November 2011 - ITP-quantumseminare

!! Cancelled theory colloquium
by QSIT Seminar 28 Nov '11

28 Nov '11

> From: Renato Renner <renner(a)phys.ethz.ch> > Date: November 28, 2011 8:21:36 GMT+01:00 > To: itp_institute(a)physik.unizh.ch, itp-all(a)phys.ethz.ch, itp-theorie-seminar(a)phys.ethz.ch > Subject: Cancelled theory colloquium > > Dear all > > Today's theory colloquium by Michal Horodecki is cancelled. > > (The reason is a cancellation of flights from Gdansk airport.) > > With best wishes > > Renato Renner > Prasenjit Saha > > > > Begin forwarded message: > > >> Dear Students and Colleagues, >> >> The ETH / UNI Theory Colloquium of Monday, November 28 (16.30 - 17.30), will be held by >> >> Michal Horodecki (University of Gdansk) >> >> Fundamental limitations for thermodynamics in microscopic regime >> >> The relationship between thermodynamics and statistical physics is valid in the thermodynamic limit -- when the number of particles involved becomes very large. Here we study thermodynamics in the opposite regime -- at both the nano scale, and when quantum effects become important. Applying results from quantum information theory we construct a theory of thermodynamics in these extreme limits. We derive a criteria for thermodynamical state transitions, and find two free energies: one which determines the amount of work which can be extracted from a small system in contact with a heat bath, and the other which quantifies the reverse process. They imply that generically, there are additional constraints which govern spontaneous thermodynamical processes. We find that there are fundamental limitations on work extraction from nonequilibrium states, due to both finite size effects which are present at the nano scale, as well as quantum coherences. This implies that thermodynamical transitions are generically irreversible at this scale, and we quantify the degree to which this is so. >> >> >> Host: Renato Renner >> >> Please join us at 16:30h in room Y16G05 on the Irchel Campus of UNI Zurich. We meet at 16:00h in front of the lecture hall for coffee and cookies. >> >> Best regards, >> >> Renato Renner >> Prasenjit Saha >> >> >> PS: The full program of the Theory Colloquium is available on http://www.itp.uzh.ch/seminars/theory.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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QSIT Lunch Seminar, Thursday Dec 1, 2011
by QSIT Seminar 28 Nov '11

28 Nov '11

Dear QSIT members The next QSIT Lunch Seminar will take place on Thursday Dec 1, 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. Carbon nanotubes in electric and magnetic fields Jelena Klinovaja, Condensed Matter Theory and Quantum Computing Group, University of Basel and Site-controlled QDs for nanophotonics Arun Mohan, Quantum Optoelectronics Group, ETH Zurich Abstracts: http://www.nccr-qsit.ethz.ch/news/lunchseminar/december2011 Please register for your free pizza at the following link by Tuesday November 29, 12:00 noon: http://www.doodle.com/6kngqbmb4franqws 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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Fwd: Theory Colloquium of November 28: Michal Horodecki
by QSIT Seminar 25 Nov '11

25 Nov '11

Begin forwarded message: > From: Renato Renner <renner(a)phys.ethz.ch> > Date: November 25, 2011 10:25:13 GMT+01:00 > To: itp_institute(a)physik.unizh.ch, itp-all(a)phys.ethz.ch, itp-theorie-seminar(a)phys.ethz.ch > Subject: Theory Colloquium of November 28: Michal Horodecki > > * * * * * Please note the unusual starting time: 16.30 * * * * * > > > Dear Students and Colleagues, > > The ETH / UNI Theory Colloquium of Monday, November 28 (16.30 - 17.30), will be held by > > Michal Horodecki (University of Gdansk) > > Fundamental limitations for thermodynamics in microscopic regime > > The relationship between thermodynamics and statistical physics is valid in the thermodynamic limit -- when the number of particles involved becomes very large. Here we study thermodynamics in the opposite regime -- at both the nano scale, and when quantum effects become important. Applying results from quantum information theory we construct a theory of thermodynamics in these extreme limits. We derive a criteria for thermodynamical state transitions, and find two free energies: one which determines the amount of work which can be extracted from a small system in contact with a heat bath, and the other which quantifies the reverse process. They imply that generically, there are additional constraints which govern spontaneous thermodynamical processes. We find that there are fundamental limitations on work extraction from nonequilibrium states, due to both finite size effects which are present at the nano scale, as well as quantum coherences. This implies that thermodynamical transitions are generically irreversible at this scale, and we quantify the degree to which this is so. > > > Host: Renato Renner > > Please join us at 16:30h in room Y16G05 on the Irchel Campus of UNI Zurich. We meet at 16:00h in front of the lecture hall for coffee and cookies. > > Best regards, > > Renato Renner > Prasenjit Saha > > > PS: The full program of the Theory Colloquium is available on http://www.itp.uzh.ch/seminars/theory.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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QSIT Seminar: Friday November 25,2011: Nigel Cooper
by QSIT Seminar 24 Nov '11

24 Nov '11

Dear all Please be informed about the following QSIT Seminar. With best regards, Sandra Künzel ------------------------------------------------------------------------------------------------------ Date: Friday November 25, 2011 Time: 11:00 Place: HPF G 6 Host: Tilman Esslinger Optical Flux Lattices for Ultracold Atomic Gases Nigel Cooper University of Cambridge, UK Abstract: http://www.nccr-qsit.ethz.ch/news/talks/abstractCooper2 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: Solid State Physics Seminar, 24. Nov. 14:30h
by QSIT Seminar 22 Nov '11

