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According to a news release from the University of Rochester, researchers have been able to apply a newly developed method called direct measurement to measure a 27-dimensional quantum state in a single experiment with no post-processing. Utilizing a technique known as quantum tomography, this would have normally been a multistage process. Methods such as direct measurement could be crucial in forming high security quantum communications system, as well as to exploring our understanding of quantum mechanics.
“Our work shows that direct measurement offers an exciting alternative to quantum tomography,” posited Robert Boyd, Professor of Optics and Physics at the University of Rochester and Canada Excellence Research Chair in Quantum Nonlinear Optics at the University of Ottawa. “As the field of quantum information continues to advance, we expect direct measurement to play an increasingly important role in this.”