Quantum-enhanced measurements without entanglement
By Daniel Braun, Gerardo Adesso, Fabio Benatti, Roberto Floreanini, Ugo Marzolino, Morgan W. Mitchell, Stefano Pirandola. Reviews of Modern Physics, 2017
406 citations recorded by the source corpus.
Quantum-enhanced measurements exploit quantum mechanical effects for increasing the sensitivity of measurements of certain physical parameters and have great potential for both fundamental science and concrete applications. Most of the research has so far focused on using highly entangled states, which are, however, difficult to produce and to stabilize for a large number of constituents. In the following we review alternative mechanisms, notably the use of more general quantum correlations such as quantum discord, identical particles, or non-trivial hamiltonians; the estimation of thermodynamical parameters or parameters characterizing non-equilibrium states; and the use of quantum phase transitions. We describe both theoretically achievable enhancements and enhanced sensitivities, not primarily based on entanglement, that have already been demonstrated experimentally, and indicate some possible future research directions.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/c356fffdef41f0230f80b6cd79341a1b12d282fb
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): “The use of peculiar quantum many-body states as probes in quantum metrology can enhance the accuracy in parameter estimation [230, 315].”
- Quantum Fisher information matrix and multiparameter estimation (2019, methodology): “on the quantum enhanced metrology without entanglement [7], the ones by Pezzè et al.”