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Abstract: Quantum particles have the ability to be very strongly correlated, a phenomenon called entanglement. In my talk I will explain how the presence of quantum correlations can assist in performing "impossible" computational tasks. I will then show how quantum correlations can be used to "remote control" any quantum system, with the help of a single auxiliary qubit. While these are man made, externally controlled applications of quantum correlations one can wonder if existing natural processes exploit their power. Indeed, ions in crystals, ions in trap experiments and bosons at low temperatures are all quantum correlated below a specific transition temperature. The role of entanglement here is to help “squeeze” the energy by forcing collective behaviour. Finally, I will argue that quantum correlations can exist between two spatial regions that are occupied by a single massive Boson and that this may be tested via a Bell-inequality. |