Problems may be solutions and people at oxford have proved it again, when Scientists attempting to build quantum computers are frustrated by the way that quantum entangled systems suffer from interference from their surroundings some of them have found a way to harness this sensitivity to create a system that responds to extremely weak magnetic fields.
Such sensors can detect fluctuations in the Earth’s magnetic field which might suggest any
reserves of gas or oil. They can be as well employed to do geographic surveys.
The heart of this system lies in the ‘cat state’, a state where the qubits are in an equal superposition of all being |0> and all being |1>. In simple words it is a state composed of two diametrically opposed conditions at the same time. This system was named after Schrödinger’s cat, since there quantum mechanics predicts the cat to be ‘dead’ and alive at the same time.
