Related Experiment Video
Updated: Jan 28, 2026
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
15.0K
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.
Scientific Reports
|March 3, 2019
Summary
We developed a stable optical system using Sagnac interferometers to simulate non-Markovian dynamics. This allows us to observe information backflow in quantum systems by tracking photon entanglement.
Area of Science:
- Quantum optics
- Quantum information science
Background:
- Non-Markovian quantum dynamics describe systems with memory effects.
- Simulating these dynamics is crucial for understanding open quantum systems.
Purpose of the Study:
- To present a novel optical scheme for implementing stable and configurable non-Markovian dynamics.
- To demonstrate its capability in simulating the collisional model and quantifying information backflow.
Main Methods:
- Utilizing a multipass bulk geometry with two concatenated Sagnac interferometers.
- Employing a single photon qubit interacting with a vacuum environment at discrete times.
- Tracking the evolution of entanglement between a system photon and an ancillary photon.
Main Results:
- Successfully implemented three configurations: one Markovian and two non-Markovian scenarios.
- Quantified information backflow in non-Markovian regimes.
- Demonstrated the optical features and stability of the apparatus.
Conclusions:
- The proposed optical scheme provides a robust platform for studying non-Markovian quantum dynamics.
- This work offers insights into information backflow and entanglement evolution in open quantum systems.
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