10 milliKelvin is the temperature range that allows the usage of commercial RF equipment in the ~5GHz range to control the qubits. The relationship between the

10 milliKelvin is the temperature range that allows the usage of commercial RF equipment in the ~5GHz range to control the qubits. The relationship between the two is essentially Energy = k_B * temp = h * freq, where k_B is the Boltzmann constant and h is Planck's constant. If the temperature was higher than 10 milliKelvin, then thermal fluctuations could have comparable energy to your control signals and thus cause unintended electronic state transitions.