Physicists have confirmed that distant particles really can influence each other and act in strange ways that can’t be explained by common sense or, for the most part, the laws of physics. This bizarre behaviour is what’s known as quantum ‘spookiness’, and despite plenty of experiments showing that it exists, this is the first time it’s been demonstrated with a loophole-free test, proving that Albert Einstein was wrong about quantum mechanics.
According to quantum theory, a particle’s nature doesn’t exist until it’s measured, which means it just hangs out in a superposition state until someone decides to check in on it. Particles can also be entangled, which means that they’re inextricably linked together, and their nature is only defined by being the opposite of the other one. So that means when you measure a particle, you’re not only determining its nature in that moment, you’re also defining the nature of its entangled partner. And that definition happens instantly, no matter how far apart the particles are. It’s for this reason that Einstein, and many other physicists, have doubted the existence of quantum entanglement, because it essentially means that information is passing between the two entangled particles faster than the speed of light (like we said, freaking weird).
This latest experiment involved physicists from the Netherlands, the UK, and Spain, who entangled pairs of electrons separated by a distance of 1.3 km. Led by Delft University of Technology researcher B. Hensen from the Netherlands, the team then measured one of the electrons while a group immediately observed whether its partner was affected. It was! Edited from and more here: ScienceAlert