Quantum computers are apparently a "national security risk" for some countries, which have mysteriously issued identical restrictions on exports of quantum computing systems. France, Spain, the United Kingdom, the Netherlands, and Canada have all restricted the sale of quantum computers containing more than 34 qubits and above a certain error threshold.
The quantum computing export bans across all these countries have matching specific qualifications for what makes a quantum computer "dangerous enough" to deserve a ban. New Scientist, which first broke the news, contacted dozens of countries asking about the bans and was rebuffed, with the UK claiming that explaining the rationale behind the numbers would be a national security risk.
