Are diamonds the missing link in quantum computing?

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YOKOHAMA, Japan – A new study suggests that faulty diamonds could be key to unlocking the next generation of computers and perhaps one day the quantum internet. Revolutionary new technologies that enable unhackable networks and information to travel faster than the speed of light could take a step closer due to the new discovery.

Capable of sending enormous amounts of data over long distances, similar to teleportation, quantum computers could be reached with the help of these flawed diamonds – atomic defects where carbon is replaced by nitrogen – that could provide a near-perfect interface. The only problem is that these magnetic field controlled diamond-nitrogen vacancy centers are incompatible with existing quantum devices.

Quantum computing is finding better or faster ways to solve problems, many of which are impossible with standard computers. Experts say they could solve in seconds what a normal machine would take years.

By combining the entangled emission demonstrated in this study with the previously demonstrated quantum teleportation transfer from a photon to a nuclear spin in diamond, the researchers will create quantum entanglement between distant locations based on quantum teleportation.

Quantum computers do this by replacing the binary on / off “bits” of classic computing with so-called “qubits” – essentially always “on”. Only a few quantum computing platforms are currently being developed worldwide.

In the study, scientists say the problem is like trying to connect an Altair, an early personal computer developed in 1974, to the Internet using Wi-Fi. Although the two technologies speak different languages, the first step is to help translate.

The team successfully used microwave and light polarized waves to entangle an emitted photon and left spin qubits, the quantum equivalent of information bits in classical systems. These polarizations are waves moving perpendicular to the source of origin, like seismic waves radiated horizontally from a vertical fault displacement.

In quantum mechanics, the spin property – either right-handed or left-handed – of the photon determines how the polarization moves, which means it is predictable and controllable. If entanglement is brought about via this property in a non-magnetic field, the connection appears to be resistant to other variables. This approach with the previous data transmission via teleportation and the resulting exchange of information should one day create a quantum Internet.

“To realize the quantum internet, a quantum interface is required to create distant quantum entanglement through photons, which are a quantum communication medium,” said co-author Hideo Kosaka of Yokohama National University in Japan in a statement. “The geometric nature of the polarizations enables us to create distant quantum entanglements that are resistant to noise and timing errors. The realization of a quantum internet will enable quantum cryptography, distributed quantum computation and quantum sensors over long distances of more than 1,000 km. “

The study is published in Communication physics.

South West News Service writer Joe Morgan contributed to this report.


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