Storing quantum states in bosonic dissipative networks

TL;DR

This paper investigates how to optimize dissipative quantum oscillator networks for dynamic storage of quantum superpositions, showing that decoherence time scales with network size under certain conditions.

Contribution

It introduces optimal network topologies for quantum state storage and analyzes how decoherence time depends on network size and parameters.

Findings

Decoherence time is proportional to the number of oscillators in the network.

Optimal topologies enhance the duration of quantum superposition storage.

Dynamic evolution allows for effective quantum state protection during storage.

Abstract

Considering a network of dissipative quantum harmonic oscillators we deduce and analyze the optimum topologies which are able to store, for the largest period of time, a quantum superposition previously prepared in one of the network oscillators. The storage of the superposition is made dynamically, in that the state to be protected evolves through the network before being retrieved back in the oscillator where it was 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.