Ramsey interferometry with a spin embedded in a Coulomb chain

Gabriele De Chiara, Tommaso Calarco, Shmuel Fishman, Giovanna Morigi

Research output: Contribution to journalArticleResearchpeer-review

27 Citations (Scopus)


We show that the statistical properties of a Coulomb crystal can be measured by means of a standard interferometric procedure performed on the spin of one ion in the chain. The ion spin, constituted by two internal levels of the ion, couples to the crystal modes via spatial displacement induced by photon absorption. The loss of contrast in the interferometric signal allows one to measure the autocorrelation function of the crystal observables. Close to the critical point, where the chain undergoes a second-order phase transition to a zigzag structure, the signal gives the behavior of the correlation function at the critical point. © 2008 The American Physical Society.
Original languageEnglish
Article number043414
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number4
Publication statusPublished - 20 Oct 2008


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