Young researchers conclude successfully their master thesis in Optics and Quantum Information

They obtained a high distinction in their thesis and had words to thank the training our Center researchers gave them.

Evelyn Acuña and Jorge FuenzalidaStudents Evelyn Acuña and Jorge Fuenzalida successfully completed their researches for Master of Science degree with special mention in Physics at the Universidad de  Concepción. The young Cefop’s researchers, who were part of Quantum Optics and Quantum Information Division from their undergraduate phase, presented their work on Thursday 28 and Friday 29 August respectively, under Dr. Gustavo Lima guidance.

In first place, Evelyn Acuña presented the work “Spatial entanglement concentration of twin photons” which involved conceptualizing a method for increasing the amount of entanglement between these particles.

“In practice, for various reasons there is a decrease in entanglement degree, to propagate through a medium one bi-photonic state generated by spontaneous parametric down conversion (SPDC),” Evelyn explained.

The researcher noted that spatial entanglement concentration may be applied in various protocols, with applications to any method which contains a spatial filter and need to increase the quality of processes.

Meanwhile, Jorge Fuenzalida worked with quantum states in his thesis “Experimental Implementation of a sequential unambiguous state discrimination” (between two observers). “There is a new protocol in which a pair of quantum states prepared by Alice (point A) can be discriminated by several observers with a non-zero probability, and experimentally, we use this principle with modified Sagnac type interferometer”, he said.

The student also thanked Dr. Fabio Sciarrino collaboration to his initial work. Sciarrino is a researcher at the University of La Sapienza (Italy) and a Cefop’s contributor. “He helped us with his expertise to properly align the Sagnac interferometer, thus changing the optical fiber of a multi-mode to single-mode, changing the alignment of the interferometer”, he said.

The recent graduates also had words to thank the training our Center researchers gave them, and hope in the near future to expand the experience in the experimental area of Optics and Quantum Information.



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