Now a voltage can be applied to the device and no current will flow until one of the superconducting films absorbs a photon, generating quasiparticles.

• 我们可以先在装置上施加电压，不让电流通过，直到超导体薄膜吸收光子，产生的准粒子跨越绝缘层而引发电流脉冲。