aspuru-list August 2014

aspuru-list@lists.fas.harvard.edu

18 participants
39 discussions

[Aspuru-Guzik group list] [qip] Special Seminar Wednesday - Renato Renner

by Shelby Kimmel

Hi Everyone, This week we have a special quantum information seminar given by Renato Renner. He will be speaking Wednesday April 2 at 4:30 (note time change from standard seminar!) in room 6C-442. Title and and abstract are below. Hope to see you there. Best, Shelby Title: Reliable Quantum State Tomography Abstract: Quantum state tomography is the task of estimating the state of a quantum system using measurements. Typically, one is interested in the (unknown) state generated during an experiment which can be repeated arbitrarily often in principle. However, the number of actual runs of the experiment, from which data is collected, is always finite (and often small). As pointed out recently, this may lead to unjustified (or even wrong) claims when employing standard statistical tools without care. In this talk, I will present a method for obtaining reliable estimates from finite tomographic data. Specifically, the method allows the derivation of confidence regions, i.e., subsets of the state space in which the unknown state is contained with probability almost one. This is joint work with Matthias Christandl, see also arXiv:1108.5329. -- Shelby Kimmel PhD Candidate in Physics Massachusetts Institute of Technology www.mit.edu/~skimmel _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 6 months

[Aspuru-Guzik group list] [qip] meeting?

by Edward Farhi

Hi Quanta I am away at a meeting in Montreal and I forgot about the usual meeting on Friday. How about if there is no official meeting as it is the last Friday of the summer and you all need a break. Of course you can self-organize if you want but I will see you all next Friday. Eddie Edward Farhi farhi(a)mit.edu _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 7 months

[Aspuru-Guzik group list] Prof. Van Voorhis visit on Sept. 9th

by Jennifer Wei

Hi everyone, Prof. Troy Van Voorhis of MIT will be visiting Harvard on the afternoon of Tuesday, Sept. 9th as part of the Theochem lecture series. I am setting up individual half hour meeting times with Prof. Van Voorhis at 2pm, 2:30pm, 3pm, and 3:30pm. If you would like to meet with him at one of these times, please let me know. Also, there will be a casual group discussion with Prof. Van Voorhis from 4-5pm at the couches in front of Alan's office. Please feel free to join us then; I'll email again when the date gets closer. Thanks, Jennifer

9 years, 8 months

[Aspuru-Guzik group list] Group Meeting Today is Cancelled

by Felipe Herrera Urbina

Dear group, Today there will be no group meeting. Next week David Tempel will tell us about his work. Best, Felipe

9 years, 8 months

[Aspuru-Guzik group list] Projects For Group NERSC Allocation

by Sam Blau

Hey group, NERSC is a supercomputing center in Berkeley, CA that our group has an allocation for. I am in the process of renewing our allocation for next year and would love to hear from group members that have projects they think could benefit from NERSC time and resources. Ideally these projects should be large enough to justify using NERSC over our own Odyssey2, which is quite a respectable cluster itself. Note that the renewal application is due by Sept 22nd, so if you are interested please contact me ASAP. We have time from last year's allocation to perform the necessary preliminary calculations, but getting them going always takes longer than you think it will. Looking forward to receiving proposals! Sam

9 years, 8 months

Re: [Aspuru-Guzik group list] Group moving.

by Aspuru Lab Email

From Alan. > On Aug 25, 2014, at 8:08 PM, Alan Aspuru-Guzik <alan(a)aspuru.com> wrote: > > Dear all, > > I already noticed some tensions about moving offices. We are all adults. Let's get this moving along. > > We will need help from everybody in this situation. Let´s set up some ground rules: > > a) Let's form a team of volunteers to help out others with all things moving. I propose that all graduate students and postdocs lend a hand to each other. For example, Siberia and the front office have some "common" things such as a printer, that other group members could help them with. We are a team. Otherwise, the members of that office should be responsible of helping move the materials such as printers in the given office. Please coordinate with each other. Who says I'm in? > > b) If you are traveling or away, ask your "buddies" (nicely!) for help. Eg. For example, Gian, who is away, could try to convince Salvatore with some expressos to help him move his stuff to the new office? Do not assume others will be helping you randomly. > > c) Use the #moving channel in slack.com to ask for help. Many of you have not joined slack.com and therefore these types of interactions still can't happen. It is great to avoid tons of email and many group members that have discovered that It is easy for me to look at it have already started using it. > > Thank you all! This is to benefit you all. There has been tons of work by many of us to make sure you have the best spaces possible. The least you can do is help us out in the move. > > Best, > Alan > > > Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology > Harvard University | 12 Oxford Street, Room M113 | Cambridge, MA 02138 > (617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru

