Optomechanically induced tunable ideal nonreciprocity in optomechanical system with Coulomb interaction

The article delves into the theoretical realization of tunable ideal nonreciprocity in optomechanical systems, a fundamental requirement for classical and quantum information processing. By employing Coulomb interaction between charged mechanical modes and leveraging quantum interference, the authors demonstrate a novel approach to achieve nonreciprocal optical transmission without the need for magnetic fields. This method offers a significant advancement over traditional magneto-optical approaches, paving the way for miniaturized and integrated nonreciprocal devices such as optical isolators and circulators. The authors present a detailed model and Hamiltonian expressions for a multimode optomechanical system, solving the quantum Langevin equations to analyze the system dynamics and optical nonreciprocity response. The study highlights the influence of phase differences, cavity decay rates, Coulomb coupling strengths, and intercavity tunneling strengths on the nonreciprocal response, providing a comprehensive understanding of the underlying physics. The article concludes with practical insights into the conditions required for achieving ideal optical nonreciprocity, making it a valuable resource for researchers in the field of optomechanics and quantum optics.