2009/01/31 by Francesco De Martini, Fabio Sciarrino, Nicolò Spagnolo +1 · 1 citation
Computer Science · Physics and Astronomy · #Cloning (programming) #Computer science #Open quantum system #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum cloning #Quantum decoherence #Quantum error correction #Quantum mechanics #Quantum superposition #Superposition principle #Superselection #quant-ph
paper · pdf · doi:10.1103/physreva.79.052305
10 pages, 7 figures
arxiv created 2009/04/09 · openalex publication_date 2009/05/06 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The high resilience to decoherence shown by a recently discovered macroscopic quantum superposition (MQS) generated by a quantum-injected optical parametric amplifier and involving a number of photons in excess of 5\ifmmode×\else\texttimes\fi104 motivates the present theoretical and numerical investigation. The results are analyzed in comparison with the properties of the MQS based on |\ensuremathα⟩ and N-photon maximally entangled states (NOON), in the perspective of the comprehensive theory of the subject by Zurek. In that perspective the concepts of ``pointer state'' and ``environment-induced superselection'' are applied to the new scheme.