March 2015 - ITP-quantumseminare

today's group meeting 16:30 K51
by Joe Renes 09 Mar '15

09 Mar '15

Hi all, today's meeting is in K51, starting at 16:30. I'll talk a bit about some recent work on converses to quantum channel codes. -joe

1 0

QSIT Seminar: Wed March 11, 2015 - Kostya Novoselov
by QSIT Seminar 09 Mar '15

09 Mar '15

Dear all Please be informed about the following QSIT Seminar. With best regards, Sandra Künzel ------------------------------------------------------------------------------------------------------ Date: Wednesday March 11, 2015 Time: 11:00 Place: ETH Zurich, Hönggerberg, HPF G 6 Hosts: Klaus Ensslin Controlling crystallographic orientation and the resonant tunnelling in van der Waals heterostructures Kostya Novoselov School of Physics & Astronomy, University of Manchester, UK 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

1 0

QC2/QSIT Seminar in Basel: March 9, 2015 - Arnaud Gloppe
by QSIT Seminar 06 Mar '15

06 Mar '15

Dear all Please be informed about the following QC2/QSIT Seminar in Basel. With best regards, Ilona Blatter ------------------------------------------------------------------------------------------------------ Date: Monday, March 9, 2015 Time: 16:15 Place: Universität Basel, Klingelbergstr. 82, Hörsaal 1 Host: Patrick Maletinsky Nano-optomechanics in a focused laser beam: cartography of the optical force field and bidimensional backaction Arnaud Gloppe Institut Néel, Grenoble, France Link: https://physik.unibas.ch/dept/pages/de/events/cms.htm 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

1 0

Solid State Physics Seminar: Mon March 9, 2015 - Jelmer Renema
by QSIT Seminar 05 Mar '15

05 Mar '15

Dear all Please be informed about the following Solid State Physics Seminar. With best regards, Sandra Künzel > > Date: Monday, 9. March 2015, 11:00h, HPF G 6 seminar room > > Speaker: Dr. Jelmer Renema, Huygens-Kamerlingh Onnes Lab, University of Leiden, NL > > Title: "The physics of nanowire superconducting single photon detectors" > > Abstract: > Nanowire superconducting single photon detectors (SSPDs) are of great technological importance for many applications such as quantum cryptography, interplanetary communication and cancer research. They have low dark counts, high detection efficiency (>90%) and operate in the near-infrared. Yet, their working mechanism is poorly understood. > > In this talk, I will give an overview of our work on this problem. I will demonstrate that the working mechanism of such detectors relies on a combination of quasiparticle diffusion and vortex entry. This result enables us to explain several properties of these devices, in particular the temperature dependence of the detector response, which was a long-standing open problem in this field. > > Moreover, I will demonstrate that the efficiency of the detector depends on where along the cross-section of the wire the photon is absorbed. This position-dependent internal detection efficiency has a typical length scale of some tens of nm. This property is crucial for near-field applications of these devices. > > These results, combined with a numerical model developed at the university of Zurich, place the field of SSPD physics on a quantitative basis. They therefore open the way to ab-initio design of these detectors. > > Host: Andreas Wallraff 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

1 0

group meeting Tuesday 12:00 K52
by Joe Renes 02 Mar '15

02 Mar '15

Hi all, we'll meet in K52 for the group meeting tomorrow at noon. -joe

1 0

QSIT Lunch Seminar: Thursday, March 5, 2015
by QSIT Seminar 02 Mar '15

02 Mar '15

Dear QSIT members The next QSIT Lunch Seminar will take place on Thursday, March 5, 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. Heralded Phonon Entanglement on a Photonic Crystal Architecture Hugo Flayac Institute of Theoretical Physics, EPF Lausanne and A topological insulator on demand Sina Zeytinoglu ITP and IQE, ETH Zurich Abstracts at: http://www.nccr-qsit.ethz.ch/news/lunchseminar/march2015 Please register for your free lasagna at the following link by Tuesday, March 3, 12:00 noon: https://ethz.doodle.com/iwswn7qae63zn2az 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

1 2

this week's meeting
by Joe Renes 01 Mar '15

01 Mar '15

Hi all, this week's meeting will take place on Tuesday at noon, in order to avoid conflicts with the theory colloquium (Monday 16:45 in HIT). The room is not set yet, but I'll let you know when something is scheduled. This week's talk will be by Winton Brown, visiting from UCL. Best, -joe

1 0