Quantum-Mechanical Magic Trick

© Sean Garner and Lene V. Hau.

The orange coupling laser first illuminates a Bose-Einstein condensate from the right. A yellow input light pulse is injected from the left into the first condensate where it is slowed and then extinguished. A perfect matter copy (red) of the light pulse is created, and this messenger atom pulse travels across to the second condensate where the matter copy is converted back to light.