A quantum-entangled photon traveled 35 kilometers beneath the streets of Boston

When the photon interacts with the quantum reminiscence, it turns into entangled with the reminiscence – which means that measurements carried out on both the photon or the reminiscence would supply data on (and thus alter) the state of the opposite.On the other hand, as an alternative of measuring the photon (and thus extracting the tips), the photon undergoes quantum frequency conversion from visual frequency (the place the quantum reminiscence operates) to telecom frequency (the place losses in optical fiber are minimized). The (now telecom-frequency) photon then makes a spherical travel thru an underground fiber community earlier than returning to Harvard, the place it’s transformed again to visual frequency.This adventure completed, the photon is bounced off a unique quantum reminiscence in a unique lab, thus moving the entanglement from the photon onto this 2d reminiscence. In spite of everything, the photon, having bounced off the second one reminiscence, is then routed to a detector which notes the presence of a photon, however does no longer divulge any of the underlying quantum data contained within the gentle.It entangled with the reminiscence — which means that measuring both the photon or the reminiscence modifies the state of the opposite. The photon then converts from a visual frequency to a telecom frequency, which then bounces to another lab, thus finishing the adventure. 

Author: OpenAI