Quantum effects on capacitively coupled intrinsic Josephson junctions Original Research Article

We numerically study quantum effects in intrinsic Josephson junctions of layered high-TcTc superconductors in order to explain recent experimental observations on the switching rate enhancement in the low temperature quantum regime. We pay attention to the capacitive coupling between neighboring junctions and perform simulations for the Schrödinger equation derived from the Hamiltonian describing the capacitive coupling. The simulation results reveal that the phase dynamics show synchronous behaviors when entering the quantum regime. This is qualitatively consistent with the experimental result.