22 Nov '11

Dear all, Please be informed about the Solid State Physics Seminar: Date: 24. November 2011, 14:30h, in HPF G 6 Speaker: Andreas Dewes, Commissariat à l'Energie Atomique, Quantronics Group, F-Saclay Title: Running Grover's Algorithm on a 2-Qubit Quantum Processor. Abstract: We operate a superconducting quantum processor consisting of two tunable transmon qubits coupled by a swapping interaction, and equipped with non destructive single-shot readout of the two qubits [1]. With this processor, we run the Grover search algorithm among four objects and find that the correct answer is retrieved after a single run with a success probability between 0.52 and 0.67, significantly larger than the 0.25 achieved with a classical algorithm. This constitutes a proof-of-concept for the quantum speed-up of electrical quantum processors [2]. [1] arXiv:1109.6735v1 [2] arXiv: 1110.5170v1 Host: Andreas Wallraff You are cordially invited. Kind regards -- Gaby Strahm ETH Zürich Solid State Physics Laboratory Schafmattstr. 16, HPF F7 8093 Zürich Switzerland Phone: +41 44 633 23 35 Fax: +41 44 633 10 72 Be environment friendly, only print this email if absolutely necessary. ------------------------------------------------------------------------------------------------------ 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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Reminder: today QSIT Colloquium: S.M. Rezende
by QSIT Seminar 21 Nov '11

21 Nov '11

Dear all Please be informed about the following QSIT Colloquium on Monday With best regards, Ilona Blatter ------------------------------ Date: Monday November 21, 2011 Time: 11:00 Place: ETH Science City, HPV G 4 Host: Klaus Ensslin Spin current phenomena: new impetus to spintronics Sergio Machado Rezende Departamento de Física, Universidade Federal de Pernambuco, Recife, PE, Brazil Former Minister of Science of Brazil In recent years several phenomena have been discovered in magnetic nanostructures in which the transport of carriers depends on their spin. In addition to the long time known charge and heat currents, these phenomena also involve spin currents. Among them there are the spin Hall effect (SHE), the inverse spin Hall effect (ISHE) and the spin Seebeck effect (SSE). These effects make possible the conversion from one type of current to another in very efficient processes opening new possibilities for the development of spintronics. We will review recent developments in this area and present new results obtained with the spin Hall and spin Seebeck effects. ------------------------------------------ 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: S.M. Rezende; Mon Nov 21, 2011
by QSIT Seminar 18 Nov '11

18 Nov '11

Dear all Please be informed about the following QSIT Colloquium on Monday With best regards, Ilona Blatter ------------------------------ Date: Monday November 21, 2011 Time: 11:00 Place: ETH Science City, HPV G 4 Host: Klaus Ensslin Spin current phenomena: new impetus to spintronics Sergio Machado Rezende Departamento de Física, Universidade Federal de Pernambuco, Recife, PE, Brazil Former Minister of Science of Brazil In recent years several phenomena have been discovered in magnetic nanostructures in which the transport of carriers depends on their spin. In addition to the long time known charge and heat currents, these phenomena also involve spin currents. Among them there are the spin Hall effect (SHE), the inverse spin Hall effect (ISHE) and the spin Seebeck effect (SSE). These effects make possible the conversion from one type of current to another in very efficient processes opening new possibilities for the development of spintronics. We will review recent developments in this area and present new results obtained with the spin Hall and spin Seebeck effects. ------------------------------------------ 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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Seminar by Sergey Kubatkin, Mon Nov 14, 2011
by QSIT Seminar 11 Nov '11

11 Nov '11

Dear all Please be informed about the following seminar. With best regards, Ilona -------------------------------------------- Date : Mon Nov 14, 2011 Place: University of Basel, Klingelbergstr. 82, Lecture Hall 1 Time: 16:15 Host: Christian Schönenberger Epitaxial graphene on SiC for quantum metrology Sergey Kubatkin Chalmers University, Sweden -------------------------------------------- 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: Interaction-free Measurement
by Matthias Christandl 07 Nov '11

07 Nov '11

Anfang der weitergeleiteten E-Mail: > Von: Prasenjit Saha <psaha(a)physik.uzh.ch> > Datum: 7. November 2011 11:11:58 MEZ > An: renner(a)phys.ethz.ch, christandl(a)phys.ethz.ch > Betreff: Interaction-free Measurement > > Hi, > > On wednesday, I will give a 30 min presentation on interaction-free > measurement. This is formally a Probevorlesung for Habilitation at > UniZh, but everyone is welcome and I will try to make it interesting > for students. Please would you circulate to group members. > > Thanks! > Prasenjit > > ------------------------------------------------------------------------ > > Date: Wednesday 9. November > Time: 14.00 to 14.30 > Room: Irchel 36 J 33 > > Prasenjit Saha > > Title: Quantum Bomb Detection > > Interaction-free measurement is a quantum paradox: a bomb that > explodes if it is struck by a single photon can be detected optically > without letting it explode. The paradox was first raised in 1993 by > Elitzur and Vaidman, and subsequent work has both improved the > theoretical formulation and verified it experimentally. > This talk will explain what interaction-free measurement means, > suggest a classical analogue, and speculate about applications. > > ------------------------------------------------------------------------ > Matthias Christandl Institute for Theoretical Physics ETH Zurich http://www.itp.phys.ethz.ch/people/christandl/index

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Reminder: QSIT Lunch Seminar, Thursday Nov 3, 2011
by QSIT Seminar 01 Nov '11

01 Nov '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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