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Physics Department Colloquia

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Events During the Week of October 26th through November 2nd, 2014

Monday, October 27th, 2014

No events scheduled

Tuesday, October 28th, 2014

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Wednesday, October 29th, 2014

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Thursday, October 30th, 2014

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Friday, October 31st, 2014

The challenge of fault tolerant quantum computation
Time: 3:30 pm - 4:30 pm
Place: 2241 Chamberlin Hall (coffee at 4:30 pm)
Speaker: Lev Ioffe, Rutgers University
Abstract: The classical computation is made possible by error correction that allows to completely eliminate errors produced by solid state elements. In contrast to a discrete logical state of a classical computer, its quantum analogue is described the continuous wave function. Nevertheless, the ability to measure the quantum state in different basis allows error correction for quantum computation as well. Both classical and quantum error corrections can be implemented at a hardware level by a proper choice of the Hamiltonian. In this case, the quantum error correction is intimately related to the topological order parameter formed in the quantum systems described by these Hamiltonians.

I discuss simplest examples of the Hamiltonians that provide hardware error corrections by the formation of the topological order parameter and their implementation in the superconducting circuits. I also show that some of these Hamiltonians allow not only the error corrections but also discrete quantum operations, e.g. fault tolerant operations. I will show the experimental data that confirm theoretical predictions.
Host: McDermott
Poster: https://www.physics.wisc.edu/events/posters/2014/3501.pdf
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