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Updated: Jan 28, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
All-optical implementation of collision-based evolutions of open quantum systems
Álvaro Cuevas1, Andrea Geraldi2, Carlo Liorni2,3
1Department of Physics, University of Rome La Sapienza, Piazzale Aldo Moro 5, 00185, Rome, Italy. alvaro.cuevas@uniroma1.it.
Abstract:
We present a new optical scheme enabling the implementation of highly stable and configurable non-Markovian dynamics. Here one photon qubit can circulate in a multipass bulk geometry consisting of two concatenated Sagnac interferometers to simulate the so called collisional model, where the system interacts at discrete times with a vacuum environment. We show the optical features of our apparatus and three different implementations of it, replicating a pure Markovian scenario and two non-Markovian ones, where we quantify the information backflow by tracking the evolution of the initial entanglement between the system photon and an ancillary one.
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