May 2014 - ITP-quantumseminare - lists.phys.ethz.ch

Re: special talk tomorrow 4pm, location TBA --> E41.1
by Joe Renes 16 May '14

16 May '14

Hi all, we'll meet in E41.1 at 4pm for the talk. See you then! -joe On Thu, May 15, 2014 at 4:51 PM, Joe Renes <joerenes(a)gmail.com> wrote: > Hi all, > > tomorrow Zheshen Zhang from MIT will visit the group and give a > presentation at 4pm. As yet, I am unsure of the location, but will keep you > posted. > > The title and abstract are as follows: > > “Secure Communication via Quantum Illumination” > > Entanglement is essential to many quantum information applications, but it > is easily destroyed. Quantum illumination, however, thrives on > entanglement-breaking loss and noise. First proposed for enhancing the > signal-to-noise ratio for detecting a weakly-reflecting target in the > presence of strong background noise, quantum illumination was later shown, > theoretically, to enable high data-rate classical communication that is > immune to passive eavesdropping. In both applications Alice generates a > pair of entangled light beams (signal and idler), retaining the idler and > transmitting the signal. By making a joint measurement on the retained and > returned light, where the latter is either background noise plus target > reflection (for target detection) or Bob's modulated and amplified version > of the signal he received from Alice (for secure communication), quantum > illumination achieves a substantial benefit from its initial entanglement, > despite the roundtrip lossy, noisy propagation channel's having left the > retained and returned light in a separable state. We report the first > experimental demonstration of quantum illumination's passive-eavesdropping > immunity. > > Best, > > -joe >

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QSIT/LFKP Seminar - Adrian Bachtold - Tuesday May 20, 2014
by QSIT Seminar 16 May '14

16 May '14

Dear all Please be informed about the following QSIT/LFKP Seminar. With best regards, Ilona Blatter ------------------------------------------------------------------------------------------------------ Date: Tuesday May 20, 2014 Time: 16:45 Place: ETH Zurich, Hönggerberg, HPF G 6 Host: Christian Degen Mechanical resonators based on nanotubes and graphene Adrian Bachtold ICFO – The Institute of Photonic Sciences, Castelldefels, Spain Abstract: http://www.nccr-qsit.ethz.ch/news/talks/seminars2014/abstract_Bachtold ------------------------------------------------------------------------------------------------------ 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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special talk tomorrow 4pm, location TBA
by Joe Renes 15 May '14

15 May '14

Hi all, tomorrow Zheshen Zhang from MIT will visit the group and give a presentation at 4pm. As yet, I am unsure of the location, but will keep you posted. The title and abstract are as follows: “Secure Communication via Quantum Illumination” Entanglement is essential to many quantum information applications, but it is easily destroyed. Quantum illumination, however, thrives on entanglement-breaking loss and noise. First proposed for enhancing the signal-to-noise ratio for detecting a weakly-reflecting target in the presence of strong background noise, quantum illumination was later shown, theoretically, to enable high data-rate classical communication that is immune to passive eavesdropping. In both applications Alice generates a pair of entangled light beams (signal and idler), retaining the idler and transmitting the signal. By making a joint measurement on the retained and returned light, where the latter is either background noise plus target reflection (for target detection) or Bob's modulated and amplified version of the signal he received from Alice (for secure communication), quantum illumination achieves a substantial benefit from its initial entanglement, despite the roundtrip lossy, noisy propagation channel's having left the retained and returned light in a separable state. We report the first experimental demonstration of quantum illumination's passive-eavesdropping immunity. Best, -joe

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Postdoc in Quantum Information Theory at the University of Copenhagen
by Matthias Christandl 15 May '14

15 May '14

Dear Colleagues, I would be grateful, if you could distribute this announcement of a postdoctoral position in quantum information theory at the University of Copenhagen to potential candidates: Go to the page http://www.ku.dk/english/available_positions/vip/ and press on "Postdoctoral Position in Quantum Information Theory“ Please note that the deadline is very soon (31th of May 2014). Best wishes, Matthias. Matthias Christandl Professor Department of Mathematical Sciences University of Copenhagen New email: christandl(a)math.ku.dk

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QSIT Seminar: Monday May 19, 2014 - Katja Nowack
by QSIT Seminar 15 May '14

15 May '14

Dear all Please be informed about the following QSIT Seminar. With best regards, Sandra Künzel ------------------------------------------------------------------------------------------------------ Date: Monday May 19, 2014 Time: 11:00 Place: ETH Zurich, Hönggerberg, HPF G 6 Host: Klaus Ensslin Imaging current in quantum spin Hall insulators Katja Nowack Stanford University, CA, USA Link: http://www.nccr-qsit.ethz.ch/news/talks 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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tomorrow's group meeting: 15:30 in E41.1
by Joe Renes 10 May '14

