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New applications of graphene drums may be useful as quantum memory
Researchers at TU Delft have made small graphene drums that can be used as memory chips in quantum computers. They used photons to "hit" the drum.
Light particles have little power, but because graphene has an extremely low mass, the researchers at TU Delft were able to 'play' the 4-micrometer graphene drum with light. The researchers hope to succeed in moving the drum up and down at the same time. "We have not yet succeeded in this, but it may be possible in a future experiment," research leader Gary Steele told Tweakers.
If successful, the graphene drums can be used as quantum memory. In quantum computers, bits can be 0 and 1 at the same time, leading to unprecedented computing power. The 'quantum graphene drums' could be used in a quantum computer for temporary storage. The researchers will present their results in the journal Nature.
Researchers from the University of Groningen and the FOM Foundation have also found a way to manipulate the spin of electrons in graphene for a longer period of time. This worked with the help of electric fields, in contrast to magnetic fields, as previously only possible. The researchers used layers of insulating boron nitride to isolate a flake of graphene from the outside world.
The spin of electrons in graphene could be used to store information, but the problem is that it is only held for a short time. The researchers, who explained their results in Physical Review, were able to increase the so-called spin relaxation time to more than 2 nanoseconds. That is the time after which the electrons lose their 'value'. Until now, that time was 0.2 nanoseconds. In addition, it is easier to manipulate the electrons with electric than with magnetic fields.
Light particles have little power, but because graphene has an extremely low mass, the researchers at TU Delft were able to 'play' the 4-micrometer graphene drum with light. The researchers hope to succeed in moving the drum up and down at the same time. "We have not yet succeeded in this, but it may be possible in a future experiment," research leader Gary Steele told Tweakers.
If successful, the graphene drums can be used as quantum memory. In quantum computers, bits can be 0 and 1 at the same time, leading to unprecedented computing power. The 'quantum graphene drums' could be used in a quantum computer for temporary storage. The researchers will present their results in the journal Nature.
Researchers from the University of Groningen and the FOM Foundation have also found a way to manipulate the spin of electrons in graphene for a longer period of time. This worked with the help of electric fields, in contrast to magnetic fields, as previously only possible. The researchers used layers of insulating boron nitride to isolate a flake of graphene from the outside world.
The spin of electrons in graphene could be used to store information, but the problem is that it is only held for a short time. The researchers, who explained their results in Physical Review, were able to increase the so-called spin relaxation time to more than 2 nanoseconds. That is the time after which the electrons lose their 'value'. Until now, that time was 0.2 nanoseconds. In addition, it is easier to manipulate the electrons with electric than with magnetic fields.
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