aspuru-list November 2011

aspuru-list@lists.fas.harvard.edu

25 participants
58 discussions

[Aspuru-Guzik group list] [IACS-events] Mark your calendar: IACS ComputeFest in January

by Rosalind Reid

Friends, I'm writing to let you know of several coming events and dates of interest: **COMPUTEFEST 2012: For a second year, IACS and partner organizations will offer skill- and knowledge-building activities for graduate and undergraduate students and the Harvard community during January. For your planning purposes, we've posted a tentative schedule online: More Info: http://iacs.seas.harvard.edu/events/computefest-2012 Registration and further details will be available in early December. **1ST IACS COMPUTATIONAL CHALLENGE: Also in January, IACS will sponsor the Computational Challenge, a two-week activity for graduate students who will compete in teams to solve a real-world humanitarian problem with computation. More info: http://iacs.seas.harvard.edu/student-activities/iacs-challenge-2012 **DOE CGSF FELLOWSHIP DEADLINE: The Krell Institute is accepting applications for the DoE Computational Science Graduate Fellowships through Jan. 10. More info: http://www.krellinst.org/csgf/ **INNOVATIVE PARALLEL COMPUTING 2012: Abstracts for this conference are due Dec. 6. More info: http://www.innovativeparallel.org. See you at this Friday's IACS Seminar, Rosalind Reid Executive Director, IACS http://iacs.seas.harvard.edu _______________________________________________ Iacs-events mailing list Iacs-events(a)seas.harvard.edu https://lists.seas.harvard.edu/mailman/listinfo/iacs-events

12 years, 5 months

[Aspuru-Guzik group list] ANNOUNCEMENT: Excitonics Seminar Series, TODAY, 3 pm/Grier A 34-401

by Cathy Bourgeois

Please post and forward to your group ALSO NOTE: this talk is in EECS Grier conf. room: 34-401A instead of the usual RLE Conf room ---------------------------------------------------------------------------- -------------------------------- Center for Excitonics Seminar Series Announcement TUES, Nov 15, 2011 3:00 PM EECS Grier A Conference Room: 34-401A "Superfluid Phase Transition of Long-Lifetime Polaritons" David Snoke Department of Physics and Astronomy, University of Pittsburgh Abstract Polaritons are quasiparticles of electronic excitation in semiconductor structures with extremely light mass, about four orders of magnitude less than a free electron. Because of this very light mass, polaritons show Bose quantum effects even at moderate densities and temperatures from tens of Kelvin up to room temperature. In the past five years, multiple experiments have shown effects of polaritons analogous to Bose condensation of cold atoms, such as a bimodal momentum distribution, quantized vortices, Bogoliubov excitation spectrum, and spatial condensation in a trap. In these experiments, though, the lifetime of the polaritons has been just a little longer than their thermalization time, which means that nonequilibrium effects play an important role; in particular, the transition to superfluidity has been smeared out rather than a sharp transition. In this talk I report new results with polaritons that have very long lifetime compared to their thermalization time. We see a discontinuous jump in the properties of the polariton gas indicative of a true phase transition, and we see ballistic transport over hundreds of microns. We also now have a way to use a laser to create a potential barrier for the polaritons. Bio Snoke received his PhD in physics from the University of Illinois at Urbana-Champaign. He has worked for The Aerospace Corporation and was a visiting scientist and Fellow at the Max Planck Institute. In 2006, he was elected a Fellow of the American Physical Society with the citation, "For his pioneering work on the experimental and theoretical understanding of dynamical optical processes in semiconductor systems." His research has focused on basic processes and phase transitions of electrons, holes, including non equilibrium dynamics of electron plasma and excitons, the Mott transition from exciton gas to electron-hole plasma and Bose-Einstein condensation of excitons and polaritons. His research group at the University of Pittsburgh uses stress to trap excitons in confined regions, similar to the way atoms are confined in traps for Bose-Einstein condensation experiments. Light refreshments will be served. The Center for Excitonics is an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science and Office of Basic Energy Sciences

