A financial advisor <a href=" http://ornithology.com/bird-sighting/ ">viagra precio chile as</a> Lehnert is clear that that there is, undoubtedly, some subtlety when it comes to a demonstration of entanglement itself. "Evidence of entanglement comes from asking how well we can anticipate the measurement of the third pulse, based on our measurement of the second. That's a good operational notion of correlation," he says. If the pulses are indeed entangled, a measurement of the second pulse should allow the team to anticipate the outcome of the measurement of the third, with an uncertainty that is smaller than the fluctuations associated with the quantum vacuum fluctuations (a temporary change in the amount of energy in a point in space that comes about due to Heisenberg's uncertainty principle).