(Phys.org)—Quantum bounds are numbers (such as 4,6, and 2√2) that naturally appear in quantum experiments, or similar to how the number π emerges in circles. But just as how π pops up in a wide variety of areas beyond circles,in a new study physicists gain found that quantum bounds are not exclusive to quantum theory but also emerge in purely classical experiments. The results propose that attempts to define quantumness should not be concerned with quantum bounds, since there is nothing inherently quantum about them.
Source: phys.org