aspuru-list March 2013

aspuru-list@lists.fas.harvard.edu

35 participants
62 discussions

[Aspuru-Guzik group list] ITAMP topical lunch discussion: Thursday March 14th @ 12:00

by Charles Mathy

Dear Friends, On Thursday, March 14, there will be an ITAMP topical lunch discussion. Tea Room (P-226) @ CfA (60 Garden Street) Time: 12:00-1:30 As always pizza will be served. Speaker: Elie Wolfe (University of Connecticut) Title: Superradiance does not lead to Entangled States Abstract: Superradiance is a phenomenon by which a collection of excited atoms may decay coherently, briefly radiating much more intensely than would be expected by independent random decay. We ask if superradiance, modeled as a mixed state evolving over the highly entangled symmetric Dicke states, leads to nonzero entanglement. Surprisingly the answer is no. While we can quickly verify positivity under partial transpose we had to develop a new technique – based on explicit separable decomposition – to conclusively certify complete separability. Our method of decomposition serves furthermore as a necessary and sufficient entanglement test for any N-qudit mixed state diagonal in the symmetric basis. Looking forward to seeing you there, Charles Mathy

11 years, 1 month

[Aspuru-Guzik group list] Fwd: [ PSI-K ] MRS Communications - Theory and Simulation of Materials

by Alan Aspuru-Guzik

FYI -- Alan Aspuru-Guzik Associate Professor of Chemistry and Chemical Biology Harvard University http://aspuru.chem.harvard.edu Forwarded message: > From: PSI-K <psik-coord(a)dl.ac.uk> > To: PSI-K <psik-coord(a)dl.ac.uk> > Date: Sunday, March 10, 2013, 10:28:56 AM > Subject: [ PSI-K ] MRS Communications - Theory and Simulation of Materials > > An announcement has been added in the "PSI-K" site at PSI-K (http://cselnx9.dl.ac.uk:8080/portal) > > > Subject: MRS Communications - Theory and Simulation of Materials > > Category: Other > > From: Nicola Marzari > > Date: 10-Mar-2013 14:28 > > Message: > > > > Dear Psi-k members, > > I'm writing to suggest and solicit submissions to a new journal that has been created by the MRS (the Materials Research Society). > > It is called MRS Communications, and it is intended to be the high-profile journal of the society as, say, PRL is for the Americal Physical Society, or JACS is for the American Chemical Society. > > I have been asked to be the principal editor for the area of Theory and Simulation of Materials - I've accepted (against a distaste for the proliferation of journals) on the grounds that the materials modelling community is orphan, in my opinion, of a natural, high-profile forum where to submit papers that do not fall under the mandate of other societies (e.g. that of being of broad interest to their respective communities). > > In order to focus on quality, rather than urgence, I asked to change the focus of the journal to "Letters"-like papers as primary target (this change has just been accepted and implemented - hence this email). Reaching a prestige and impact that is a match to the prestige and impact of the materials' modelling community will take time, but I think that for all of us whose primary focus is materials, and in particular materials' modelling, this, as the high-profile journal of MRS, could be a very worthy possibility. > > The journal aims at an extremely fast turnaround time (14 days from acceptance to publication), and I am committed to an equally fast editorial process, with referees that are experts in materials modelling. > > I will be present at the DPG meeting in Regensburg, and at the Psi-k get-together, if anyone is interested in discussing a submission. In addition, I'd welcome proposals for a forthcoming topical issue on the topic of the "Materials Genome Initiative" and more broadly of computational materials design and discovery. > > All journal information can be found at http://www.mrs.org/mrc/. > > Many thanks for your attention, > > Nicola Marzari (EPFL) > > PS: as a procedural matter, I asked for approval to the Psi-k governing board before submitting this message. > > > ---------------------- > This automatic notification message was sent by PSI-K (http://cselnx9.dl.ac.uk:8080/portal) from the PSI-K site. > You can modify how you receive notifications at My Workspace > Preferences.

11 years, 1 month

[Aspuru-Guzik group list] Group calendar

by Martin Blood-Forsythe

Hello all, I forgot to announce at group meeting today that I am now in charge of the group google calendar, so if you have events that you want added you can send them to me and I'll make sure they get in. Best wishes, -Martin

11 years, 1 month

[Aspuru-Guzik group list] 3/13/2013 - Special HQOC Seminar - Prof. Luiz Davidovich

by Hamilton, Joan

Special Quantum Sciences Seminar Wednesday | Mar. 13 | 4:00 pm Jefferson 250 Luiz Davidovich Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil " Quantum Metrology: Towards the Ultimate Precision Limits in the Estimation of Parameters " Refreshments will be served The estimation of parameters plays a central role in science and technology. It is based on measurements made on probe systems undergoing a parameter-dependent process. Quantum metrology deals with the ultimate precision limits in estimation procedures, taking into account the constraints imposed by quantum mechanics. The parameters of interest could be for instance a phase displacement in an optical interferometer, the time durations of a physical process, a tiny force acting on a mesoscopic object, or the frequency of an atomic transition. The estimation error decreases with the number of resources employed in the measurement (number of probes, probe energy). Quantum mechanics imposes restrictions on the precision of the estimation, since two outgoing states corresponding to two different values of the parameter are not necessarily distinguishable, and furthermore measurements must conform to quantum constraints. On the other hand, quantum features, like entanglement and squeezing, help to increase the estimation accuracy beyond the standard limit, yielding better precision for the same amount of resources. However, the precision of recent experiments, while beginning to reach the limits imposed by quantum mechanics, is spoiled by the unavoidable influence of noise. Evaluating this effect is a difficult task. While exact results and analytical solutions are known for noiseless situations, the determination of the ultimate precision limit in the presence of noise is still a challenging problem in quantum mechanics. This talk will review some of the achievements and difficulties of quantum metrology, and will present a recently proposed method that allows the determination of precision limits for noisy systems. This method has been applied to obtain very good bounds for the precision in optical interferometry and atomic spectroscopy, as well as for the quantum speed of physical processes. Joan Hamilton Faculty Assistant to Profs. Greiner and Lukin HQOC Laboratory Administrator HUCTW Local Union Representative Harvard University Department of Physics 17 Oxford Street Cambridge, MA 02138 P: (617) 496-2544 F: (617) 496-2545

