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Old 9th April 2010, 05:11 PM
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Bonkers Bonkers is offline
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link to another article on the same topic

It seems to me what they're saying here is that the quantum drum in its natural state resonates at about 6 billion vibrations a second-

"The object is a mechanical resonator made of aluminium and aluminium nitride, measuring about 40 µm in length and consisting of around a trillion atoms. It is a thin disc, which resonates at about six billion vibrations per second."

By dropping the temperature to the calculated level - one tenth of a kelvin - the drum goes to ground state and is rendered 'inert', no vibrations. So, then they add a circuit for excitation
-
"Next, the team measured the quantum state of the resonator by connecting it electrically to a superconducting quantum bit or "qubit". The qubit acts, in fact, like a "quantum thermometer" that can identify just one quantum thermal excitation, or phonon. Once this has been done, the qubit can then be used to excite a single phonon in the resonator. This excitation can be transferred many times between the resonator and qubit."

which then allows the drum to be naturally inert (due to temperature) yet be vibrating at the same time (due to the Qubit resonance).




Thats how I read it anyway.


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