Quantum metrology with nonclassical states of atomic ensembles

By Luca Pezzè, Augusto Smerzi, Markus K. Oberthaler, Roman Schmied, Philipp Treutlein. Reviews of Modern Physics, 2016

1,422 citations recorded by the source corpus.

Quantum technologies exploit entanglement to revolutionize computing, measurements, and communications. This has stimulated the research in different areas of physics to engineer and manipulate fragile many-particle entangled states. Progress has been particularly rapid for atoms. Thanks to the large and tunable nonlinearities and the well-developed techniques for trapping, controlling, and counting, many groundbreaking experiments have demonstrated the generation of entangled states of trapped ions, cold, and ultracold gases of neutral atoms. Moreover, atoms can strongly couple to external forces and fields, which makes them ideal for ultraprecise sensing and time keeping. All these factors call for generating nonclassical atomic states designed for phase estimation in atomic clocks and atom interferometers, exploiting many-body entanglement to increase the sensitivity of precision measurements. The goal of this article is to review and illustrate the theory and the experiments with atomic ensembles that have demonstrated many-particle entanglement and quantum-enhanced metrology.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/64331f94b60591de64b4baf51ad82c0346de30f5

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Geometry of quantum phase transitions (2019, background): “Exploring this possibility plays a pivotal role in the current development of quantum technology [306, 307, 308, 309, 310, 311, 312, 313, 314, 315].”
Robust Encoding of a Qubit in a Molecule (2019, neutral): “[95].”
Advances in quantum imaging (2024, neutral): “In this situation, for pure states, one has i ℏ Fock states and vacuum states over two arms of an interferometer, are optimal for phase measurement 23 .”
Harnessing the Power of the Second Quantum Revolution (2020, positive): “The quantum version of Fisher information dictates the ultimate noise ﬂoor for parameter estimation [53] at the heart of precision sensing and metrology; nonclassical probes allow us to beat the standard limits imposed by uncorrelated corpuscular quanta [54,55].”
Quantum Fisher information matrix and multiparameter estimation (2019, background): “In recent years, several outstanding reviews on quantum metrology and quantum parameter estimation have been provided from different perspectives and at different time, including the ones given by Giovannetti et al on the quantum-enhanced measurement [3] and the advances in quantum metrology [4], th”
Open quantum systems with local and collective incoherent processes: Efficient numerical simulations using permutational invariance (2018, background): “They have recently been implemented on hundreds of trapped ions [81, 198] and large ensembles of atoms in BoseEinstein condensates [130, 131, 199–202].”