Heralding quantum entanglement between two room-temperature atomic ensembles

Establishing quantum entanglement between individual nodes is crucial for building large-scale networks, enabling secure communications, distributed computing, enhanced metrology, and fundamental tests of mechanics. However, the shared entanglements have been merely observed in either extremely low-temperature or well-isolated systems, which limits networks real-life applications. Here, we report realization heralding two atomic ensembles at room temperature, are contained spatially separated, centimeter-sized vapor cells. By mapping state onto a photonic after readout process, measure interference Raman-scattered photons reconstruct entangled state, then strongly verify existence single excitation delocalized ensembles. The demonstrated block paves way to construct distributing across multiple remote ambient conditions.