  Multipartite entangled states involving non-locality are one of the most
fascinating characteristics of quantum mechanics. In this work, we propose a
thermal-dephasing-tolerant generation of mesoscopic entangled states with
Rydberg dressed atoms. We encode logical state on dressed states rather than
Rydberg states. Such treatment can increase the lifetime of multipartite
entanglement coherence to around 3 times compared to the Rydberg-state-coding
one at the same system size, and therefore induce solid fidelities of
mesoscopic superposition states generation. The current work theoretically
verifies the advantages of using Rydberg dressed states in many-body quantum
entanglement, which is helpful for large-scale quantum computation and
many-body Rydberg quantum simulation.
