Fast, High-Quality Random Numbers from Irradiated Josephson Junctions
Random number generators are crucial for applications such as Monte Carlo simulations and cryptography, but true randomness is hard to produce.
Most practical instances rely on pseudorandom generators or employ costly physical measurements to achieve true randomness, limiting their effectiveness.
Researchers have explored using white noise from a Josephson junction irradiated with high-frequency radio waves as a form of random number generation.
A Josephson junction consists of a pair of superconductors separated by a weak link, such as a barrier or insulator.
Due to quantum effects, a current continuously flows without the application of a voltage.
High frequency radio waves applied to Josephson junctions produce chaotic noise that could improve cryptographic algorithms and Monte Carlo simulations.
Author's summary: Josephson junctions can generate true random numbers.
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