Generating and protecting correlated quantum states under collective dephasing
Anno: 2016
Autori: Carnio EG., Buchleitner A., Gessner M.
Affiliazione autori: Univ Freiburg, Inst Phys, Hermann Herder Str 3, D-79104 Freiburg, Germany; Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England; Univ Freiburg, Freiburg Inst Adv Studies, Albertstr 19, D-79104 Freiburg, Germany; CNR INO, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy; Ist Nazl Ric Metrol INRiM, I-10135 Turin, Italy.
Abstract: Westudy the collective dephasing process of a system of non-interacting atomic qubits, immersed in a spatially uniform magnetic field of fluctuating intensity. The correlation properties of bipartite states are analysed based on a geometric representation of the state space. Particular emphasis is put on the dephasing-assisted generation of states with a high correlation rank, which can be related to discordtype correlations and allow for direct applications in quantum information theory. Finally we study the conditions that ensure the robustness of initial entanglement and discuss the phenomenon of time-invariant entanglement.
Giornale/Rivista: NEW JOURNAL OF PHYSICS
Volume: 18 Da Pagina: 73010-1 A: 73010-19
Maggiori informazioni: MG thanks the German National Academic Foundation for their support. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 641277.Parole chiavi: entanglement; quantum correlations; dephasing; decoherenceDOI: 10.1088/1367-2630/18/7/073010Citazioni: 12dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-09-01Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui