Digital physics is a speculative idea suggesting that the universe can be conceived of as a vast, digital computation device, or as the output of a deterministic or probabilistic computer program.
[1] The hypothesis that the universe is a digital computer was proposed by Konrad Zuse in his 1969 book Rechnender Raum[2] ("Calculating-space").
[5] Fredkin encouraged the establishment of a digital physics group at what was then MIT's Laboratory for Computer Science, with Tommaso Toffoli and Norman Margolus playing key roles.
Moreover, existing models of digital physics violate various well-established features of quantum physics, as they belong to a class of theories involving local hidden variables.
[8][9] Despite these challenges, covariant discrete theories can be formulated that preserve the aforementioned symmetries.