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This Week at Physics

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Events During the Week of August 23rd through August 30th, 2015

Monday, August 24th, 2015

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Tuesday, August 25th, 2015

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Wednesday, August 26th, 2015

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Thursday, August 27th, 2015

R. G. Herb Condensed Matter Seminar
The quantum dot hybrid qubit - prospects for two-qubit gates
Time: 10:00 am
Place: 5310 Chamberlin Hall
Speaker: Sebastian Mehl
Abstract: The quantum dot hybrid qubit is a three-electron double quantum dot, where its operation point makes it either a spin qubit or a charge qubit. The recent advances on high fidelity single-qubit control [1] require now inter-qubit entangling gates to make this system a useful architecture for quantum computation. I present two approaches for such two-qubit gates that use either the fast transfers of electrons between quantum dots [2] or weak inter-qubit couplings at an optimal operation point [3]. Both approaches require state of the art manipulation techniques, and they can be tuned to high fidelities in the right parameter regimes. I also point out alternative approaches to realize high-fidelity two-qubit gates for hybrid qubits.

[1] see, e.g., D. Kim et al., arXiv:1502.03156

[2] S. Mehl, Phys. Rev. B 91, 035430 (2015)

[3] S. Mehl, arXiv:1507.03425
Host: Coppersmith
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Friday, August 28th, 2015

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