IMAGINE having two coins, both equally likely to give heads or tails when flipped, but which amazingly always give the same result no matter how far apart they are. This is the strange world of quantum entanglement – a phenomenon widely considered fundamental for quantum computing to become a reality.
Quantum computing relies on information being stored in quantum bits, or qubits, which can exist in two states at once and could therefore do multiple calculations simultaneously. Researchers have already created particles in which one or two properties such as energy or momentum are entangled. Now Paul Kwiat and his colleagues…
