Decoherence, Einselection and Classicality of a Macroscopic Quantum Superposition generated by Quantum Cloning

Abstract

The high resilience to de-coherence shown by a recently discovered Macroscopic Quantum Superposition (MQS) generated by a quantum injected optical parametric amplifier (QI-OPA) and involving a number of photons in excess of 5x10^4 motivates the present theoretical and numerical investigation. The results are analyzed in comparison with the properties of the MQS based on coherent states and NOON states, in the perspective of the comprehensive theory of the subject by W.H.Zurek. In that perspective the concepts of "pointer state", "einselection" are applied to the new scheme.

10 pages, 7 figures

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Cited by in corpus (10)

• Investigating macroscopic quantum superpositions and the quantum-to-classical transition by optical parametric amplification
• Wigner-function theory and decoherence of the quantum-injected optical parametric amplifier
• Enhanced Resolution of Lossy Interferometry by Coherent Amplification of Single Photons
• Entanglement criteria for microscopic-macroscopic systems
• Anomalous lack of decoherence of the Macroscopic Quantum Superpositions based on phase-covariant Quantum Cloning
• Genuine multipartite nonlocality of entangled thermal states
• Coherent scattering of a Multiphoton Quantum Superposition by a Mirror-BEC
• Measurement-induced quantum operations on multiphoton states
• Anomalous resilient to decoherence macroscopic quantum superpositions generated by universally covariant optimal quantum cloning
• Entanglement and Quantum Superposition of a Macroscopic - Macroscopic system