(Pontificia Universidad Católica del Perú, 2022-07-26) Yugra Carcasi, Yonny Daniel; De Zela Martinez, Francisco Antonio
In this thesis, we address open quantum systems subjected to Markovian and non-
Markovian evolutions. We diagnose these two regimes using the relative entropy of
coherence. We specially address the case of two qubits encoded in the polarization
degree of freedom of photon beams. The two qubits play the roles of system and
ancilla. In our experimental setup, we need only two parameters to control Markovian
and non-Markovian regimes. We also propose and provide a proof-of-concept
for the implementation of a quantum gate that drives an open system so that it can
reach maximal coherence. Our ndings also illustrate possibilities for generating
non-Markovian processes, which are important to recover information that has gone
from the system to its environment. We thereby show how non-Markovianity can
be considered as a resource in open quantum systems.
