We provide an experimental framework where periodically driven $\mathcal{P}\mathcal{T}$-symmetric systems can be investigated. The setup, consisting of two ultra high frequency oscillators coupled by a time-dependent capacitance, demonstrates a cascade of $\mathcal{P}\mathcal{T}$-symmetric broken domains bounded by exceptional point degeneracies. These domains are analyzed and understood using an equivalent Floquet frequency lattice with local $\mathcal{P}\mathcal{T}$ symmetry. Management of these $\mathcal{P}\mathcal{T}$-phase transition domains is achieved through the amplitude and frequency of the drive.

• Received 13 February 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.093901