Wang, TishuoFang, JianxiongXie, ZhongyiDong, NenghaoJoglekar, Yogesh N.Wang, ZixinLi, JiamingLuo, Le2022-03-252022-03-252020-08Wang, T., Fang, J., Xie, Z., Dong, N., Joglekar, Y. N., Wang, Z., Li, J., & Luo, L. (2020). Observation of two PT transitions in an electric circuit with balanced gain and loss. The European Physical Journal D, 74(8), 167. https://doi.org/10.1140/epjd/e2020-10131-7https://hdl.handle.net/1805/28295We investigate 𝓟𝓣-symmetry breaking transitions in a dimer comprising two LC oscillators, one with loss and the second with gain. The electric energy of this four-mode model oscillates between the two LC circuits, and between capacitive and inductive energy within each LC circuit. Its dynamics are described by a non-Hermitian, 𝓟𝓣-symmetric Hamiltonian with three different phases separated by two exceptional points. We systematically measure the eigenfrequencies of energy dynamics across the three regions as a function of gain-loss strength. In addition to observe the well-studied 𝓟𝓣 transition for oscillations across the two LC circuits, at higher gain-loss strength, transition within each LC circuit is also observed. With their extraordinary tuning ability, 𝓟𝓣-symmetric electronics are ideally suited for classical simulations of non-Hermitian systems.enPublisher PolicyPT transitionsPT-symmetric electronicsgain-loss strengthArticle