12 years, 5 months

[Aspuru-Guzik group list] [Aspuru-meetings-list] TODAY at 5pm: Biodiversity, Ecology, & Global Change with Lars O. Hedin

by Center for the Environment

Ecological studies are the bridge that link biodiversity and global change issues. Please join us at the Harvard University Center for the Environment and Bank of America series on Biodiversity, Ecology, and Global Change “Individuals, Ecosystems, and the Land Carbon Sink” Lars Hedin, Professor of Ecology and Evolutionary Biology and the Princeton Environmental Institute, Princeton University TODAY, Tuesday, November 15 5:00 pm Biolabs Lecture Hall Harvard University 16 Divinity Ave Cambridge, MA Professor Hedin will address the issue of scaling ecological and evolutionary properties of individual organisms to the global biosphere. He argues that ecosystem level properties are not sufficient for understanding the future land carbon sink. Instead, some of the most fundamental determinants of land carbon exchange depend on properties and interactions that occur at scales of individual organisms and that are expressed in local environments. Such scaling of organismal properties to global dynamics represent an emerging challenge to our conceptual and numerical models of the land biosphere. Lars Hedin is particularly interested in understanding how biogeochemical cycles are changing globally in response to large-scale modern human activities, and how such changes influence evolutionary environments of plants and microbes. While it is difficult to find ecosystems that are entirely free of human disturbances, he has for over a decade studied remote forests in southern Chile and Argentina that are historically free from atmospheric pollution, cutting, and other major human influences. These studies offer a "baseline" for how forests function naturally as biogeochemical systems, against which mechanisms and extents of human impacts can be better understood. He is presently expanding these studies to include tropical forests across the Hawaiian archipelago, the Amazon basin, Panama, and locations in Africa. The Biodiversity, Ecology, and Global Change lecture series is sponsored by the Harvard University Center for the Environment with generous support from Bank of America. The lecture will be followed by a reception. Contact: Lisa Matthews Assistant Director of Events and Communications Harvard University Center for the Environment 24 Oxford Street Cambridge, MA 02138 lisa_matthews(a)harvard.edu p. 617-495-8883 f. 617-496-0425 *|LIST_BIODIVERSITY|* [3]Unsubscribe aspuru-meetings-list(a)lists.fas.harvard.edu from this list. Links: 3. http://harvard.us1.list-manage1.com/unsubscribe?u=7532d1fbf18f39219ac742ebe… Our mailing address is: 24 Oxford St. Cambridge, MA 02138 T: (617) 495-0368 www.environment.harvard.edu Copyright (C) 2008 Harvard University. All rights reserved. [4]Forward this email to a friend Links: 4. http://us1.forward-to-friend.com/forward?u=7532d1fbf18f39219ac742ebe&id=46a… _______________________________________________ Aspuru-meetings-list mailing list Aspuru-meetings-list(a)lists.fas.harvard.edu https://lists.fas.harvard.edu/mailman/listinfo/aspuru-meetings-list

12 years, 5 months

[Aspuru-Guzik group list] ANNOUNCEMENT: Excitonics Seminar Series, Tues. Nov. 15, 3 pm/Grier A 34-401

