October 2011 - ITP-quantumseminare

Special Lecture for PhD and Master Students by Leo Kouwenhoven, Wednesday November 2, 2011
by QSIT Seminar 30 Oct '11

30 Oct '11

Dear all The NCCR QSIT organizes periodically a 'Special Lecture for Master and PhD Students'. This semester the lecture will be given by Leo Kouwenhoven. He is recognized to give outstanding and comprehensive talks. Furthermore he will give the Physics Colloquium later on the same day and the lecture will serve as background. With best regards, Ilona Blatter ------------- Date: Wednesday November 2, 2011 Time: 12:45 -14:30 Place: HPV G5 Quantum Physics in Nanowires and Nanotubes Leo Kouwenhoven, Delft University of Technology, The Netherlands Our nanowires (diameter ~50nm, length ~5micron) consist of semiconducting material such as InAs, InP or InSb. We choose these materials for their specific advantages with respect to optical properties (e.g. single photon sources), induced-superconductivity and strong spin-orbit interaction. We define small, nanoscale devices such as quantum dots and superconducting rings. The phenomena that we study are qubits and funny Josephson junctions. The funniest of all would be one with Majorana Fermions in the junction. Our carbon nanotubes are fabricated in a special way such they remain ultra-clean. The consequence of this cleanliness is that the mechanical vibration of a freely suspended nanotube can undergo about a million (!) oscillations before it is damped. Things to read: S. Nadj-Perge, S.M. Frolov, E.P.A.M. Bakkers and L.P. Kouwenhoven Spin-orbit qubit in a semiconductor nanowire, Nature 468, 1084-1087 (2010) --------------------------------------------------- ETH Zurich Dr. Ilona Blatter QSIT Coordinator Laboratory for Solid State Physics HPF E 17 Schafmattstrasse 16 8093 Zurich ilona.blatter(a)phys.ethz.ch www.qsit.ethz.ch www.nccr-qsit.ethz.ch Phone: +41 44 633 36 06 Home: +41 44 844 42 50 ------------------------------------------------------------------------------------------------------ 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 Home: +41 44 844 42 50

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Thursday Nov 3, 2011: QSIT Lunch Seminar
by QSIT Seminar 28 Oct '11

28 Oct '11

Dear QSIT members The next QSIT Lunch Seminar will take place on Thursday Nov 3, at 12:00 noon in the room HPF G6, 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. From Coulomb to Photon Blockade (and back) Sebastian Schmidt, Institute for Theoretical Physics, ETH Zurich and Observation of Resonant Photon Blockade at Microwave Frequencies Using Correlation Function Measurements Christian Lang, Quantum Device Lab, ETH Zurich Abstracts: http://www.nccr-qsit.ethz.ch/news/lunchseminar/november2011 Please register for your free pizza at the following link by Tuesday November 1, 12:00 noon: http://www.doodle.com/9q82v4ct2gs8kacr 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 Ilona Blatter Professor for Solid State Physics QSIT Coordinator ------------------------------------------------------------------------------------------------------ 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 Home: +41 44 844 42 50

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QSIT Seminar - Jens Siewert - Tuesday Nov 1, 2011
by QSIT Seminar 28 Oct '11

28 Oct '11

Dear all Please be informed about the following QSIT Seminar. With best regards, Ilona Blatter --------------------------------------------------- Date: Tuesday, November 1, 2011 Time: 11:00 Place: HPF G 6 Host: Andreas Wallraff Working with multipartite entanglement in real systems Jens Siewert Universidad del País Vasco, Bilbao, Spain In this talk I will present briefly two topics of ongoing research regarding the generation and detection of multipartite entanglement. In the first part, I will explain an idea how multipartite entanglement could be generated in a circuit-QED system with many qubits (N > 10) and, in particular, how this entanglement could be detected and investigated systematically. The second topic of my presentation focuses on a new method to quantify tripartite entanglement in three-qubit states. This method is suitable to compute the so-called three-tangle for mixed states and gives exact values for a large family of states with a certain symmetry, while for all other states it yields a nontrivial lower bound. ------------------------------------------------------------------------------------------------------ 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 Home: +41 44 844 42 50

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NCCR QSIT Newsletter with links
by QSIT Seminar 27 Oct '11

27 Oct '11

Dear all Unfortunately there were only very few functioning links in the newsletter I sent this morning. These were lost when converting from .doc to .pdf Please download the corrected version at http://www.nccr-qsit.ethz.ch/news/newsletter/october2011 With best regards, Ilona Blatter ------------------------------ 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 Home: +41 44 844 42 50

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NCCR QSIT Newsletter
by QSIT Seminar 27 Oct '11

27 Oct '11

Dear all Please find attached the new issue of the NCCR QSIT Newsletter. With best regards, Ilona Blatter ------------------------------------------------------------------------------------------------------ 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 Home: +41 44 844 42 50

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QSIT Colloquium: Michael Fleischauer, Thursday October 27
by QSIT Seminar 25 Oct '11

