Insider Brief
Researchers at ETH Zurich demonstrated a method to generate mathematically certifiable perfect randomness using entangled quantum bits and an advanced Bell test, addressing a long-standing challenge in cryptography and digital security.
The team used two superconducting qubits connected by a 30-meter cryogenic link and combined imperfect random inputs with quantum measurements and specialized algorithms to amplify weak randomness into fully random sequences.
The researchers said the work could support future applications in encryption, quantum-secure communications, blockchain systems, lotteries, and other digital infrastructure that depends on highly reliable random number generation.
Andreas Wallraff and Renato Renner (f.l.t.r.) next to the 30-meter link connecting two quantum chips. Using this experiment, ETH researchers generated certified perfect randomness for the first time. (Kilian Kessler / ETH Zurich)
