A new kind of resonator has the ability to transmit quantum information using single photons from a silicon device tipped with a few dozen erbium atoms.
The quantum internet just got one step closer to reality thanks to a new breakthrough that allows the encoded quantum information to be transmitted over distance.offers the promise of perfect information security on a quantum mechanical level in the transmission of information using qubits, which will decompose into random information if anyone were to try and intercept it.
. Connecting quantum systems together, then, requires the transmission of these qubits between quantum systems.The researchers have found a way to do exactly that, using erbium atoms implanted into silicon which, when excited by light using a fiberoptic cable, will emit single photons encoded with this quantum information.
, since they emit light at the wavelength of 1,536 nanometers, which is identical to the wavelength used in classical communications over a fiberoptic network. "The fact that this is possible in crystalline silicon offers an additional opportunity for the realization of quantum networks," Reiserer said, "because this material has been used for decades to produce classic semiconductor elements, for example microchips for computers, smartphones or navigation devices."
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