11 years, 1 month

[Aspuru-Guzik group list] Food in kitchen

by Sawaya, Nicolas

Free food (Felipe's) in kitchen!

11 years, 2 months

[Aspuru-Guzik group list] Final Call for Pictures - Deadline tonight - WINNER!

by Marlon Cummings

Congratulations!!!! --------------------------------- 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/

11 years, 2 months

[Aspuru-Guzik group list] Final Call for Pictures - Deadline tonight

by Marlon Cummings

Dear friends: Thanks for submitting your pictures to Taka! Although we have received some really fantastic photos, we still think better can be submitted. Please note, these will be uploaded to the new and improved CCB website -- its all about bragging rights! Attached, are a few sample shots that caught our attention. Come one people, lets do this! Deadline is midnight - or else, Taka will find you. Have a good night. Marlon. -------------------------- 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/

11 years, 2 months

[Aspuru-Guzik group list] [qip] Friday March 8

by Edward Farhi

Hi Quanta We will meet tomorrow at 11:00 in our usual spot. Uwe Wiese will tell us about what he has been up to! Eddie ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Edward Farhi Cecil and Ida Green Professor of Physics Director Center for Theoretical Physics Massachusetts Institute of Technology 6-300 Cambridge MA 02139 617 253 4871 ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

11 years, 2 months

[Aspuru-Guzik group list] [Aspuru-meetings-list] AMP SEMINAR, Monday March 11 at 11:00 am, Dr. Hyun-Kyung Chung, IAEA

by Gonzalo Gonzalez Abad

Dear colleagues, Please join us next Monday for a seminar sponsored by the Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics. Complete schedule at http://www.cfa.harvard.edu/amp/events.html *** *Please let me know if you want to meet with our speaker.* *** *11:00 AM Monday, March 11, 2013* *Phillips Auditorium* Center for Astrophysics 60 Garden St, Cambridge, MA *_Authors:_* *Dr. H.-K. Chung**& B. J. Braams *Atomic and Molecular Data Unit, Nuclear Data Section, Division of Physical and Chemical Sciences, IAEA, Vienna *_Title :_ IAEA Activities on Atomic, Molecular and Plasma-Surface Interaction Data for Fusion and other applications * *_Abstract_ *The research to create sustainable fusion reactions for energy generation is highly inter-disciplinary and requires extensive sets of data on atomic, molecular and plasma-surface interaction (AM/PSI) properties used for modeling the confined plasma and the evolution of the plasma-facing materials. Atomic and Molecular (A+M) Data Unit of the International Atomic Energy Agency (IAEA) has supported the International Atomic and Molecular Data Centre Network (DCN) where a number of institutions coordinate the production, exchange, compilation, dissemination and evaluation of fusion relevant data in order to meet the critical data needs of the world-wide fusion community. Data are needed for the main plasma species and a variety of impurity elements and molecules and their ions over a wide range of plasma conditions and for plasma interaction with different pure and mixed wall materials. In many cases the uncertainty in the collisional data is poorly known and many data sets have not been critically evaluated due to the technical difficulties and the lack of researchers to carry out data evaluation. However, the need is greatly increasing for evaluated data, and ultimately for a standard reference library for fusion relevant data. In this presentation, the A+M Data Unit activities and the current status of the IAEA coordinated activities on evaluation of collisional data to establish the IAEA standard library of fusion relevant atomic, molecular and plasma-material interaction data are summarized. Best regards, Gonzalo -- -- Gonzalo Gonzalez Abad Atomic and Molecular Physics Division Harvard-Smithsonian Center for Astrophysics 60 Garden Street, MS 50, Cambridge, MA 02138 Phone: 617-496-7938 Email: ggonzalezabad(a)cfa.harvard.edu _______________________________________________ Aspuru-meetings-list mailing list Aspuru-meetings-list(a)lists.fas.harvard.edu https://lists.fas.harvard.edu/mailman/listinfo/aspuru-meetings-list

11 years, 2 months

[Aspuru-Guzik group list] Practice talk

by Xavier Andrade

Dear all, As some of you probably know, I have being selected as a finalist for the Psi-k Volker Heine Young Investigator Award. This means that I have to make a presentation about my work for the jury during the DPG meeting. So I would like to ask you to help me to improve my talk by attending to a practice session and giving me comments and suggestions. I am planning to do it on Wednesday at 2:00 PM (I will let you know about the room). Thank you, Xavier

11 years, 2 months

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aspuru-list March 2013