Scientific Results

Control of entanglement dynamics in a system of three coupled quantum oscillators

Year: 2017

Authors: Gonzalez-Henao J.C., Pugliese E., Euzzor S., Meucci R., Roversi J.A., Arecchi F.T.

Autors Affiliation: Instituto de Física gleb Wataghin, Universidade Estadual de Campinas, Unicamp, Campinas, São Paulo, 13083-970, Brazil; Departamento de Física, Universidad de Sucre, Cra 28 No 5-267 Puerta Roja, Sincelejo, Sucre, Colombia; Istituto Nazionale di Ottica-CNR Largo E. Fermi 6, Firenze, 50125, Italy; Emeritus of Physics, Università degli Studi di Firenze, Firenze, Italy

Abstract: Dynamical control of entanglement and its connection with the classical concept of instability is an intriguing matter which deserves accurate investigation for its important role in information processing, cryptography and quantum computing. Here we consider a tripartite quantum system made of three coupled quantum parametric oscillators in equilibrium with a common heat bath. The introduced parametrization consists of a pulse train with adjustable amplitude and duty cycle representing a more general case for the perturbation. From the experimental observation of the instability in the classical system we are able to predict the parameter values for which the entangled states exist. A different amount of entanglement and different onset times emerge when comparing two and three quantum oscillators. The system and the parametrization considered here open new perspectives for manipulating quantum features at high temperatures.

Journal/Review: SCIENTIFIC REPORTS

Volume: 7      Pages from:   to:

KeyWords: Separability criterion
DOI: 10.1038/s41598-017-09989-2

English