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 …

Exploring the unification of quantum theory and general relativity with a Bose–Einstein condensate

R Howl, R Penrose, I Fuentes - New Journal of Physics, 2019 - iopscience.iop.org
Despite almost a century's worth of study, it is still unclear how general relativity (GR) and
quantum theory (QT) should be unified into a consistent theory. The conventional approach …

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 …

Quantum metrology with cold atoms

J Huang, S Wu, H Zhong, C Lee - Annual Review of Cold Atoms …, 2014 - World Scientific
Quantum metrology is the science that aims to achieve precision measurements by making
use of quantum principles. Attribute to the well-developed techniques of manipulating and …

Entanglement generation in quantum networks of Bose–Einstein condensates

AN Pyrkov, T Byrnes - New Journal of Physics, 2013 - iopscience.iop.org
Abstract Two component (spinor) Bose–Einstein condensates (BECs) are considered as the
nodes of an interconnected quantum network. Unlike standard single-system qubits, in a …

[PDF][PDF] Non-classical states of atomic ensembles: fundamentals and applications in quantum metrology

L Pezzè, A Smerzi, MK Oberthaler… - arXiv preprint arXiv …, 2016 - researchgate.net
The most precise measurement of a physical parameter (such as the strength of a field, a
force, or time) is very often obtained by mapping it to a phase that can be determined using …

Optimal control of quantum superpositions in a bosonic Josephson junction

M Lapert, G Ferrini, D Sugny - Physical Review A—Atomic, Molecular, and …, 2012 - APS
We show how to optimally control the creation of quantum superpositions in a bosonic
Josephson junction within the two-site Bose-Hubbard-model framework. Both geometric and …

Mesoscopic quantum superpositions in bimodal Bose-Einstein condensates: Decoherence and strategies to counteract it

K Pawłowski, M Fadel, P Treutlein, Y Castin, A Sinatra - Physical Review A, 2017 - APS
We study theoretically the interaction-induced generation of mesoscopic coherent spin state
superpositions (small-particle-number cat states) from an initial coherent spin state in …

Multiparticle entanglement dynamics of quantum chaos in a Bose-Einstein condensate

SC Li, L Pezzè, A Smerzi - Physical Review A, 2021 - APS
We study the particle-entanglement dynamics witnessed by the quantum Fisher information
(QFI) of a trapped Bose-Einstein condensate governed by the kicked rotor Hamiltonian. The …

Spin squeezing in Bose—Einstein condensates: Limits imposed by decoherence and non-zero temperature

A Sinatra, JC Dornstetter, Y Castin - Frontiers of Physics, 2012 - Springer
We consider dynamically generated spin squeezing in interacting bimodal condensates. We
show that particle losses and non-zero temperature effects in a multimode theory completely …