Squeezing and entangling nuclear spins in helium 3
  We present a realistic model for transferring the squeezing or the entanglement of optical field modes to the collective ground state nuclear spin of $^3$He using metastability exchange collisions. We discuss in detail the requirements for obtaining good quantum state transfer efficiency and study the possibility to readout the nuclear spin state optically. 
Gael Reinaudi (LKB - Lhomond), Alice Sinatra (LKB - Lhomond), Aurelien   Dantan (LKB - Jussieu), Michel Pinard (LKB - Jussieu)