  Strong local passivity is a property of multipartite quantum systems from
which it is impossible to extract energy locally. Surprisingly, if the strong
local passive state displays entanglement, it could be possible to locally
activate energy density by adding classical communication between different
partitions of the system, through so-called "quantum energy teleportation"
protocols. Here, we report both the first experimental observation of local
activation of energy density on an entangled state and the first realization of
a quantum energy teleportation protocol using nuclear magnetic resonance on a
bipartite quantum system.
