ITP-quantumseminare

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[QI] QI Seminar
by Dejan D. Dukaric 19 Mar '08

19 Mar '08

Dear All, You can find the updated seminar schedule in the attachment. Cheers, Dejan

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2nd QI-Movie Evening
by Galliard Viktor 17 Mar '08

17 Mar '08

Hi all! After the successful starting event a few weeks ago w'll have the successor tomorrow. After the movie we might move to Safari or somewhere else... We meet at 730PM at IFW E-Stock. You might bring you own food or we order Pizza before the movie (or shop up stuffed :-). If you want bring your favourite movies with you and we try to democratically elect a suitable movie. btw. see attached pics from the last event. btw2. rumors say that all members of Stefan will attend the event! See you tomorrow Viktor

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Talk next Tuesday
by Roger Colbeck 14 Mar '08

14 Mar '08

Hi all, Oscar is giving next Tuesday's talk, 5pm in the Pauli Room. The title is "Typical entanglement: from the abstract to the physical". Cheers, Roger

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Next tuesday (note unusual time of talk)
by Roger Colbeck 07 Mar '08

07 Mar '08

On Tuesday we have 2 short talks: Viktor will be finishing his talk from last week and Stefan Wolf will be talking on the title Self-Reference. The talks will be at 14:00 in Honggerberg. See you there, Roger

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tomorrow's talk
by Roger Colbeck 03 Mar '08

03 Mar '08

Hi all, Tomorrow's talk will be by Viktor at 5pm in the Pauli Room. See you there, Roger Title: Simulating Quantum Correlations with finite Communication (RT07) It is well known that measurements on quantum states may reveal some behaviour which cannot be produced classically. The last 15 years people have tried to quantify this 'non-local part' using several information theoretic primitives such as NL-boxes or classical bits used for communication. In 2003 Bacon and Toner could show that 1 classical bit of one-way communication suffices to simulate the EPR-pair setup for arbitrary 2-outcome measurements. In 2007, Regev and Toner could show that 2 classical bits of communication suffice to simulate quantum correlations on a (known) bi-partite state of dimension d x d with 2-outcome measurements. Surprisingly, only 2 bits of communication is needed (independent of the dimension d). Nevertheless, even though quantum correlations $\alpha \beta$ can be simulated, their protocol does not yield correct marginals. Not much is known beyond these cases. In this talk we will give a brief sketch of the techniques used by Regev and Toner.

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Research Day plus Movie and Jazz
by Roger Colbeck 21 Feb '08

21 Feb '08

Hi all, For next Tuesday's talk we have a visitor, Andre Methot. The talk will be at 5pm in the Pauli room (title and abstract below). Also, Viktor is arranging a post-talk Movie and Jazz evening (see his message below). Cheers, Roger Title: Entanglement simulations and channels. Abstract: We will study the different entanglement simulation models: their structure, their motivation and the links that brings them all together. We will then introduce a novel idea. Linking them to classical and quantum channels. -------- Original Message -------- Subject: Research Day After Hour - Movie and Jazz Date: Wed, 20 Feb 2008 20:17:08 +0100 From: Galliard Viktor <viktor.galliard(a)inf.ethz.ch> To: <itp-quantumseminare-bounces(a)phys.ethz.ch>, <qi(a)lists.inf.ethz.ch> Hi all. After 1 1/2 years (!!) Stefans QI group (hopefully) managed to fix a date and movie for the first (official) QI Movie Evening. This will take place after the Research Day @ Hoenggerberg next Tuesday. Some of us will continue socializing at a 'cosy' Jazz concert @ Helsinki. I look forward for some people to join. Cheers, Viktor

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[QI] QI Seminar
by Dejan D. Dukaric 18 Feb '08

18 Feb '08

Dear All, The next QI Seminar is on Tuesday afternoon, February 19 at 2 pm (IFW D42) by David Gablinger who will present his Master Thesis (note new time and room!) Title: "Irreversibility in an open qubit bath model" Cheers, Dejan

