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Seminários da Óptica e Informação Quântica – Vitalie Eremeev

6 de julio de 2022-3:30 PM - 5:30 PM

High-fidelity synchronization and transfer of quantum states in
optomechanical hybrid systems
Vitalie Eremeev

(Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Santiago, Chile)


In a hybrid quantum system, consisting of a three-level atom, cavity and mechanical oscillator (see Fig. 1a), we study the effects of synchronization and transfer of nonclassical states between the mechanical oscillator and the cavity field. As results, we show that an initially thermalized mechanical oscillator when connected to a squeezed bath, it evolves to a squeezed state which in steady state is synchronized with the cavity mode (see Fig. 1b). On the other hand, if the mechanical oscillator is initially prepared in a nonclassical state, e.g. squeezed and Schroedinger’s cat states, while the cavity is in a thermal state, then a periodic transfer between the mechanical oscillator and cavity mode occurs for given interaction times. As qualitative results, we prove that the synchronization and transfer of the quantum states are feasible with high fidelity. These effects are realizable in the regime of weak optomechanical coupling; however the fidelity can be improved by enhancing the optomechanical and Jaynes-Cummings couplings and reducing the loss rates, which is technologically attainable nowadays. 
 Reference: H. Molinares, V. Eremeev, M. Orszag, Phys. Rev. A 105, 033708 (2022).








Grupo de Óptica e Informação Quântica
Instituto de Física UFRJ


6 de julio de 2022
3:30 PM - 5:30 PM
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Grupo de Óptica e Informação Quântica

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