Entanglement and Decoherence in a Microscopic-Macroscopic system
Nicolò Spagnolo, Chiara Vitelli, Fabio Sciarrino, F. De Martini, Alexander I. Lvovsky · AIP conference proceedings · 2009
We investigate the quantum features, entanglement and resilience to losses, of multiphoton fields generated by optical amplification of photon entangled states. We first report the realization of a class of Microscopic‐Macroscopic entangled states of more than 5×104 photons, based on parametric amplification of single‐photon and two‐photons states. A non‐locality CHSH‐type test has been performed on this system. Then, we apply a decoherence model to this Micro‐Macroscopic entangled state, showing their high resilience to photon‐loss. The theoretical results are in full agreement with many experimental observations.