March 2013 - ITP-quantumseminare

QSIT Lunch Seminar: Natalia Bruno and Michael Walter, Thursday April 4, 2013
by QSIT Seminar 28 Mar '13

28 Mar '13

Dear QSIT members The next QSIT Lunch Seminar will take place on Thursday April 4, 2013 at 12:00 noon in the room HPF G 6, ETH Hönggerberg, Zurich. There will be two talks of 30 minutes duration jointly presented by two collaborators from different research groups. At 13:00 pm free pizza is offered to the participants. Realization of a photonic micro-macro entangled state Natalia Bruno Group of Applied Physics, University of Geneva and Entanglement Polytopes: Multi-Particle Entanglement from Single-Particle Information Michael Walter Institute for Theoretical Physics, ETH Zurich Abstracts: http://www.nccr-qsit.ethz.ch/news/lunchseminar/april2013 Please register for your free pizza at the following link by Tuesday April 2, 12:00 noon https://ethz.doodle.com/iem9xt82uh88vw5r 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 and Happy Easter, Andreas Wallraff, Professor for Solid State Physics Ilona Blatter QSIT Coordinator ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 CH Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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!! QSIT Seminar postponed: Christian Ospelkaus, T U E S DA Y March 26, 2013
by QSIT Seminar 25 Mar '13

25 Mar '13

Dear all Please be aware that Christian Ospelkaus' talk has been postponed to tomorrow March 26. With best regards, Ilona Blatter ------------------------------------------------------------------------------------------------------ Date: TUESDAY MARCH 26, 2013 Place: ETH Science City, HPF G 6 Time: 14:00 Host: Jonathan Home Microwave quantum logic and a CPT test with single (anti-)protons Christian Ospelkaus Institut für Quantenoptik, Leibniz Universität Hannover abstract: http://www.nccr-qsit.ethz.ch/news/talks/seminars2013/abstractOspelkaus ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 CH Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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QSIT Seminar: Christian Ospelkaus, Monday March 25, 2013
by QSIT Seminar 21 Mar '13

21 Mar '13

Dear all Please be informed about the following QSIT Seminar. With best regards, Ilona Blatter ------------------------------------------------------------------------------------------------------ Date: Monday March 25, 2013 Place: ETH Science City, HPF G 6 Time: 14:00 Host: Jonathan Home Microwave quantum logic and a CPT test with single (anti-)protons Christian Ospelkaus Institut für Quantenoptik, Leibniz Universität Hannover abstract: http://www.nccr-qsit.ethz.ch/news/talks/seminars2013/abstractOspelkaus ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 CH Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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Lukas Novotny, Physics Colloquium, 20.3.2013
by QSIT Seminar 18 Mar '13

18 Mar '13

Dear all Please be informed about the next Physics Colloquium. With best regards, Ilona ------------------------------------------------------------------------------------------------------ Date: Wednesday March 20, 2013 Place: ETH Science City, HPV G 4 Time: 16:45 (Coffee and tea at 16:15) Host: Christian Degen Cooling and Amplification of a Vacuum-Trapped Nanoparticle Lukas Novotny Photonics Laboratory, ETH Zurich Further details at: http://www.colloquium.phys.ethz.ch ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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QSIT Seminar: Francesco Mauri, Monday March 18, 2013
by QSIT Seminar 15 Mar '13

15 Mar '13

Dear all Please be informed about the following QSIT Seminar. With best regards, Ilona ------------------------------------------------------------------------------------------------------ Date: Monday March 18, 2013 Place: ETH Science City, HPF E 6 Time: 11:00 Host: Klaus Ensslin How to make graphene superconducting Franceso Mauri Université de Paris, France abstract: http://www.nccr-qsit.ethz.ch/news/talks/seminars2013/abstractMauri ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 CH Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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Yuval Gefen, Physics Colloquium, 13.3.2013
by QSIT Seminar 12 Mar '13

12 Mar '13

Dear all Please be informed about tomorrow's Physics Colloquium. With best regards, Ilona ------------------------------------------------------------------------------------------------------ Date: Wednesday March 13, 2013 Place: ETH Science City, HPV G 4 Time: 16:45 Host: Klaus Ensslin Weak Measurements and Weak Values, a Peephole into Quantum Mechanics Yuval Gefen The Weizmann Institute of Science, Israel Further details at: http://www.colloquium.phys.ethz.ch ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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QSIT for you
by Ilona Blatter 11 Mar '13

11 Mar '13

Dear all Are you …... … interested to visit the lab of a partner group? Do you wish to learn more about an experiment/theory of your colleague? Why don't you take advantage of a mini-sabbatical? Learn more at http://www.nccr-qsit.ethz.ch/education/minisabbaticals ... looking for a special lecture to attend? Interested to learn about a QSIT topic? Here you find a selection of lectures that are of interest to students working on QSIT projects: http://www.nccr-qsit.ethz.ch/education/lectures … terminating your master/PhD thesis? Are you looking for a new position? There are job opportunities published at: http://www.nccr-qsit.ethz.ch/openpositions/noticeboard With best regards, Ilona ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06 --------------------------------------------------- ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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Fwd: Theoretical Physics Colloquium by Daniel Loss
by QSIT Seminar 07 Mar '13

