New protocol to "teleport" electrons in nanoscale devices
New protocol to "teleport" electrons in nanoscale devices
New protocol to "teleport" electrons in nanoscale devices
A team led by researchers from the Higher Council for Scientific Research (CSIC) (Spain) has developed a protocol to transfer quantum information between two distant regions directly. The work, published in the journal Nanotechnology, could be used in nanometric devices to "teleport" electrons and distant quantum states in space, which would open the door to manipulate artificial atoms or quantum bits, basic components of the computers of the future .
The developed protocol allows to transfer not only the charge of the electron, but also its spin (a property that manifests itself in extremely small devices), as well as its quantum states between distant regions, without occupying the central region. The nanometer device proposed by researchers consists of a chain of artificial atoms or quantum dots in which electrons are propagated.
"This transfer would be done by adiabatic electrical pulses, that is, low frequency, applied to the tunnel barriers that connect the quantum dots," explains CSIC researcher Gloria Platero, who works at the Materials Science Institute of Madrid.
Because the adiabatic protocols are slow and, therefore, the electron can interact with the medium and its electronic state can be modified, scientists have developed a theoretical model based on reverse engineering that accelerates the process. This prevents interaction with the medium and transfers the desired quantum state effectively.
Nanotechnology (Photo: F. Discover)
According to scientists, chains of up to 12 artificial atoms coupled together by electrostatic barriers have now been developed. Through them, the electrons are propagated by a resonant tunnel effect.
"The fact that there are several laboratories capable of experimentally implementing these systems allows the application of our protocol. We have shown that it is possible to transport electrons from one end to the other without occupying the intermediate region in nanoscale systems. Quantum processors, which require keeping the data transfer over long distances intact, could benefit from this work, "stresses the CSIC researcher. (Source: CSIC / DICYT)
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