UK imposes mysterious ban on quantum computer exports (newscientist.com)

The UK government has set limits on the capabilities of quantum computers that can be exported — starting with those above 34 qubits, and rising as long as error rates are also higher — and has declined to explain these limits on the grounds of national security. Experts say this make no sense and that it could harm the nascent UK quantum computer industry. Clearly 34 qubits is seen as an important milestone for some military or intelligence reason, but the rationale behind that belief is being kept behind closed doors.