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Decoherence and quantum entanglement are two aspects of quantum technology that often conflict with one another. Think of them as competing forces.
Typically, quantum teleportation depends on entangled qubits, which are properly coupled pairs of particles. However, decoherence, which breaks these links, can easily cause problems.
A novel approach to solving this issue has been put forth by researchers from the Universities of Science and Technology of China, Hefei, and Turku, Finland.
The new technique makes it possible to teleport in a high-quality manner even in loud areas.
Professor Jyrki Piilo of the University of Turku stated in a statement that the work “is based on an idea of distributing entanglement — before running the teleportation protocol — beyond the used qubits, i.e., exploiting the hybrid entanglement between different physical degrees of freedom.”
Using noise for transmission
Moving the state of a quantum particle, also known as a qubit, from one location to another can be used to teleport the particle without actually sending it. This transmission requires quantum resources, such as entanglement between an additional pair of qubits.
The qubit state can be perfectly transmitted and transported in an ideal world. However, the noise and disturbances that real-world systems are prone to reducing and even eliminating the quality of teleportation.
The current technique makes use of the hybrid entanglement that results from the combination of photon frequency and polarization instead of the traditional method of using photon polarization to entangle qubits in teleportation.
“This permits a noteworthy modification in the manner in which the noise impacts the protocol; in fact, our finding flips the noise’s role from detrimental to advantageous for teleportation,” Piilo stated.
When hybrid entanglement and silence are present initially, as well as when noise is present along with normal qubit entanglement, the teleportation protocol breaks down.
However, Olli Siltanen, whose PhD dissertation revealed the theoretical aspect of the current discovery, noted that “the teleportation and quantum state transfer occur in an almost perfect manner when we have hybrid entanglement and add noise.”
An important development in quantum protocol
The discovery, according to the team, enables almost flawless teleportation using photons, even when certain types of noise are present.
The scientists have used photons in a variety of experiments to investigate different facets of quantum physics at their lab. But they also emphasize how exciting and fulfilling it was for them to see this extremely difficult teleportation experiment successfully completed.
Professor Chuan-Feng Li of the University of Science and Technology of China, Hefei, stated, “In the context of one of the most important quantum protocols, this is a significant proof-of-principle experiment.”
There are important applications for teleportation, such quantum information transfer, and it is important to create techniques that protect this transmission from interference and open up more quantum applications.
The study’s findings open up new avenues for investigation into applying the methodology to other noise sources and quantum protocols. They also provide important new insights.
The scientists have used photons in a variety of experiments to investigate different facets of physics at their lab. But they also emphasize how exciting and fulfilling it was for them to see this extremely difficult teleportation experiment successfully completed.
The scientists have used photons in a variety of experiments to investigate different facets of physics at their lab. But they also emphasize how exciting and fulfilling it was for them to see this extremely difficult teleportation experiment successfully completed.
The scientists have used photons in a variety of experiments to investigate different facets of physics at their lab. But they also emphasize how exciting and fulfilling it was for them to see this extremely difficult teleportation experiment successfully completed.
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Near-perfect quantum teleportation achieved by harnessing noise (msn.com)