Generation of long-lived W states via reservoir engineering in dissipatively coupled systems

Very recently, dissipative coupling was discovered, which develops and broadens methods for controlling and utilizing light-matter interactions. Here, we propose a scheme to generate the tripartite W state in a dissipatively coupled system, where one qubit and two resonators simultaneously interact with a common reservoir. With appropriate parameters, we find the W state is a dark state of the system. By driving the qubit, the dissipatively coupled system will evolve from the ground state to the tripartite W state. Because the initial state is the ground state of the system and no measurement is required, our scheme is easy to implement in experiments. Moreover, the W state decouples from the common reservoir and thus has a very long lifetime. This scheme is applicable to a wide class of dissipatively coupled systems and we specifically illustrate how to prepare the W state in a hybrid qubit-photon-magnon system by using this scheme.

Automated summary

Recently, dissipative coupling was discovered, which provides new methods for controlling and utilizing light-matter interactions. In this study, we propose a scheme to generate the tripartite W state in a dissipatively coupled system, where one qubit and two resonators simultaneously interact with a common reservoir. By driving the qubit, the system evolves from the ground state to the tripartite W state, which has a long lifetime due to decoupling from the reservoir. This scheme is applicable to a wide range of dissipatively coupled systems and can be specifically applied to a hybrid qubit-photon-magnon system.