June 2015 - ITP-quantumseminare - lists.phys.ethz.ch

QSIT Seminar - Michael Biercuk - Monday, June 15, 2015
by QSIT Seminar 11 Jun '15

11 Jun '15

Dear all Please be informed about the following QSIT Seminar. With best regards, Ilona Blatter ------------------------------------------------------------------------------------------------------ Date: Monday, June 15, 2015 Time: 11:00 Place: ETH Zurich, Hönggerberg, HPF G 6 Host: Jonathan Home Predicting the future of noisy qubits Michael J. Biercuk University of Sydney, Australia Abstract: http://www.nccr-qsit.ethz.ch/news/talks/seminars2015/abstract_Biercuk ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics , HPF E 17 Otto-Stern-Weg 1 CH 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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group meeting tomorrow, Wed 4pm E41.1
by Joe Renes 09 Jun '15

09 Jun '15

Hi all, we'll meet tomorrow afternoon (Wednesday), instead of our usual Tuesday. Mark Wilde will tell us about recovery maps and conditional mutual information for quantum systems; see http://arxiv.org/abs/1505.04661 for more details. 4pm in E41.1 Best, -joe

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group meeting Wed K51/52 4pm
by Joe Renes 02 Jun '15

02 Jun '15

Hi all, today's meeting has been postponed till tomorrow, to avoid overlapping with the Schrödinger lecture at 4:15. Cyril Stark is back in town, and will tell us about the computational complexity of quantum tomography. See the title and abstract below. Best, -joe --------- Title: Inference of low-dimensional quantum models is NP-hard Abstract: Learning a lowest-dimensional quantum model describing experimentally measured data is NP-hard. I will briefly sketch how you can prove this claim. We will see that NP-hardness follows from a reduction of 3-coloring to the problem of analyzing an experiment in the prepare-and-measure setting with missing data (i.e., not all inner products between the experimental states and the experimental measurement operators have been determined by the experimentalist). We conclude that there exists no efficient algorithm to learn optimal effective quantum models describing measured data (unless P = NP). The talk is self-contained and requires no familiarity with complexity theory.

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QSIT Seminar - Arun Paramekanti - Wednesday, June 3, 2015
by Ilona Blatter 01 Jun '15

01 Jun '15

Dear all Please be informed about the following QSIT Seminar. With best regards, Ilona Blatter ------------------------------------------------------------------------------------------------------ Date: Wednesday, June 3, 2015 Time: 11:00 Place: ETH Zurich, Hönggerberg, HIT E 41.1 Host: Sebastian Huber Unconventional magnetic exchange interactions - from cold atoms to spin-orbit coupled solids Arun Paramekanti University of Toronto, Canada Abstract: http://www.nccr-qsit.ethz.ch/news/talks/seminars2015/abstractParamekanti ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics , HPF E 17 Otto-Stern-Weg 1 CH 8093 Zurich

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QSIT Lunch Seminar - Andrea Mehlin & Florian Leupold - Thursday, June 4, 2015
by QSIT Seminar 01 Jun '15

01 Jun '15

Dear QSIT members The next QSIT Lunch Seminar will take place on Thursday, June 4, 2015, at 12:00 noon in the room HPF G 6, ETH Zurich, Hönggerberg. There will be two talks of 30 minutes duration jointly presented by two collaborators from different research groups. At 13:00 pm free lasagna is offered to the participants. Stabilized skyrmion phase detected in MnSi nanowires by dynamic cantilever magnetometry Andrea Mehlin Poggio Lab, University of Basel and Fast coherent state generation through bang-bang control of a trapped ion Florian Leupold Trapped Ion Quantum Information, ETH Zurich Abstracts at: http://www.nccr-qsit.ethz.ch/news/lunchseminar/june2015 Please register for your free lasagna at the following link by Tuesday, June 2, 12:00 noon: https://ethz.doodle.com/mwuphznzast6x36k If you have suggestions on topics or speakers, or would like to present recent results of your research, please send your information to Andreas Wallraff or Ilona Blatter. With best regards, Andreas Wallraff, Professor for Solid State Physics Ilona Blatter QSIT Office --------------------------------------------------- ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics , HPF E 17 Otto-Stern-Weg 1 CH 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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