Torsten V. Zache

On an ordinary optical table, amid lasers and mirrors, a cloud of a hundred strontium-87 atoms begins to live by the laws of curved spacetime. Half a second later, its quantum interference fades: gravitational time dilation destroys the superposition.

Detecting a faint signal against a noise background is like trying to hear a distant bell in a storm. Ordinary amplification only makes the din more deafening. Quantum error correction solves the problem in an unexpected way.