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-enhanced measurements without entanglement

D Braun, G Adesso, F Benatti, R Floreanini… - Reviews of Modern …, 2018‏ - APS
Quantum-enhanced measurements exploit quantum mechanical effects for increasing the
sensitivity of measurements of certain physical parameters and have great potential for both …

Advances in quantum metrology

V Giovannetti, S Lloyd, L Maccone - Nature photonics, 2011‏ - nature.com
The statistical error in any estimation can be reduced by repeating the measurement and
averaging the results. The central limit theorem implies that the reduction is proportional to …

Optical quantum metrology

M Barbieri - PRX Quantum, 2022‏ - APS
The purpose of quantum technologies is to explore how quantum effects can improve on
existing solutions for the treatment of information. Quantum photonics sensing holds great …

Quantum Fisher information of entangled coherent states in the presence of photon loss

YM Zhang, XW Li, W Yang, GR ** - … Review A—Atomic, Molecular, and Optical …, 2013‏ - APS
We investigate the performance of entangled coherent states for quantum-enhanced phase
estimation. An exact analytical expression of quantum Fisher information is derived to show …

Experimental quantum computing without entanglement

BP Lanyon, M Barbieri, MP Almeida, AG White - Physical review letters, 2008‏ - APS
Deterministic quantum computation with one pure qubit (DQC1) is an efficient model of
computation that uses highly mixed states. Unlike pure-state models, its power is not derived …

Prospective applications of optical quantum memories

F Bussieres, N Sangouard, M Afzelius… - Journal of Modern …, 2013‏ - Taylor & Francis
An optical quantum memory can be broadly defined as a system capable of storing a
quantum state through interaction with light at optical frequencies. During the last decade …

Quantum criticality as a resource for quantum estimation

P Zanardi, MGA Paris, L Campos Venuti - Physical Review A—Atomic …, 2008‏ - APS
We address quantum critical systems as a resource in quantum estimation and derive the
ultimate quantum limits to the precision of any estimator of the coupling parameters. In …

Quantum metrology for a general Hamiltonian parameter

S Pang, TA Brun - Physical Review A, 2014‏ - APS
Quantum metrology enhances the sensitivity of parameter estimation using the distinctive
resources of quantum mechanics such as entanglement. It has been shown that the …

How to perform the most accurate possible phase measurements

DW Berry, BL Higgins, SD Bartlett, MW Mitchell… - Physical Review A …, 2009‏ - APS
We present the theory of how to achieve phase measurements with the minimum possible
variance in ways that are readily implementable with current experimental techniques …