A team of researchers from China and Austria teleported three-level quantum states, also known as kutrits. The results of the study are published in the journal Physical Review Letters.
For the first time, scientists were able to successfully conduct such an experiment. Physicists were able to prove that kutrits have a unique opportunity to exist in several states at once.
Until now, scientists have managed to teleport only qubits – double quantum bits of information. The standard bit, considered mainly in the computing sciences, has only zero or one values. The qubit has both meanings.
Quantum teleportation is the ability to transfer the properties of one particle to another particle. For this, one or several paths must simultaneously pass a photon. Back in the nineties, scientists proved the theoretical possibility of multi-level quantum teleportation. Quantum cells are encoded in the possible paths that a photon can travel.
In a study presented by Austrian and Chinese scientists, the photon was simultaneously located in all three optical fibers. The core of quantum teleportation is the so-called Bell measurement, which is based on the principle of operation of a multi-beam splitter of light particles.
The splitter directs photons through several inputs and outputs, connecting together all the optical fibers.
The researchers also used auxiliary photons, which also went into a multipath splitter and could interfere with other light particles.
Experience has shown that quantum information can be transmitted from one particle to another at a distance without their physical interaction. In addition, this concept is not limited to three states, and theoretically it can extend to any number of quantum states.