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Browsing by Author "Facchi, Paolo"

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Browsing by Author "Facchi, Paolo"

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  • Rossini, Davide; Facchi, Paolo; Fazio, Rosario; Florio, Giuseppe; Lidar, Daniel A.; Pascazio, Saverio; Plastina, Francesco; Zanardi, Paolo (2008-07-04)
    We analytically and numerically study the effects of pulsed control on the decoherence of a qubit coupled to a quantum spin bath. When the environment is critical, decoherence is faster and we show that the control is ...
  • Yuasa, Kazuya; Facchi, Paolo; Fazio, Rosario; Nakazato, Hiromichi; Ohba, Ichiro; Pascazio, Saverio; Tasaki, Shuichi (American Physical Society, 2009-05-11)
    Under appropriate circumstances the electrons emitted from a superconducting tip can be entangled. We analyze these nonlocal correlations by studying the coincidences of the field-emitted electrons and show that electrons ...
  • Florio, Giuseppe; Facchi, Paolo; Fazio, Rosario; Giovannetti, Vittorio; Pascazio, Saverio (2007-10-24)
    Non Abelian geometric phases are attracting increasing interest because of possible experimental application in quantum computation. We study the effects of the environment (modelled as an ensemble of harmonic oscillators) ...
  • Trullo, Antonio; Facchi, Paolo; Fazio, Rosario; Florio, Giuseppe; Giovannetti, Vittorio; Pascazio, Saverio (2007-10-31)
    Geometric phases are an interesting resource for quantum computation, also in view of their robustness against decoherence effects. We study here the effects of the environment on a class of one-qubit holonomic gates that ...
  • Smacchia, Pietro; Amico, Luigi; Facchi, Paolo; Fazio, Rosario; Florio, Giuseppe; Pascazio, Saverio; Vedral, Vlatko (American Physical Society, 2011-08-02)
    We study a Hamiltonian system describing a three-spin-1/2 cluster-like interaction competing with an Ising-like anti-ferromagnetic interaction. We compute free energy, spin correlation functions and entanglement both in ...