Entangled objects cannot be described independently of each other, even though they may have an arbitrarily large spatial separation. "One of the drums responds to all the forces of the other drum in the opposing way, kind of with a negative mass," Sillanpää says.įurthermore, the researchers also exploited this result to provide the most solid evidence to date that such large objects can exhibit what is known as quantum entanglement. Breaking the rule allows them to be able to characterize extremely weak forces driving the drumheads. This means that the researchers were able to simultaneously measure the position and the momentum of the two drumheads - which should not be possible according to the Heisenberg uncertainty principle. In this situation, the quantum uncertainty of the drums' motion is cancelled if the two drums are treated as one quantum-mechanical entity," explains the lead author of the study, Dr. The drums vibrate in an opposite phase to each other, such that when one of them is in an end position of the vibration cycle, the other is in the opposite position at the same time. "In our work, the drumheads exhibit a collective quantum motion. The drumheads were carefully coerced into behaving quantum mechanically. ![]() ![]() Instead of elementary particles, the team carried out the experiments using much larger objects: two vibrating drumheads one-fifth of the width of a human hair. Matt Woolley from the University of New South Wales in Australia, who developed the theoretical model for the experiment. Mika Sillanpää at Aalto University in Finland has shown that there is a way to get around the uncertainty principle. In recent research, published in Science, a team led by Prof.
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