aspuru-list May 2011

aspuru-list@lists.fas.harvard.edu

23 participants
66 discussions

[Aspuru-Guzik group list] [Aspuru-meetings-list] meeting with Prof. Galli

by Johannes Hachmann

Hi everybody, It looks like we have a group slot with Prof. Galli from 9-10am tomorrow in the Division Room. I hope a number of you (in particular the CEP team) will turn up. Best wishes Johannes ----------------------------------------------- Dr. Johannes Hachmann Postdoctoral Fellow Aspuru-Guzik Research Group Harvard University Department of Chemistry and Chemical Biology 12 Oxford St, Rm M104A Cambridge, MA 02138 USA eMail: jh(a)chemistry.harvard.edu ----------------------------------------------- _______________________________________________ Aspuru-meetings-list mailing list Aspuru-meetings-list(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/aspuru-meetings-list

12 years, 11 months

[Aspuru-Guzik group list] [qip] today, tomorrow

by Edward Farhi

Hi Quanta We will meet tomorrow at 11 in 6-310. Steve Flammia is speaking today at 4 and will join us tomorrow. 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, 11 months

[Aspuru-Guzik group list] group seminar, TOMORROW, May 10, 11am-12pm, room M217

by Semion Saikin

Hello all, Prof. Yuriy Pershin from University of South Carolina will give a talk tomorrow about new electronic devices with memory effects. You are cordially invited to attend it! Thank you, Semion *Title*: *Memory effects in nanoscale structures* *Abstract*: Currently, there is a strong interest in memory effects in different systems. This is driven by prospects to create more efficient electronic devices with novel functionalities. I will introduce nanoscale devices with memory, namely, memristors, memcapacitors or meminductors, whose resistance, capacitance and inductance, respectively, depend on the past states through which the system has evolved. All these elements typically show pinched hysteretic loops in the two constitutive variables that define them. After an introduction to the theory and properties of memristors, memcapacitors and meminductors, I will discuss several memory phenomena in nanostructures related to spin, charge and ion dynamics and their far-reaching applications ranging from information storage to biologically-inspired circuits and computation.

12 years, 11 months

[Aspuru-Guzik group list] FW: Announcemenet: Excitonics Seminar, TOMORROW. May 10, 3pm, RLE Conf. 36-428

by Cathy Bourgeois

Please forward to your groups and post in your area. thanks Center for Excitonics Seminar Series Announcement Tuesday, May 10, 2011 3:00 PM RLE Conference Room: 36-428 Speaker: Benoît Deveaud-Plédran, Ecole Polytechnique Fédérale de Lausanne Bose-Einstein condensates of polaritons: Vortices and superfluidity Abstract The idea of a possible Bose Eintein condensation in the solid state has been explored since the beginning of the sixties with the hope to get transition temperatures much more accessible than the temperatures needed for the condensation of atomic vapors (less than 1µK for Rubidium). The advantage in solids is that people are trying to condense excitons (an electron-hole pair in a semiconductor) with a mass similar to that of an electron, i.e. four orders of magnitude less than a rubidium atom. The price to pay is the disorder inherent to any real solid state system as well as the limited lifetime of the quasiparticles. We are using exciton polaritons, quasiparticles made one half for excitons and one half from a confined photon. Polaritons are bosons with a mass five orders of magnitude lighter than an electron. Then, condensation at temperatures of the order of 300 K has been observed. The price to pay is the incredibly short lifetime of the polaritons : one picosecond. During this talk, I will detail our studies on the physical properties of polariton condensates. In particular, I will focus on the evidence for superfluidity through the observation of quantized vortices. I will show their time resolved behavior, and show the first direct evidence for half quantized vortices, a specialty of spinor condensates. Bio Benoit Deveaud-Plédran is a full professor in Physics at the Ecole Polytechnique Fédérale de Lausanne having received his Physics Engineering degree from the Ecole Polytechnique, Paris in 1974, his Masters degree in Optoelectronics from Rennes University in 1977, and his PhD from Grenoble University in 1984. Amongst his many awards and recognitions are the 1985 Young Researcher Award from Paris' Ministry of Defense, the 2004 Best Teacher Award from EPFL, and the 2009 Outstanding Referee Award from Physical Review Letters. He is a specialist in the optical spectroscopy of semiconductors with a particular dedication to ultrafast and coherent optical spectroscopy. Over the last few years his team has expanded the understanding of coherent optical spectroscopy by developing a whole ensemble of actively stabilized interferometers, able to perform spectral interferometry as well as a profound understanding of the physics of semiconductor microcavities. 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

