A problem with silicon crystals in Q-putting is that pairs need to be the same size or they give different results. These scientists created a solution that measures each crystal and makes a mathematical adjustment to correct the error.
https://phys.org/news/2017-07-physicists-appr...ubits.html
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Scientists have realized only recently that controlling valley states is critical for encoding and analyzing silicon-based qubits, because even the tiniest imperfections in a silicon crystal can alter valley energies in unpredictable ways.
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The technique also enabled the scientists, for the first time, to measure the extremely small energy difference between the two valleys—which had been impossible using any other existing method.
In the future, the researchers hope to use more sophisticated voltage pulses and device designs to achieve full control over multiple interacting valley-based qubits.
my comments-
Typically, the smaller the size of the nanocrystal, the harder to contol uniformity. Uniformity is critical in quantum computing. Below 1nm in size, we are in the atom scale. Most likely very difficult to make. On that basis, we have an argument for QMC to offer value added pricing - uniformity. If it can be done at all.
https://phys.org/news/2017-07-physicists-appr...ubits.html
quote-
Scientists have realized only recently that controlling valley states is critical for encoding and analyzing silicon-based qubits, because even the tiniest imperfections in a silicon crystal can alter valley energies in unpredictable ways.
quote-
The technique also enabled the scientists, for the first time, to measure the extremely small energy difference between the two valleys—which had been impossible using any other existing method.
In the future, the researchers hope to use more sophisticated voltage pulses and device designs to achieve full control over multiple interacting valley-based qubits.
my comments-
Typically, the smaller the size of the nanocrystal, the harder to contol uniformity. Uniformity is critical in quantum computing. Below 1nm in size, we are in the atom scale. Most likely very difficult to make. On that basis, we have an argument for QMC to offer value added pricing - uniformity. If it can be done at all.
