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Generation of Highly Resilient to Decoherence Macroscopic Quantum Superpositions via Phase-covariant Quantum Cloning

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Abstract

In this paper we analyze the resilience to decoherence of the Macroscopic Quantum Superpositions (MQS) generated by optimal phase-covariant quantum cloning according to two coherence criteria, both based on the concept of Bures distance in Hilbert spaces. We show that all MQS generated by this system are characterized by a high resilience to decoherence processes. This analysis is supported by the results of recent MQS experiments of N=3.5×104 particles.

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Authors and Affiliations

  1. Dipartimento di Fisica, “Sapienza” Università di Roma, piazzale Aldo Moro 5, 00185, Rome, Italy

    Francesco De Martini, Fabio Sciarrino, Nicolò Spagnolo & Chiara Vitelli

  2. Accademia Nazionale dei Lincei, via della Lungara 10, 00165, Rome, Italy

    Francesco De Martini

  3. Istituto Nazionale di Ottica Applicata, largo Fermi 6, 50125, Firenze, Italy

    Fabio Sciarrino

  4. Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, piazzale Aldo Moro 5, 00185, Rome, Italy

    Nicolò Spagnolo & Chiara Vitelli

Authors
  1. Francesco De Martini
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  2. Fabio Sciarrino
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  3. Nicolò Spagnolo
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  4. Chiara Vitelli
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Correspondence to Francesco De Martini.

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De Martini, F., Sciarrino, F., Spagnolo, N. et al. Generation of Highly Resilient to Decoherence Macroscopic Quantum Superpositions via Phase-covariant Quantum Cloning. Found Phys 41, 492–508 (2011). https://doi.org/10.1007/s10701-010-9445-z

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  • DOI: https://doi.org/10.1007/s10701-010-9445-z

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