Scientific Results

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

Year: 2011

Authors: De Martini F., Sciarrino F., Spagnolo N., Vitelli C.

Autors Affiliation: Dipartimento di Fisica, “Sapienza” Università di Roma, piazzale Aldo Moro 5, 00185 Rome, Italy;
Accademia Nazionale dei Lincei, via della Lungara 10, 00165 Rome, Italy;
CNR – Istituto Nazionale di Ottica, Largo Fermi 6, 50125 Firenze, Italy; Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, piazzale Aldo Moro 5, 00185 Rome, Italy

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=3.5×10(4) particles.

Journal/Review: FOUNDATIONS OF PHYSICS

Volume: 41 (3)      Pages from: 492  to: 508

KeyWords: Macroscopic quantum superposition; Decoherence; Phase-covariant cloning
DOI: 10.1007/s10701-010-9445-z

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English