07 Mar '13

> It is a pleasure to announce the upcoming theoretical physics colloquium: > > Daniel Loss, "Topological Bound and Edge States in Low Dimensions" > > Location: Uni Zurich, Irchel Campus, Lecture Hall Y16G05 > Date and Time: Monday, 11 March 2013, 16:45h (16:30h Coffee) > > I will present some recent results [1,2,3] on exotic quantum states in low-dimensional systems with topological phases. These states can emerge as bound states in one and two dimensions due to the presence of spin orbit interaction and/or external magnetic fields that induce topological gaps via backscattering. Examples are fractionally charged fermions of Jackiw-Rebbi type, Majorana fermions, or edge states in quantum Hall systems, both in the integer and fractional filling factor regime. I will discuss simple lattice models, such as chains, ladders, and strips and show that there are topological phases which permit fermions with non-Abelian braiding statistics--believed to be useful for topological quantum computing. These models can be implemented in optical lattices. > > [1] J. Klinovaja, P. Stano, and D. Loss, Phys. Rev. Lett. 109, 236801 (2012). > [2] J. Klinovaja and D. Loss, arXiv:1301.5822. > [3] J. Klinovaja and D. Loss, arXiv:1302.6132. > > Hope to see you, > > Prasenjit and Matthias. > > Matthias Christandl > Institute for Theoretical Physics > ETH Zurich > http://www.itp.phys.ethz.ch/people/christandl/index > > Prasenjit Saha > Institute for Theoretical Physics > University of Zurich > http://www.physik.uzh.ch/~psaha/ ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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Fwd: talk by Rob Spekkens: On causal explanations of quantum correlations
by QSIT Seminar 06 Mar '13

06 Mar '13

> Dear all, > > Please note the following talk by > > Rob Spekkens (Perimeter Institute for Theoretical Physics) > > which is aimed at physicists, philosophers and computer scientists. > > Date and Time: Tuesday, 12th March 2013, 16:15 > Location: ETH Zentrum, ML H 41.1 > http://www.mapsearch.ethz.ch/map/mapSearchPre.do?gebaeudeMap=ML&farbcode=c0… > > Title: On causal explanations of quantum correlations > > Abstract: > If correlation does not imply causation, then what does? The beginning of a rigorous answer to this question has been provided by philosophers and by researchers in the field of machine learning in the form of causal discovery algorithms. These take as their input facts about correlations among a set of observed variables, and they return as their output a causal structure relating these variables. We apply these algorithms to correlations arising from entangled quantum systems, specifically those that violate a Bell inequality, and we show that any causal explanation of these must contradict a core principle of the algorithms, namely, that an observed statistical independence between variables should not be explained by fine-tuning of the causal parameters. In particular, we demonstrate the need for such fine-tuning for most of the causal mechanisms that have been proposed to underlie such correlations, including superluminal causal influences, superdeterminism (that is, a denial of freedom of choice of settings), and retrocausal influences which do not introduce causal cycles. This work suggests a novel perspective on the assumptions underlying Bell's theorem. While the theorem is usually characterized as deriving a contradiction from locality and realism, we show that the (nebulous) assumption of realism can be replaced with the principle that all correlations ought to be explained causally, and Bell's notion of locality can be replaced with the assumption of no fine-tuning. Finally, we discuss the possibility of avoiding the contradiction by replacing conditional probabilities with a noncommutative generalization thereof. Based on arXiv:1208.4119. Joint work with Chris Wood. > > > Looking forward to seeing you, Matthias Christandl and Norman Sieroka > > Matthias Christandl > Institute for Theoretical Physics > ETH Zurich > http://www.itp.phys.ethz.ch/people/christandl/index > > Norman Sieroka > Chair for Philosophy > ETH Zurich > http://www.phil.ethz.ch/en/personen/norman-sieroka.html ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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Fwd: Zurich Physics Colloquium , March 6th, 2013
by QSIT Seminar 05 Mar '13

05 Mar '13

> Von: Sandra Baumann <baumanns(a)itp.phys.ethz.ch> > Betreff: Zurich Physics Colloquium , March 6th, 2013 > Datum: 5. März 2013 14:55:54 MEZ > An: zurich-physics-colloquium(a)phys.ethz.ch > > Dear students, dear colleagues > > Please join us for tomorrow's colloquium by > > Masahito Ueda > Department of Physics, University of Tokyo, Japan > > who will talk about > > Symmetry Breaking and Topological Excitations > in Bose-Einstein Condensates > > Please visit our web page http://www.colloquium.phys.ethz.ch for details. > > > Best regards > > Tilman Esslinger > Thomas Gehrmann > Juerg Osterwalder > Renato Renner > Use https://webmail.phys.ethz.ch/mailman/listinfo/physik-kolloquium for subscription/unsubscription > Consult the archive at https://webmail.phys.ethz.ch/pipermail/zurich-physics-colloquium/ ------------------------------------------------------------------------------------------------------ ETH Zurich Dr. Ilona Blatter NCCR QSIT Coordinator Laboratory for Solid State Physics HPF E 17 Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06

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