What's new in quantum computing: " "The main prob
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Posted On: 04/17/2019 6:47:02 PM
What's new in quantum computing:
" "The main problem is that to get the quantum dots to interact requires them to be ridiculously close—nanometres apart. But at this distance they interfere with each other, making the device too difficult to tune to conduct useful calculations."
The solution was to allow entangled electrons to mediate their information via a 'pool' of electrons, moving them further apart.
He said: "It is kind of like having a bus—a big mediator that allows for the interaction of distant spins. If you can allow for more spin interactions, then quantum architecture can move to two-dimensional layouts."
Associate Professor Ferdinand Kuemmeth from the Niels Bohr Institute in Copenhagen said: "We discovered that a large, elongated quantum dot between the left dots and right dots, mediated a coherent swap of spin states, within a billionth of a second, without ever moving electrons out of their dots.
Professor Bartlett said: "What I find exciting about this result as a theorist, is that it frees us from the constraining geometry of a qubit only relying on its nearest neighbours."
https://phys.org/news/2019-04-world-record-qu...teams.html
" "The main problem is that to get the quantum dots to interact requires them to be ridiculously close—nanometres apart. But at this distance they interfere with each other, making the device too difficult to tune to conduct useful calculations."
The solution was to allow entangled electrons to mediate their information via a 'pool' of electrons, moving them further apart.
He said: "It is kind of like having a bus—a big mediator that allows for the interaction of distant spins. If you can allow for more spin interactions, then quantum architecture can move to two-dimensional layouts."
Associate Professor Ferdinand Kuemmeth from the Niels Bohr Institute in Copenhagen said: "We discovered that a large, elongated quantum dot between the left dots and right dots, mediated a coherent swap of spin states, within a billionth of a second, without ever moving electrons out of their dots.
Professor Bartlett said: "What I find exciting about this result as a theorist, is that it frees us from the constraining geometry of a qubit only relying on its nearest neighbours."
https://phys.org/news/2019-04-world-record-qu...teams.html
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