Many-body nonlocality as a resource for quantum-enhanced metrology
arXiv:2011.06612 · doi:10.1103/PhysRevLett.126.210506
Abstract
We demonstrate that a many-body nonlocality is a resource for ultra-precise metrology. This result is achieved by linking the sensitivity of a quantum sensor with a combination of many-body correlation functions that witness the nonlocality. We illustrate our findings with some prominent examples---a collection of spins forming an Ising chain and a gas of ultra-cold atoms in any two-mode configuration.
7 pages, 3 figures
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