by Cathy Bourgeois

Please post and forward to your group ALSO NOTE: this talk is in EECS Grier conf. room: 34-401A instead of the usual RLE Conf room Thanks. ---------------------------------------------------------------------------- -------------------------------- Center for Excitonics Seminar Series Announcement TUES, Nov 15, 2011 3:00 PM EECS Grier A Conference Room: 34-401A "Superfluid Phase Transition of Long-Lifetime Polaritons" David Snoke Department of Physics and Astronomy, University of Pittsburgh Abstract Polaritons are quasiparticles of electronic excitation in semiconductor structures with extremely light mass, about four orders of magnitude less than a free electron. Because of this very light mass, polaritons show Bose quantum effects even at moderate densities and temperatures from tens of Kelvin up to room temperature. In the past five years, multiple experiments have shown effects of polaritons analogous to Bose condensation of cold atoms, such as a bimodal momentum distribution, quantized vortices, Bogoliubov excitation spectrum, and spatial condensation in a trap. In these experiments, though, the lifetime of the polaritons has been just a little longer than their thermalization time, which means that nonequilibrium effects play an important role; in particular, the transition to superfluidity has been smeared out rather than a sharp transition. In this talk I report new results with polaritons that have very long lifetime compared to their thermalization time. We see a discontinuous jump in the properties of the polariton gas indicative of a true phase transition, and we see ballistic transport over hundreds of microns. We also now have a way to use a laser to create a potential barrier for the polaritons. Bio Snoke received his PhD in physics from the University of Illinois at Urbana-Champaign. He has worked for The Aerospace Corporation and was a visiting scientist and Fellow at the Max Planck Institute. In 2006, he was elected a Fellow of the American Physical Society with the citation, "For his pioneering work on the experimental and theoretical understanding of dynamical optical processes in semiconductor systems." His research has focused on basic processes and phase transitions of electrons, holes, including non equilibrium dynamics of electron plasma and excitons, the Mott transition from exciton gas to electron-hole plasma and Bose-Einstein condensation of excitons and polaritons. His research group at the University of Pittsburgh uses stress to trap excitons in confined regions, similar to the way atoms are confined in traps for Bose-Einstein condensation experiments. Light refreshments will be served. The Center for Excitonics is an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science and Office of Basic Energy Sciences

12 years, 5 months

[Aspuru-Guzik group list] [qip] Today and Tomorrow

by Edward Farhi

Hi Quanta Today Greg Kuperberg will speak at 4:00 on the fourth floor of 6C. We will meet on Tuesday at 11:00 and Greg will join us. Best, 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

12 years, 5 months

[Aspuru-Guzik group list] [Aspuru-meetings-list] Group meeting on Monday by Roberto

by Joel Yuen

When: Monday November 14 from 2 to 3 PM Where: Cabot Division Room at Mallinckrodt What: Roberto is up for group meeting: *Title: Machine Learning, Cheminformatics and Statistical Analysis for the Clean Energy Project* * * *Abstract:* In this group meeting, I will outline the supervised learning methods we are using for classifying and ranking molecules in the Clean Energy Project. I will specifically cover binary classification, where the optimization weights are binary, and thus we explore this method as a variable selection tool. Furthermore, these variables (i.e. descriptors) are used for regression methods, namely partial least squares and Gaussian processes, which I plan to explain more thoroughly. Finally, I will briefly outline statistical tools to obtain the significant building blocks for organic photovoltaics of our molecular database. We study the prevalence of these scaffolds using the hypergeometric distribution. -- Joel Yuen-Zhou PhD candidate in Chemical Physics Harvard University CCB, 12 Oxford St. Mailbox 107, Cambridge, MA, USA. _______________________________________________ Aspuru-meetings-list mailing list Aspuru-meetings-list(a)lists.fas.harvard.edu https://lists.fas.harvard.edu/mailman/listinfo/aspuru-meetings-list

12 years, 5 months

[Aspuru-Guzik group list] quick reminder

by Anna B. Shin

Dear Group, This is to remind you that if you're traveling, whether it be for group business or personal, we need your away dates (departure/arrival dates) for the Group Travel Calendar. Not only for safety reasons, the calendar has been a tremendously helpful resource for those who want to move up from the world of Siberia and print with abandon (not to say that we encourage excessive printing). With the holidays approaching, I want to remind you to send me your away dates as soon as you've finalized your travel, so we can maintain an accurate calendar. Thank you for your cooperation. Best, Anna Anna B. Shin Laboratory Administrator | Aspuru-Guzik Research Group Department of Chemistry and Chemical Biology | Harvard University 12 Oxford Street | Cambridge, MA 02138 617.496.9964 office | 617.694.9879 cell | 617.496.9411 fax http://aspuru.chem.harvard.edu/ <https://mail.google.com/mail/u/0/?ui=2&ik=e7480c62f0&view=att&th=12eee19970…>

