Ideal optical isolator with a two-cavity optomechanical system

Ideal optical isolator is indispensable for building quantum networks and ubiquitous in modern communication technology. Here, we study how to realize ideal optical isolator in a common two-cavity optomechanical system with optomechanical interaction and linearly-coupled interaction. The scheme relies on the interference between the two interactions. We derive the essential conditions to realize ideal optical isolator, especially for the case of...