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- Canadian Institute for Advanced ResearchCA270 papers
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15 papers · 2 filters
Practical experimental certification of computational quantum gates via twirling
Osama Moussa, Marcus P. da Silva, Colm A. Ryan +1
Due to the technical difficulty of building large quantum computers, it is important to be able to estimate how faithful a given implementation is to an ideal quantum computer. The…
Backaction of a driven nonlinear resonator on a superconducting qubit
Maxime Boissonneault, A. C. Doherty, F. R. Ong +4
We study the backaction of a driven nonlinear resonator on a multi-level superconducting qubit. Using unitary transformations on the multi-level Jaynes-Cummings Hamiltonian and qua…
Dual-probe decoherence microscopy: Probing pockets of coherence in a decohering environment
Jan Jeske, Jared H. Cole, Clemens Müller +2
We study the use of a pair of qubits as a decoherence probe of a non-trivial environment. This dual-probe configuration is modelled by three two-level-systems which are coupled in…
Two-qubit Gate of Combined Single Spin Rotation and Inter-dot Spin Exchange in a Double Quantum Dot
R. Brunner, Y. -S. Shin, T. Obata +6
A crucial requirement for quantum information processing is the realization of multiple-qubit quantum gates. Here, we demonstrate an electron spin based all-electrical two-qubit ga…
Implementation of a Toffoli Gate with Superconducting Circuits
Arkady Fedorov, Lars Steffen, Matthias Baur +2
The quantum Toffoli gate allows universal reversible classical computation. It is also an important primitive in many quantum circuits and quantum error correction schemes. Here we…
Surpassing the Standard Quantum Limit in an Atom Interferometer with Four-mode Entanglement Produced from Four-Wave Mixing
S. A. Haine, A. J. Ferris
We theoretically investigate a scheme for atom interferometry that surpasses the standard quantum limit. A four-wave mixing scheme similar to the recent experiment performed by Per…