12 years, 5 months

[Aspuru-Guzik group list] Fwd: Journal of Chemical Physics Invitation for a Special Issue on Nonadiabatic Dynamics

by Alan Aspuru-Guzik

If there are any volunteers for writing a paper for this issue, let me know. I can see many different projects fitting, and I want to get a hand-vote of who would be wiling to commit to write a paper for this issue. If not, I can assign somebody, as I have some ideas for this, Alan PS. Maggie Alán Aspuru-Guzik | Associate Professor Harvard University | Department of Chemistry and Chemical Biology 12 Oxford Street, Room M113 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu ---------- Forwarded message ---------- From: Journal of Chemical Physics <AsstEditor-jcp(a)chem.upenn.edu> Date: Fri, Nov 11, 2011 at 11:02 AM Subject: Journal of Chemical Physics Invitation for a Special Issue on Nonadiabatic Dynamics To: aspuru(a)chemistry.harvard.edu ** [image: AIP-JCP-Banner_inside.jpg]** **** November 11, 2011 ** ** Dear Prof. Aspuru-Guzik, ** ** The Journal of Chemical Physics is organizing a Special Issue on Nonadiabatic Dynamics to be published in summer 2012. This Special Issue builds on a symposium organized by Oleg Prezdho and Xiaosong Li at the ACS Meeting in San Diego on “Nonadiabatic Dynamics: Surface Hopping and Beyond”. Oleg and Xiaosong will serve as Guest Editors, working along with JCP Associate Editors Todd Martinez and Ernest Davidson to organize this issue. Special Topic Sections of the Journal of Chemical Physics have been published in the past, see http://jcp.aip.org/about/special_topics_section, and will become a more frequent feature of the Journal going forward. This Special Issue will lead off with a forward-looking Perspective article by John Tully. ** ** I write to invite you to contribute an original research article for this Special Issue on Nonadiabatic Dynamics. This special Journal of Chemical Physics issue aims for a timely discussion of modern developments, applications, and challenges in dynamics beyond the Born-Oppenheimer approximation. In spite of its fundamental role in shaping our ideas about chemical reactions and dynamics, the breakdown of the Born-Oppenheimer approximation is practically the rule for processes involving electronically excited states. Therefore, nonadiabatic molecular dynamics approaches are critical to diverse phenomena ranging from the scattering of small molecules off metal surfaces to solar energy conversion and biological phenomena such as vision. ** ** The Journal of Chemical Physics is putting together this Special Issue because we believe it will be very valuable to the community at this time. We envision publishing a collection of 20-30 papers focused on recent advances in the field of Nonadiabatic Dynamics, which will be combined on our website with links to seminal papers previously published in this Journal. These foundation papers will be made freely available to the community. ** ** Only papers specifically on theoretical studies of Nonadiabatic Dynamics will be included in this Special Issue. Papers on other topics, as determined by the editors, will be considered for publication in the Journal of Chemical Physics as regular articles following notification of the author(s), and will not be included in this issue. ** ** We encourage you to contribute an original research article to this Special Issue. You are of course welcome to have coauthors of the paper. *The deadline for contributions is May 1, 2012*. High-resolution color figures and multimedia content are encouraged. The article will be refereed, but the reviewers will be informed that it is an invited article. ** ** I sincerely hope you will accept this invitation. Please send us your decision by November 30, 2011. ** ** Sincerely yours, ** ** Marsha I. Lester Editor, The Journal of Chemical Physics and Sharon Martini Assistant Editor AsstEditor-jcp(a)chem.upenn.edu (215) 898-8307 (phone) / (215) 573-2842 (fax)

