If you’re being random on a budget, the Australian National University has you covered. They have set up their own quantum random-number generator by listening to the sound of nothing. Even in a vacuum of nothingness, there is something going on. Thanks to the quirks of quantum mechanics, it is possible for a particle and its antiparticle mate to spontaneously appear from literally nowhere and then annihilate each other faster than the universe can notice that they shouldn’t be there. This means empty space is actually a writhing foam of particles popping in and out of reality.
In the Department of Quantum Sciences at ANU, they have a detector listening to a vacuum, converting the quantum foam into random numbers, and then streaming them live at https://qrng.anu.edu.au, around the clock. For tech people, they have a great range of secure delivery systems (never use the built-in random.random() function in the Python programming language again!). And if you are a background-noise hipster, they have an audio version so you can listen in to the sounds of random.
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This website offers true random numbers to anyone on the internet. The random numbers are generated in real-time in our lab by measuring the quantum fluctuations of the vacuum. The vacuum is described very differently in the quantum physics and classical physics. In classical physics, a vacuum is considered as a space that is empty of matter or photons. Quantum physics however says that that same space resembles a sea of virtual particles appearing and disappearing all the time. This is because the vacuum still possesses a zero-point energy. Consequently, the electromagnetic field of the vacuum exhibits random fluctuations in phase and amplitude at all frequencies. By carefully measuring these fluctuations, we are able to generate ultra-high bandwidth random numbers.
https://qrng.anu.edu.au/
https://qrng.anu.edu.au/random-bernoulli-noise/