Quantum synchronization in one-dimensional topological systems

Abstract

The phenomenon of synchronization, where entities exhibit stable oscillations with aligned frequencies and phases, has been detected in diverse areas of natural science. It plays a crucial role in achieving frequency locking in multiple applications such as microwave communication and signal processing. The study of synchronization in quantum systems has gained significant interest, particularly in developing robust methods for synchronizing distant objects. Here, we demonstrate that synchronization between the boundary sites of one-dimensional generalized Aubry-André-Harper models can be induced through applying dissipation on the central sites. Two types of synchronization, stemming from the topological edge states, are characterized by the off-diagonal or diagonal correlations between the boundary sites. We analyze the relaxation rate to realize the synchronization and its acceleration with bulk dissipation. Remarkably, the synchronous oscillations maintain steady amplitude and frequency in the thermodynamic limit. Moreover, we show that the synchronization is robust against the perturbations in the Hamiltonian and initial states, highlighting its potential for practical implementation in quantum networks.