Physicists first teleported a photon from one chip to another

Physicists led by Daniel Llewellyn have built a teleportation system. It consists of two parts. The first part is a transmitter whose dimensions are 5 × 3 millimeters. The second part is a 3.5 × 1.5 millimeter receiver. The transmitter is a network of nonlinear photon sources and linear quantum circuits.

The setup can teleport photons within one or two chips. During the experiment, they were at a distance of 10 meters from each other. The accuracy of teleportation (the degree of coincidence of quantum states) in the first mode is 0.906, in the second – 0.885. At the same time, in 2014, scientists with teleportation managed to achieve an indicator of about 0.89.

Teleportation begins when a system transmitter generates a pair of photons. Light quanta pass through a sensor that determines if they are entangled. Then, through the waveguide channels, the photon passes through the sensor to a linear quantum circuit and a receiver, which makes the same measurements with an interferometer as the transmitter. At the last stage, measurements are taken using the Mach – Zehnder interferometer system.

According to scientists, this teleportation scheme can be used in large-scale projects on integrated optics. In addition, increasing the accuracy of data transfer will give physicists the opportunity to create more efficient means of communication based on quantum teleportation.

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