in decoherence channels

J Ma, Y Huang, X Wang, CP Sun - Physical Review A—Atomic, Molecular, and …, 2011 - APS
Quantum Fisher information of a parameter characterizes the sensitivity of the state with
respect to changes of the parameter. In this article, we study the quantum Fisher information …

Quantum theory of phase estimation

L Pezze, A Smerzi - Atom interferometry, 2014 - ebooks.iospress.nl
Advancements in physics are often motivated/accompanied by advancements in our
precision measurements abilities. The current generation of atomic and optical …

Spin squeezing, entanglement and quantum metrology with Bose–Einstein condensates

C Gross - Journal of Physics B: Atomic, Molecular and Optical …, 2012 - iopscience.iop.org
Squeezed states, special kinds of entangled states, are known as a useful resource for
quantum metrology. In interferometric sensors, they allow us to overcome …

Optimal and robust quantum metrology using interaction-based readouts

SP Nolan, SS Szigeti, SA Haine - Physical Review Letters, 2017 - APS
Useful quantum metrology requires nonclassical states with a high particle number and
(close to) the optimal exploitation of the state's quantum correlations. Unfortunately, the …