25 Oct '11

Dear all Please be informed about the following QSIT Colloquium. With best regards, Ilona Blatter ------------------------------------------------------------------------ Date: Thursday October 27, 2011 Time: 16:45, coffee and tea at 16:15 Place: ETH Science City, HPV G 4 Host: Atac Imamoglu Slow-light polaritons Michael Fleischhauer University of Kaiserslautern, Germany Slow-light polaritons are quasi-particles generated in the interaction of light with laser-driven atoms under conditions of electromagnetically induced transparency (EIT). Their dispersion can be controlled to a large extend, representing massive Schroedinger particles on the one hand or multi-component, i.e. spinor objects with a Dirac-like spectrum on the other. In the latter case characteristic length and energy scales can be widely tuned, making relativistic effects accessible in the lab. Making use of the tunability of the mass the delocalization transition of the random-mass Dirac model with off-diagonal disorder can be observed. Combining EIT with Rydberg atoms provides strong interactions between polaritons, giving rize to interesting many-body phenomena, such as "hard sphere" photons, crystallization or bosonic quantum Hall effects. I will argue that recent experiments on EIT in Rydberg gases have already given evidence for the formation of "hard sphere" photons. ------------------------------------------------------------------------ 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 Home: +41 44 844 42 50

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Jonathan Home: Seminar in Basel
by QSIT Seminar 24 Oct '11

24 Oct '11

Dear all Please be informed about the following seminar taking place in Basel. With best regards, Ilona Blatter ------------------------------------------------------------------------------------------------------ Mo 24 Oct, 16:15, Dept. of Physics, University of Basel Hörsaal 1 Prof. Jonathan Home, ETH Zürich "Quantum information science with mixed-species ion chains" ------------------------------------------------------------------------------------------------------ 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 Home: +41 44 844 42 50

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QSIT Seminar: Friday October 14,2011: David B. Hume
by QSIT Seminar 13 Oct '11

13 Oct '11

Dear all Please be informed about the following QSIT Seminar. With best regards, Sandra Künzel ------------------------------------------------------------------------------------------------------ Date: Friday October 14, 2011 Time: 15:00 Place: HPF G 6 Host: Jonathan Home From quantum logic spectroscopy to coherent state detection: Experiments with AI+ clockwork David B. Hume University of Heidelberg, Germany Abstract: http://www.nccr-qsit.ethz.ch/news/talks/copy_of_abstractBeispiel QSIT Seminar qsit-seminar(a)phys.ethz.ch ETH Zurich Sandra Künzel NCCR QSIT (Finances) HPF E 17 8093 Zurich www.nccr-qsit.ethz.ch

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Fwd: [Mise] Mittagsseminar, October 10, Amir Shpilka (Technion)
by Matthias Christandl 09 Oct '11

09 Oct '11

Anfang der weitergeleiteten E-Mail: > Von: Robin Moser <robin-mise(a)inf.ethz.ch> > Datum: 9. Oktober 2011 14:12:54 MESZ > An: mise(a)inf.ethz.ch > Betreff: [Mise] Mittagsseminar, October 10, Amir Shpilka (Technion) > > Dear mittagsseminarists, > > it is my pleasure to invite you to the following talk: > > (! note that this talk takes place on a Monday) > > ************************************************************************** > Monday, October 10 Time: 12:15 pm Location: CAB G51 > ************************************************************************** > Amir Shpilka (Technion): > Tight lower bounds for 2-query LCCs over finite fields > ************************************************************************** > > Abstract: > A Locally Correctable Code (LCC) is an error correcting code that has > a probabilistic self-correcting algorithm that, with high probability, > can correct any coordinate of the codeword by looking at only a few > other coordinates, even if a fraction \delta of the coordinates are > corrupted. In this talk we will show interesting connections between > LCCs and questions in additive combinatorics, combinatorial geometry > over finite fields and rank of design matrices. In particular, we will > prove tight lower bounds on the length of 2-query LCCs over finite > fields. This is a joint work with Arnab Bhattacharyya, Zeev Dvir and > Shubhangi Saraf. >

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Reminder: QSIT Lunch Seminar: Thursday Oct 6, 2011:
by QSIT Seminar 03 Oct '11

03 Oct '11

Dear QSIT members The next QSIT Lunch Seminar will take place on Thursday Oct 6. at 12:00 noon in the room HPF G6, 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. Ultrafast all-optical switching by single photons in quantum dot cavity QED Andreas Reinhard, Quantum Photonics Group, IQE, ETH Zurich and Nonlinear Optomechanics in the single-photon regime Andreas Nunnenkamp, Condensed Matter Theory Group, University of Basel Abstracts: http://www.nccr-qsit.ethz.ch/news/lunchseminar/october2011 Please register for your free pizza at the following link by Tuesday October 4, 12:00 noon: http://www.doodle.com/hfiwskdexsbiiyzq 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 Ilona Blatter Professor for Solid State Physics QSIT Coordinator ---------------------------------------------------- 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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