Science Alert October 16, 2022
To date, entanglement has generally been limited to microscopic quantum units such as pairs or multiples of single ions, atoms, photons, and so on. Previous studies had also reported on macroscopic quantum entanglement, all the necessary measurements were recorded rather than inferred, and the entanglement was generated in a deterministic, non-random way. An international team of researchers (Finland, Australia) have shown how it’s possible to measure the position and momentum of the two drumheads at the same time, getting around Heisenberg’s Uncertainty Principle working with macroscopic drums (oscillators) in a state of quantum entanglement. In this situation, the quantum uncertainty of the drums’ motion is canceled if the two drums are treated as one quantum-mechanical entity. They used entanglement to avoid quantum back action – essentially investigating the line between classical physics and quantum physics. According to the researchers one of the potential future applications of both sets of findings is in quantum networks – being able to manipulate and entangle objects on a macroscopic scale so that they can power next-generation communication networks…read more. TECHNICAL ARTICLEÂ
The macroscopic mechanical drums. Credit: J. Teufel/NIST