An animation of the photonic quantum computer proposed by the researchers. On the left is the storage ring, which holds several counter-propagating photons. On the right is the scattering unit, which is used to manipulate the photonic qubits. The spheres at the top, called “Bloch spheres,” depict the mathematical state of the atom and one of the photons. Because the atom and the photon are entangled, manipulating the atom also affects the state of the photon. (Image credit: Ben Bartlett)
Today’s quantum computers are complicated to build, difficult to scale up, and require temperatures colder than interstellar space to operate. These challenges have led researchers to explore the possibility of building quantum computers that work using photons—particles of light...
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