The future of computing -- carbon nanotubes and superconductors to replace the si...(fibre but for microwaves. The superposit...)

Date:3/28/2008

fibre, but for microwaves. The superposition state of one qubit can be transferred into a microwave electrical vibration of the waveguide, like plucking a guitar string. This microwave photon of energy recording the first qubits state can then be controllably transferred to the other qubit crucially, without destroying these delicate quantum states.

Mooij was part of a group that first demonstrated in 2000 that such superconducting loops can be placed in quantum superposition states. He will describe the progress that he and others have made since then, both in making practical quantum devices and in using them to explore fundamental aspects of quantum mechanics, such as whether and how the quantum weirdness of superpositions can survive when the objects concerned get much larger than atoms.

Mooij says that one of the biggest challenges in making quantum computers this way is to progress from two to three qubits that communicate with each other. He says that the particular approach he and his colleagues have been developing has the advantage that, if this can be achieved, scaling up further wont be too difficult.

Mooij says, With our qubit, once we have three set up we can move on to twenty or fifty.

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Contact: Joe Winters joseph.winters@iop.org 44-794-632-1473 Institute of Physics Source:Eurekalert

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