R. G. Herb Condensed Matter Seminars |
Events During the Week of April 10th through April 17th, 2016
Monday, April 11th, 2016
- No events scheduled
Tuesday, April 12th, 2016
- Out-of -time-order correlators in solid state physics
- Time: 10:00 am
- Place: 5280 Chamberlin Hall
- Speaker: Lara Faoro, CNRS
- Abstract: Out-of-time-order correlators, introduced recently in the context of quantum gravity describe the delocalization of information in quantum systems. <br>
In classical chaotic systems, these correlators are known to grow exponentially with the Lyupanov exponent. I discuss the behavior of these correlators in canonical examples of solid state quantum chaotic systems: disordered electrons with and without phonon interaction. In conclusion, I discuss possible measurements of these correlators in superconducting systems. - Host: Robert Mcdermott
Wednesday, April 13th, 2016
- No events scheduled
Thursday, April 14th, 2016
- Dynamically corrected entangling gates for spin qubits
- Time: 10:00 am
- Place: 5310 Chamberlin Hall
- Speaker: Jason Kestner, UMBC
- Abstract: Spin qubits have recently demonstrated high fidelity single-qubit rotations and relatively long coherence times in a variety of experiments. High fidelity two-qubit entangling operations are the next challenge on the path towards scalable universal quantum computation. In this talk, we present recent theoretical results for dynamical decoupling protocols that protect the generation of entanglement. For capacitive coupling, we show that access to a particular set of high-fidelity single-qubit gates is sufficient to eliminate a large portion of the coherent error coming from low-frequency hyperfine and charge noise during the basic two-qubit operation, bringing CNOT gate fidelity up to the level of single-qubit gate fidelities. We will also discuss how to produce the basic entangling operation and the necessary single-qubit operations, as well as extensions to other coupling types.
- Host: Coppersmith
Friday, April 15th, 2016
- No events scheduled