title: Deterministic generation of large scale atomic W states.
abstract: We present a deterministic scheme for generating large-scale atomic W states in a cavity QED system via a simple expansion mechanism, which is realized only by a detuned interaction between two identical atoms and a vacuum cavity mode. With the presented scheme, a W-type Bell pair can be created and an n-atom W state can be expanded to a 2n-atom W state with a unit probability of success in principle. No multi-atom gates, quantum memories or quantum non-demolition measurements are required, greatly simplifying the experimental realization of the scheme. The feasibility analysis shows that our expansion scheme can be implemented with state-of-the-art technologies. Our scheme enables advances not only in quantum information and communication but also in quantum thermodynamics, where atomic W states plays a crucial role.
authors.forename: Xue-Ping
authors.initials: XP
authors.lastname: Zang
authors.forename: Ming
authors.initials: M
authors.lastname: Yang
authors.forename: Fatih
authors.initials: F
authors.lastname: Ozaydin
authors.forename: Wei
authors.initials: W
authors.lastname: Song
authors.forename: Zhuo-Liang
authors.initials: ZL
authors.lastname: Cao