10 May '14

Hi all, tomorrow's meeting will be a little earlier, so that we may also make it to the theory colloquium at Irchel. Gilles Puetz will give a talk and we'll postpone arXiv discussions till the following week. Here's the title and abstract: Title: The measurement dependent local polytope: How quantum nonlocality beats arbitrary lack of free choice Abstract: An implicit assumption in the derivation of Bell inequalities, and hence the demonstration of quantum nonlocality, is that the measurement settings can be chosen freely. Here we show that this assumption can be relaxed almost completely, i.e. we show that quantum mechanics is nonlocal even with arbitrarily small freedom of choice. To this end, we prove that this type of correlations forms a polytope which we call the measurement dependent local (MDL) polytope. This gives rise to Bell-like inequalities whose violations are incompatible with the assumption of measurement dependent locality, i.e. Bell locality with limited free choice. Apart from fundamental interest, the MDL-polytope and its inequalities are prime candidates to be used in useful applications like randomness extraction or QKD. Best, -joe

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Seminar in Basel - Jaroslav Fabian - Monday May 12, 2014
by QSIT Seminar 09 May '14

09 May '14

Dear all Please be informed about the following seminar in Basel. With best regards, Ilona Blatter ----------------------------------------------------------------------------------------------------- Date: Monday May 12, 2014 Place: University of Basel, St. Johanns-Ring 25, Lecture Hall 1 Time: 16:15 Host: Christian Schönenberger Spin-orbit coupling and spin relaxation in graphene Jaroslav Fabian Universität Regensburg, Germany Details at: http://www.physik.unibas.ch/dept/pages/de/events/cms.htm --------------------------------------------------- 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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3 QSIT Seminars - Hendrik Bluhm / Evgeny Checkovich / Ronald Hanson - Friday May 9, 2014
by QSIT Seminar 07 May '14

07 May '14

Dear all Please be informed about the following 3 seminars on Friday May 9 at different institutions. With best regards, Ilona Blatter ----------------------------------------------------------------------------------------------------- Date: Friday May 9, 2014 Place: University of Basel, St. Johanns-Ring 25, Lecture Hall 2, 1st floor Time: 11:00 Host: Dominik Zumbühl Single shot correlation spectroscopy and high fidelity gates for two electron spin qubits Hendrik Bluhm RWHT Aachen, Germany ------------------------------------------------------------------------------------------------------ Date: Friday May 9, 2014 Place: ETH Zurich, Hönggerberg, HPF G 6 Time: 14:00 Host: Atac Imamoglu Nuclear magnetic resonance (NMR) in self-assembled quantum dots: structural analysis and quantum computing applications Evgeny Checkovich Department of Physics and Astronomy, University of Sheffield, U.K. Abstract: http://www.nccr-qsit.ethz.ch/news/talks/seminars2014/abstract_Chekhovich ------------------------------------------------------------------------------------------------------ Date: Friday May 9, 2014 Place: University of Basel, St. Johanns-Ring 25, Lecture Hall 1 Time: 15:15, coffee at 15:00 Host: Patrick Maletinsky Quantum measurements with diamond spins: from fundamental studies to remote teleportation Ronald Hanson Delft University of Technology, Netherlands Details at: http://www.physik.unibas.ch/dept/pages/de/events/colloquium.htm ------------------------------------------------------------------------------------------------------ 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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Newsletter April 2014
by Ilona Blatter 06 May '14

06 May '14

Dear QSIT enthusiasts Please find below the link to our latest Newsletter of the NCCR QSIT http://www.nccr-qsit.ethz.ch/news/newsletter/april2014 covering the topics: - Scientific News - Technology Transfer - Knowledge Transfer - Promotions and Awards - Recent Events - Mini-sabbaticals - For your agenda - New Collaborators With best regards, Ilona Blatter --------------------------------------------------- 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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QSIT Seminar - Erik Sjöqvist - Thursday May 8, 2014
by QSIT Seminar 06 May '14

06 May '14

Dear all Please be informed about the following QSIT Seminar. With best regards, Ilona Blatter ------------------------------------------------------------------------------------------------------ Date: Thursday May 8, 2014 Time: 15:00 Place: ETH Zurich, Hönggerberg, HPF G 6 Hosts: Stefan Filipp/Andreas Wallraff Non-adiabatic holonomic quantum computation Erik Sjöqvist Department of Quantum Chemistry, Uppsala University, Sweden Abstract: http://www.nccr-qsit.ethz.ch/news/talks/seminars2014/abstract_Sjoqvist --------------------------------------------------- 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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