A special resonator can transmit quantum information using single photons of a silicon device with tens of erbium atoms.
A fully encrypted quantum internet that is not afraid of hacker attacks is getting closer and closer to realization thanks to a new development by scientists. Researchers from the Max Planck Institute for Quantum Optics and the Technical University of Munich have created a special resonator that allows encoded quantum information to be transmitted over the longest possible distance.
The quantum internet uses qubits to transmit data and has the ability to shatter into random information if someone tries to hack it. Therefore, interconnecting quantum systems requires the transfer of these qubits between quantum systems. Researchers have found a way to do just that, using erbium atoms implanted in silicon that will emit single photons encoded with this quantum information when excited with light through a fiber optic cable.
But to technically exploit these fundamental properties of erbium, it is necessary to excite the atoms to emit individual particles of light in a controlled manner. Now, thanks to the resonator, you can create an interface to send or receive quantum information.
In particular, the scientists’ nanophotonic resonator, which creates erbium atoms, has ideal properties for transmitting information, as it emits light at a wavelength of 1536 nanometers, the same wavelength used in classical fiber optic network communication.
However, unlike classical networks, this resonator does not need mirrors like other optical resonators, but instead uses a special crystalline silicon with regular nanometer-sized holes in the material. In general, the entire resonator is only a few micrometers in size and contains only a few tens of erbium atoms.
In fact, scientists say the manufacturing infrastructure for the quantum Internet has already been built and now it’s all about networking the entire quantum system.
Previously Focus He wrote that his new quantum computer can perform 1 million calculations per second.
Source: Focus
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