[Aspuru-Guzik group list] Fwd: Harvard Physics Colloquium: John Martinis, UCSB, on 04/06/15

Dear colleagues, Those of you interested in quantum computing will find the April 6th Monday Physics Colloquium to be of interest: John Martinis is the speaker. Best wishes, Martin ---------- Forwarded message ---------- Subject: Announcement for Harvard Physics Colloquium Speaker John Martinis, UCSB, on 04/06/15 Harvard Physics Colloquium Monday, April 06, 2015 4:15 p.m.-5:15 p.m. in Jefferson 250 Tea served in Jefferson 450 @ 3:30 p.m. *“Bit-flip Error Correction with Superconducting Xmon Qubits”* John Martinis *UCSB* For announcement poster please go to: http://www.physics.harvard.edu/events/colloquium.pdf One of the outstanding challenges of quantum computation has been the realization of scalable qubits with high fidelity for all necessary operations. Here I discuss the design of a linear chain of 9 superconducting Xmon qubits that allows initialization, single and two qubit gates, and fast repetitive and simultaneous measurement with fidelity in the 99%-99.9% range. This performance has allowed us to perform bit-flip error correction with 8 repetition cycles that leads to improved lifetime of the state. The use of error correction based on the surface code enables all errors, both data and measurement, to be corrected to 1st and 2nd order.