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Thursday's Talk: change of time
by Roger Colbeck 11 Feb '08

11 Feb '08

Mario's talk on state merging has been shifted to 10:30am this Thursday and will be in the Pauli Room. See you there, Roger

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Next week's research day NOTE the day
by Roger Colbeck 07 Feb '08

07 Feb '08

Next week's research day has provisionally been scheduled for Thursday. Please complain to me if this is a problem. If a significant number of people object we can change it. The talk has been scheduled at 11am on Thursday 14th February, abstract below. Cheers, Roger Single-shot quantum state merging I will introduce the task of quantum state merging and give a protocol for this task which has been shown to require at least a certain amount of entanglement. We have shown that the amount of entanglement consumed by this protocol is optimal.

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Seth Lloyd QI Live
by dahlsten＠phys.ethz.ch 04 Feb '08

04 Feb '08

Dear all, You can also watch a talk by Seth Lloyd at Imperial live over the web on Wednesday-see details below. You would go to www.imperial.ac.uk/quantuminformation on the day, but make sure you have realplayer installed first. Cheers, Oscar > Hi there > We have a seminar this week: > Seth Lloyd > > > Wednesday 6/2/2008 at 14.30. > > IMS seminar room. > > > Non-quantum gravity > > > The application of concepts of quantum information to the problem of measuring spacetime geometry suggests that the spacetime metric should not be quantized. Instead, what is quantum are the clocks and signals that determine the metric. This talk presents a non-quantum theory of gravity. In this theory, intervals of space and time are derived from the states of quantum fields: the metric itself is not quantized. In non-quantum gravity, gravitational fields inherit the quantum fluctuations of the underlying quantum fields, leading to a systematic treatment of the back-reaction problem. The theory makes concrete predictions: in particular, the non-quantum gravitational fields do not exhibit independent zero-point fluctuations, predicting a suppression of tensor modes of the cosmic microwave background. Although the talk deals with quantum gravity, it will be accessible to anyone with a background in quantum information, too. ________________________________ From: tqo-bounces(a)imperial.ac.uk [mailto:tqo-bounces@imperial.ac.uk] On Behalf Of Retzker, Alexander Sent: 01 February 2008 23:51 To: Hartmann, Michael J; sougato.bose(a)qubit.org; tqo; Ho, Andrew F C K; tmrhm2003(a)yahoo.co.jp; pivanov(a)phys.uni-sofia.bg; mamdouh_abbara(a)hotmail.com; Dawson, Christopher M; andrew.fisher(a)ucl.ac.uk; Evans, Tim S; Pregnell, Kenneth L; Parker, Kim H; d.m.appleby(a)qmul.ac.uk; scsp(a)physto.se; bayat(a)physics.sharif.ir; Serafini, Alessio; Etienne Brion; Knight, Peter L; Owari, Masaki; Navascues, Miguel; Knight, Peter L; lane.hughston(a)kcl.ac.uk; Brody, Dorje C; Buhmann, Stefan Y Subject: [tqo] Seminar Hi there We have a seminar this week: Seth Lloyd Wednesday 6/2/2008 at 14.30. IMS seminar room. Non-quantum gravity The application of concepts of quantum information to the problem of measuring spacetime geometry suggests that the spacetime metric should not be quantized. Instead, what is quantum are the clocks and signals that determine the metric. This talk presents a non-quantum theory of gravity. In this theory, intervals of space and time are derived from the states of quantum fields: the metric itself is not quantized. In non-quantum gravity, gravitational fields inherit the quantum fluctuations of the underlying quantum fields, leading to a systematic treatment of the back-reaction problem. The theory makes concrete predictions: in particular, the non-quantum gravitational fields do not exhibit independent zero-point fluctuations, predicting a suppression of tensor modes of the cosmic microwave background. Although the talk deals with quantum gravity, it will be accessible to anyone with a background in quantum information, too. Best, Alex. _______________________________________________ tqo mailing list tqo(a)imperial.ac.uk https://mailman.ic.ac.uk/mailman/listinfo/tqo

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