Random Amplification with Bell Tests

Abstract

Randomness is a regular part of our (more or less) daily lives: from drawing lottery numbers to running computer simulations and the security of cryptographic schemes, various applications rely on random numbers. But does true randomness actually exist? If so, can we create truly random numbers in our labs? Luckily, the intrinsic randomness of quantum mechanics can be harnessed to generate truly random numbers – if we had access to perfect quantum devices. But quantum mechanics offers even more: it allows to create perfect randomness from an imperfect and even publicly accessible source. I will discuss the importance of such a resource for various applications and how it can be realised using a Bell test. Additionally, I will present an experimental realization of this protocol using superconducting qubits.