From Eric Kvaalen, Les Essarts-le-Roi, France
Roger French asks whether anyone is working on using quantum entanglement to achieve instant communication with Mars. But entanglement can’t be used to transmit a signal. All it means is that if someone on Earth measures a property of one particle and someone (or an avatar) on Mars measures that property of another particle that is entangled with the first, the results will be the same(Letters, 31 May).
