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 5x10(4) motivates the present theoretical and numerical investigation. The results are analyzed in comparison with the properties of the MQS based on parallel to alpha > 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.
Decoherence, environment-induced superselection, and classicality of a macroscopic quantum superposition generated by quantum cloning / DE MARTINI, Francesco; Sciarrino, Fabio; Spagnolo, Nicolo'. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 79:5(2009), pp. 052305-1-052305-10. [10.1103/physreva.79.052305]
Decoherence, environment-induced superselection, and classicality of a macroscopic quantum superposition generated by quantum cloning
DE MARTINI, Francesco;SCIARRINO, Fabio;SPAGNOLO, NICOLO'
2009
Abstract
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 5x10(4) motivates the present theoretical and numerical investigation. The results are analyzed in comparison with the properties of the MQS based on parallel to alpha > 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