9 years, 8 months

[Aspuru-Guzik group list] Special Group Seminar: Alex Briseno

by Sawaya, Nicolas

Hi friends, There is a special group seminar today at 3pm in the Division Room, from Professor Alex Briseno. Title and abstract below. Crystal Chemistry, Molecular Order and Charge Transport at Organic Semiconductor Interfaces Alejandro L. Briseno University of Massachusetts- Amherst, Polymer Science and Engineering Abstract The exploration and understanding of the crystallization, growth and the orientation of organic molecules on substrates is a very important feature in fundamental as well as applied research in the various fields of organic electronic device research. It is well known that the ordering and orientation of organic molecules significantly affects the electronic structure and transport properties, and the anisotropy of the transport properties in organic semiconductor thin films in particular has to be taken into account. It is, however, not only the orientation of the film as a whole that is important, but the molecular orientation in the few layers near an interface to other device layers that may affect the electronic properties, such as the electronic trap states, contact resistances or interface dipoles. In this lecture, I will discuss our efforts in investigating charge and photogenerated transport at organic nanocrystalline interfaces. For example, we have synthesized single-crystalline donor-acceptor nanowire devices (i.e. transistors, solar-cells) that have enabled us to demonstrate excitonic charge splitting and ambipolar charge transport at p-n nanointerfaces. The use of organic single-crystalline devices will have a major impact in accelerating the emerging area of organic electronics, as these highly ordered systems will enable one to extract intrinsic charge carrier transport phenomena that cannot be accurately determined from disordered systems common to amorphous and/or polycrystalline films used in mainstream devices. Figure. SEM image of vertically oriented crystals grown on graphene. The inset shows the theoretically predicted growth morphology of a single crystal.

9 years, 8 months

[Aspuru-Guzik group list] AAG and Admin Staff Office Closed - 8/28/14 (8-2)

by Marlon Cummings

Please note. *AAG and Admin Staff Office Closed - 8/28/14 (8:00 AM - 2:00PM)* ------------- Marlon G. Cummings Lab Manager, Aspuru-Guzik Group Mallinckrodt M112 Department of Chemistry and Chemical Biology Harvard University 12 Oxford Street Cambridge, MA 02138 617-496-9964 617-496-9411 (fax) http://aspuru.chem.harvard.edu/

9 years, 8 months

[Aspuru-Guzik group list] Fwd: Postdoc Positions

by Alan Aspuru-Guzik

---------- Forwarded message ---------- From: *Laura Gagliardi* <gagliard(a)umn.edu> Date: Monday, August 25, 2014 Subject: Postdoc Positions To: Laura Gagliardi <gagliard(a)umn.edu>, Donald G Truhlar <truhlar(a)umn.edu> Cc: David A Mazziotti <damazz(a)midway.uchicago.edu>, Rigoberto Hernandez < hernandez(a)gatech.edu>, Aaron Dinner <dinner(a)uchicago.edu>, Adrian Roitberg < roitberg(a)qtp.ufl.edu>, Alan Aspuru-Guzik <alan(a)aspuru.com>, "Angel E. Garcia" <angel(a)rpi.edu>, "Angela K. Wilson" <akwilson(a)unt.edu>, Annabella Selloni <aselloni(a)princeton.edu>, Anne McCoy <mccoy(a)chemistry.ohio-state.edu>, Arun Yethiraj <yethiraj(a)chem.wisc.edu>, Barbara Garrison <bjg(a)psu.edu>, Benjamin Schwartz <schwartz(a)chem.ucla.edu>, Bernhardt Trout <trout(a)mit.edu>, Bill Goddard <wag(a)wag.caltech.edu>, Bill Hase <Bill.Hase(a)ttu.edu>, Bill Miller <millerwh(a)berkeley.edu>, Bill Poirier <Bill.Poirier(a)ttu.edu>, Bill Reinhardt <rein(a)chem.washington.edu>, Branka Ladanyi < Branka.Ladanyi(a)gmail.com>, Brian Laird <LAIRD(a)chem.ukans.edu>, Casey Hynes < hynes(a)spot.colorado.edu>, Charles Brooks III <brookscl(a)umich.edu>, Christine Aikens <cmaikens(a)ksu.edu>, Christopher Jarzynski <cjarzyns(a)umd.edu>, Craig Martens <cmartens(a)uci.edu>, Daniel Crawford <crawdad(a)vt.edu>, Daniel Neuhauser <dxn(a)chem.ucla.edu>, Daniel Neumark <dneumark(a)berkeley.edu>, David Chandler <Chandler(a)cchem.berkeley.edu>, David Coker <coker(a)bu.edu>, David M Leitner <dml(a)unr.edu>, David Micha <micha(a)qtp.ufl.edu>, David Reichman <reichman(a)chem.columbia.edu> *SaneAttachments*: The attachments in this email have been copied to Dropbox by the magic of SaneBox <http://sanebox.com>. 1032ASAP.MC-PDFT.pdf <https://db.tt/YJhXYKo0> - Dropbox/SaneBox/Laura Gagliardi/Postdoc Positions, 2014-08-25 07.43.02 AM/ * Click the link above or find it in Dropbox with the path of the file provided next to the link. You can also forward this email as usual. Learn more <http://help.sanebox.com/customer/portal/articles/473528-sane-attachments>. * ------------------------------ Dear Colleagues, Don Truhlar and I are looking to fill two new postdoctoral positions to work on a project entitled ‘multiconfigurational pair-density functional theory’. As part of their research the two postdocs are expected to contribute to the development of the method, implement it in electronic structure packages, and use it to study chemical problems related to catalysis and spectroscopy. If you have students who are interested in working on this project, please encourage them to contact us. I attach a pdf of our first paper on this subject. Best wishes, Laura Gagliardi ------------------------------------------------------------------------ Laura Gagliardi University of MinnesotaDepartment of Chemistry207 Pleasant St. SEMinneapolis, MN 55455-0431 Phone: (612) 625-8299 FAX: (612) 626-7541 Email: gagliard(a)umn.edu <javascript:_e(%7B%7D,'cvml','gagliard(a)umn.edu');> Web: http://www.chem.umn.edu/groups/gagliardi ------------------------------------------------------------------------ -- Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology Harvard University | 12 Oxford Street, Room M113 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru

