Solid State Physics Seminar

Please be informed about following talk:

Date: Friday, 13. December 2013, 10:00h

Location: HPL (new building) D 32

Speaker: Matthias Steffen, IBM T. J. Watson Research Center, USA

Title: Quantum Computing Using Superconducting Qubits Abstract: We will review IBM’s current approach towards building a quantum computer using superconducting qubits. Large systems will require quantum error correction techniques and recently it has been show that such techniques based on two-dimensional surface codes have a remarkably low fault tolerant threshold. Surface codes have guided our vision for several years and form the core of our approach. We will show experimental progress towards implementing surface codes, including a description of our qubits whose coherence times (T1, T2) are near 50 micro-seconds. Together with 100ns-400ns long all-microwave two-qubit gates, we show two-qubit gate fidelities near or even above 95%. Because our approach does not require explicit frequency tuning of the qubits, calibration routines are straight forward. We will conclude by outlining some future challenges that face the community on our quest towards larger systems, as well as pointing out fruitful areas of quantum engineering which have influenced other branches of physics. Host: Andreas Wallraff

You are cordially invited!

Kind regards

Gaby Strahm ETH Zürich Solid State Physics Laboratory Otto-Stern-Weg 1, HPF F7 8093 Zürich Switzerland

Phone: +41 44 633 23 35 Fax: +41 44 633 10 72

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------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 CH Schafmattstrasse 16 8093 Zurich

ilona.blatter@phys.ethz.ch www.nccr-qsit.ethz.ch

Phone: +41 44 633 36 06