Hannover 2016 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster: Quantum Optics and Photonics III
Q 42.34: Poster
Wednesday, March 2, 2016, 16:30–19:00, Empore Lichthof
Pulse-controlled quantum gate sequences on a strongly coupled qubit chain — •Holger Frydrych1, Michael Marthaler2, and Gernot Alber1 — 1Technische Universität Darmstadt, Germany — 2Karlsruher Institut für Technologie, Germany
We propose a selective dynamical decoupling scheme on a chain of permanently coupled qubits with XX type interactions, which is capable of dynamically suppressing any coupling in the chain by applying sequences of local pulses to the individual qubits. We demonstrate that high-fidelity single- and two-qubit gates can be achieved by this procedure and that sequences of gates can be implemented by this pulse control alone. We discuss the applicability and physical limitations of our model specifically for strongly coupled superconducting flux qubits. Since dynamically modifying the couplings between flux qubits is challenging, they are a natural candidate for our approach.