Storing quantum states in bosonic dissipative networks

By considering a network of dissipative quantum harmonic oscillators, we deduce and analyse the optimum topologies which are able to store quantum superposition states, protecting them from decoherence, for the longest period of time. The storage is made dynamically, in that the states to be protected evolve through the network before being retrieved back in the oscillator where they were prepared. The decoherence time during the dynamic storage process is computed and we demonstrate that it is proportional to the number of oscillators in the network for a particular regime of parameters.

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

FAPESP

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

CNPq

Brazilian agencies