Year: 2014
Type: article
Abstract: We demonstrate that memory in an $N$-qubit system subjected to decoherence, is a potential resource for the slowdown of the entanglement decay. We show that this effect can be used to retain the sub-shot-noise sensitivity of the parameter estimation in quantum interferometry. We calculate quantum Fisher information, which sets the ultimate bound for the precision of the estimation. We also derive the sensitivity of such a noisy interferometer, when the phase is either estimated from the measurements of the population imbalance or from the one-body density.
Source: Physical Review A
Authors: P. Szańkowski, M. Trippenbach, J. Chwedeńczuk
Institution: University of Warsaw
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
Award: G6780011775
OpenAlex ID: W2071635717