Quantum leap: Graphene's triple-layer system unlocks unprecedented coherence control

A team of researchers led by Yassine Dakir has achieved precise control over quantum coherence and entanglement in a triple-layer graphene system. The breakthrough took place within a planar microcavity, opening new possibilities for quantum technologies. The study demonstrated that manipulating the number of cutoff modes, layer positioning, momentum, and interlayer rotation angles allows fine-tuning of quantum resources. Increasing cutoff modes broadens electromagnetic interactions, enhancing coupling between graphene layers and coherence.

The interlayer rotation angle plays a key role by altering the overlap of electronic wavefunctions. This directly impacts the strength of interlayer coupling and the resulting entanglement. Quantum coherence was measured using the relative entropy of coherence, proving sensitive to the design of the triple-layer graphene structures.

Entanglement levels reached values previously unseen in planar graphene systems. The highest tripartite tangle measurements recorded mark a significant step forward in quantum control, though sustained coherence times for real-world use remain unproven. This tunable system offers a platform for exploring vacuum-mediated quantum phenomena. It paves the way for advanced graphene-based photonic and optoelectronic devices. Applications could span quantum computing, communication, and sensing, using graphene as the foundation.