The unit cells can be imagined to function as qubits that maintain quantum coherence "long enough for the electromagnetic pulse to travel across".
Nanowires can use quantum dots as the unit cells or artificial atoms of the structure, arranged as periodic nanostructures.
This material demonstrates a negative index of refraction and effective magnetism and is simple to build.
[3] Quantum metamaterial prototypes based on superconducting devices with [9] [10] and without [11] Josephson junctions are being actively investigated.
Recently a superconducting quantum metamaterial prototype based on flux qubits was realized.