12 years, 5 months

[Aspuru-Guzik group list] Fwd: ITAMP Postdoctoral Fellowship

by Alan Aspuru-Guzik

Alán Aspuru-Guzik | Associate Professor Harvard University | Department of Chemistry and Chemical Biology 12 Oxford Street, Room M113 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu ---------- Forwarded message ---------- From: hrs <hrs(a)cfa.harvard.edu> Date: Fri, Nov 11, 2011 at 9:13 AM Subject: ITAMP Postdoctoral Fellowship To: Alan Aspuru-Guzik <aspuru(a)chemistry.harvard.edu> Dear Alan: I appreciate it if you could bring this to the attention of your colleagues. Regards, Hossein Institute for Theoretical Atomic Molecular and Optical Physics (ITAMP) at the Harvard-Smithsonian Center for Astrophysics and Harvard Physics Department accepts applications for postdoctoral fellowships in all areas of theoretical AMO physics by recent and aspiring graduates. The ad is here, http://careers.aps.org/jobs/4457253/postdoctoral-fellowship. Visit itamp.harvard.edu for information on how to apply. The deadline is Dec. 2, 2011.

12 years, 5 months

[Aspuru-Guzik group list] Fwd: The VCQ invites applications for the Vienna Quantum Fellowships

by Aspuru

Alan Aspuru-Guzik Associate Professor Harvard University http://aspuru.chem.harvard.edu Sent from my mobile. Please pardon any typos. Begin forwarded message: > From: "VCQ-Office" <vcq(a)quantum.at> > Date: November 11, 2011 6:40:46 AM EST > To: <alan(a)aspuru.com> > Subject: The VCQ invites applications for the Vienna Quantum Fellowships > > Dear Prof. Aspuru-Guzik! > > The Vienna Center for Quantum Science and Technology (VCQ) invites applications for the newly established Vienna Quantum Fellowships! > > We would like to ask you to bring the advertisement below (and attached) to the attention of appropriate candidates at your institute / department / group. > > Thank you very much in advance. > > With kind regards from Vienna, > Markus Aspelmeyer & Jörg Schmiedmayer > > --------------- > Vienna Center for Quantum Science and Technology (VCQ) > Faculty of Physics, University of Vienna > Boltzmanngasse 5 > 1090 Wien > phone: +43 1 4277 72531 > fax: +43 1 4277 9512 > email: vcq(a)quantum.at > http://vcq.quantum.at > > > > ++++++++++++++++++++++ > > > The Vienna Center for Quantum Science and Technology (VCQ) invites applications for the > > Vienna Quantum Fellowships > > These newly established Fellowships in Experimental or Theoretical Quantum Science will be awarded both on the PhD- and the postdoc-level on the basis of an international competition. The appointments are for a three-year duration. Postdoctoral Fellowships carry a competitive annual salary, and offer an annual research expense fund. PhD Fellowships will participate in the Vienna graduate program CoQuS. > > The Vienna Quantum Fellowship program has been established with the support from the Austrian Ministry of Science and Research to offer young scientists the best possible opportunity to develop their talents in the environment of the Vienna Center for Quantum Science and Technology (VCQ). > > The VCQ faculty provides a broad variety of research opportunities in the areas of Experimental and Theoretical Quantum Science (see http://vcq.quantum.at): > > Matter-wave interferometry and quantum atom optics > Micro- and nanoscale quantum optics and quantum optomechanics > Microoptics and novel quantum states of light > Cold atoms and degenerate quantum gases > Many-body quantum physics and quantum simulations > Entanglement-based quantum communication on Earth and via satellites > Quantum information and foundations of physics > > Application material should be sent to vcq(a)quantum.at > Copies of the curriculum vitae with email address, publications list and statement of research interests are required. The application should be accompanied by at least two letters of recommendation. > > Additional information can be obtained from http://vcq.quantum.at/fellowships > Deadline for the application is December 31, 2011. Fellowship candidates will automatically be considered for other available postdoctoral positions in their fields of interest. > > ++++++++++++++++++++++ >

12 years, 5 months

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aspuru-list November 2011