Speaker
Description
We experimentally investigate the entanglement of two spatially separated many particle systems. Our experiments are based on a two component pseudo spin-$1/2$ Bose Einstein condensate of $^{87}$Rb on an atom chip. By engineering the interatomic interactions through state dependent trapping we are able to produce entangled spin-squeezed states in this system. Using coherent spin manipulations we split this entangled many-particle state into two halves in spin space and magnetic field gradients allow us to separate the two two-component BECs spatially by more than 40 $\mu$m. Our technique allows us to individually address the collective spins of the two BECs after splitting thereby realizing arbitrary spin measurements on the two systems. Their correlations allow to infer measurement results of non-commuting spin observables in one system from measurements on the other, demonstrating the entanglement of the two Bose-Einstein condensed clouds of roughly 800 atoms each. Besides the interest in understanding fundamental aspects of entanglement of many-body systems, our experiments enable new investigations in quantum enhanced metrology using spatially split probes.
| Presenter name | Paolo Colciaghi |
|---|
