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Efficient entanglement preservation in open quantum systems is a crucialscope towards a reliable exploitation of quantum resources. We address thisissue by studying how two-qubit entanglement dynamically behaves when two atomqubits move inside two separated identical cavities. The moving qubitsindependently interact with their respective cavity. As a main general result,we find that under resonant qubit-cavity interaction the initial entanglementbetween two moving qubits remains closer to its initial value as time passescompared to the case of stationary qubits. In particular, we show that theinitial entanglement can be strongly protected from decay by suitably adjustingthe velocities of the qubits according to the non-Markovian features of thecavities. Our results supply a further way of preserving quantum correlationsagainst noise with a natural implementation in cavity-QED scenarios and arestraightforwardly extendable to many qubits for scalability.

Protecting entanglement by adjusting the velocities of moving qubits inside non-Markovian environments