9 years, 8 months

[Aspuru-Guzik group list] [qip] fwd: Talk + seminar on Sum of Squares

by Aram Harrow

See below for an announcement about a talk and seminar series on the use of semidefinite programming hierarchies in theoretical computer science. This has overlap with quantum information via its connection to separability-testing and the monogamy of entanglement. aram -------- Original Message -------- Subject: [Theory-reading-group] Talk + seminar on Sum of Squares Date: Fri, 22 Aug 2014 11:11:36 -0400 From: Boaz Barak <b(a)boazbarak.org> To: theory-reading-group(a)lists.csail.mit.edu <theory-reading-group(a)lists.csail.mit.edu> Hi,Â For people on this list interested in Sum-of-Squares, Unique Games Conjecture, etc.. I will give a general-audience talk on the Sum of Squares method and its Theoretical Computer Science applications on Wednesday September 3rd 10-11:30am, as well as an 11-week seminar series on the topic on Mondays 2-5pm starting Sep 29th. (The talk and seminar series will be independent of one another, and neither one is required for following the other.) See titles and abstracts below, as well as the webpage Â http://www.boazbarak.org/sos for more information. ---- TALK TITLE: Sum of Squares Proofs and the Quest towards Optimal Algorithms TIME AND PLACE: Wednesday, Sep 3rd, 10:00am-11:30am, room 32-G449 Kiva ABSTRACT: I will survey recent results and questions regarding the Sum-of-Squares (SOS) method for solving polynomial equations. This method, which is related to classical mathematical questions revolving around Hilbert's 17th problem, has been studied in several scientific disciplines, including real algebraic geometry, proof complexity, control theory, and mathematical programming, and has found applications in fields as diverse as quantum information theory, formal verification, game theory and many others.Â We discuss some new perspectives on the SOS method, giving different interpretations and applications of it, and raising the question whether it could yield a generic *optimal* algorithm for broad domains of computational problems. We will also discuss the fascinating relation between the SOS method and Khot's Unique Games Conjecture, which is a tantalizing conjecture in computational complexity that has the potential to shed light on the complexity of a great many problems.Â The talk will be accessible for a general mathematically-mature audience, and assume no background on the SOS method or the unique games conjecture. It is partially based on joint works with Jonathan Kelner and David Steurer. If your interest is piqued by the talk, I will also give a 11 week seminar series on this topic on Mondays 2pm-5pm starting September 29th. ----- SEMINAR SERIES TITLE: Sum of squares upper bounds, lower bounds, and open problems. TIME AND PLACE: Mondays 2-5pm, starting Sep 29, 32-G575 WEBPAGE: http://www.boazbarak.org/sos This mini-course/seminar series will cover recent results and research directions on the "Sum of Squares" (SOS) algorithm, and its applications to theoretical computer science. The "Sum of Squares" algorithm was independently discovered by researchers from several communities, including Shor, Nesterov, Parrilo, and Lasserre, and is an algorithmic extension of classical math results revolving around Hilbert's 17th question. It was recently proposed as a route to resolving central theoretical CS questions Â such as the truth of Khot's "Unique Games Conjecture". In these lectures I will cover the SOS algorithm from a theoretical Computer Science perspective, with an emphasis onÂ very recent results (including some not yet published..) showing its power and limitations, as well as on the many open questions in this area. Despite describing state of the art research, this course should be accessible to first year graduate students or advanced undergraduate students, as it requires no background except for "mathematical maturity" and comfort with basic linear algebra and probability theory. I will assume students are familiar with concepts such as eigenvalues and eigenvectors, Â norms and Â basic inequalities such as Cauchy-Schwarz/Holder, Â and probabilistic notions such as expectation/variance, tail bounds such as Chernoff, and the probabilistic method.Â If you are interested in the course, please sign up for its mailing list, which can be found from the course webpage http://www.boazbarak.org/sos. _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 8 months

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aspuru-list August 2014