Loschmidt echo for quantum metrology

Anno: 2016

Autori: Macri t., Smerzi A., Pezze L.

Affiliazione autori: Univ Fed Rio Grande do Norte, Dept Fis Teor & Expt, Natal, RN, Brazil; Int Inst Phys, Natal, RN, Brazil; INO CNR, QSTAR, Largo Enrico Fermi 6, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 6, I-50125 Florence, Italy.

Abstract: We propose a versatile Loschmidt echo protocol to detect and quantify multiparticle entanglement. It allows us to extract the quantum Fisher information for arbitrary pure states, and finds direct application in quantum metrology. In particular, the protocol applies to states that are generally difficult to characterize, as non-Gaussian states, and states that are not symmetric under particle exchange. We focus on atomic systems, including trapped ions, polar molecules, and Rydberg atoms, where entanglement is generated dynamically via long-range interaction, and show that the protocol is stable against experimental detection errors.

Giornale/Rivista: PHYSICAL REVIEW A

Volume: 94 (1)      Da Pagina: 10102-1  A: 10102-6

Maggiori informazioni: We thank C. Gross, D. Linnemann, T. Pohl, P. Schauss, A.M. Rey, and J. Bollinger for useful discussions and insights. T.M. acknowledges CNPq for support through the fellowship Bolsa de produtividade em Pesquisa n. 311079/2015-6.
Parole chiavi: Multiparticle Entanglement; Fisher Information; Generation; Hundreds; States; Atoms
DOI: 10.1103/PhysRevA.94.010102

Citazioni: 119
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-11
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