12 years, 11 months

[Aspuru-Guzik group list] [Aspuru-meetings-list] Prof. Giulia Galli visit on May 10

by Johannes Hachmann

Hi everybody, Prof. Giulia Galli (http://angstrom.ucdavis.edu/) from UC Davis will be visiting the Boston area to give a talk as part of the shared Harvard/MIT/BU theoretical chemistry seminar series. The title and abstract are included below. Prof. Galli will be visiting the Harvard campus on Tuesday, May 10 from 9am - noon. I'll try to get a slot with her for the Aspuru-Guzik group - in particular the CEP team should meet with her. If you are interested as well, please send me an eMail so that I can keep you posted on when exactly we'll meet. The seminar will be on Wednesday, May 11, 4:00pm in MIT 4-149. Cheers, Johannes ----------------------------------------------- Understanding and predicting materials for energy: Insight from quantum simulations Giulia Galli University of California, Davis gagalli(a)ucdavis.edu http://angstrom.ucdavis.edu/ The understanding and prediction of fundamental properties of materials and molecular systems from the basic equations of quantum mechanics is an important component in the design of materials for energy applications. However the field of quantum simulations is still in its infancy and formidable theoretical and computational challenges lay ahead. After a general introduction of current first principles theories and techniques to describe molecules and condensed phases, we will discuss recent progress in predicting optical and thermoelectric properties of nanostructured materials, as well as some deceivingly simple fluids, i.e. water and hydrocarbons. We will then address open problems in quantum simulations of matter, especially the complex interplay between theory, computation, and experiment. _______________________________________________ Aspuru-meetings-list mailing list Aspuru-meetings-list(a)lists.fas.harvard.edu http://lists.fas.harvard.edu/mailman/listinfo/aspuru-meetings-list

12 years, 11 months

[Aspuru-Guzik group list] Thomas Renger

by Patrick Rebentrost

Dear All, as you might have seen Thomas Renger is visiting MIT on Tues. May 17. (He is an author of the often-cited Adolphs & Renger 2006 Biophys. J. paper.) There will be a student lunch at noon at MIT. In addition, there are meeting slots for 45 min throughout the day. I suggest the Aspuru-Guzik group takes the slot at 1:15 pm (alternative: 2 pm) after lunch. His seminar talk is at 3 pm. To get a head count, please let me know if you would like to attend the lunch and/or meeting. Also, please let me know if you have a preference w.r.t. meeting time or the options do not work for you at all. Thanks, Patrick ** *Abstract:* In photosynthesis, light energy absorbed in light-harvesting pigment-protein complexes is transferred via an exciton mechanism to the reaction center where it is used to drive electron transfer reactions. The quantum efficiency of the transfer is close to 100 percent, that is, almost all excitons created reach the reaction center. In order to bridge the gap between the crystal structures of these light-harvesting proteins and optical experiments probing their function, two essential problems need to be solved. On one hand, theories of optical spectra and excitation energy transfer have to be developed that take into account the pigment-pigment (excitonic) and the pigment-protein (exciton-vibrational) coupling on an equal footing. On the other hand, the parameters entering these theories need to be calculated from the structural data. I will give a summary of recent approaches to solve the above problems and discuss applications on different light-harvesting and reaction center complexes revealing different strategies for efficient light-harvesting. *BIO:* Born 1970 in Zittau (Germany). Study of physics at Humboldt-University Berlin (Germany), diploma (master degree) 1995, 1998 PhD degree in theoretical physics. 1999-2001 Feodor Lynen research scholar of Alexander von Humboldt-foundation at California Institute of Technology, Pasadena (USA). 2002-2009 head of junior research group (Emmy-Noether program of German Research Foundation) at Free University Berlin (Germany), institute of chemistry and biochemistry. Since 2009 head of division Theoretical Biophysics at Johannes Kepler University, Linz (Austria). Research: Theory of charge and excitation energy transfer and optical spectra of biological macromolecules, dynamical theory and its parametrization by quantum chemical/electrostatic methods and molecular dynamics simulations.

12 years, 12 months

[Aspuru-Guzik group list] Announcemenet: Excitonics Seminar, Tues. May 10, 3pm, RLE Conf. 36-428

by Cathy Bourgeois

12 years, 12 months

[Aspuru-Guzik group list] Fwd: [ PSI-K ] Research staff position at BOSCH Research, Cambridge, MA - Thermoelectrics

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 | http://about.me/aspuru ---------- Forwarded message ---------- From: PSI-K <psik-coord(a)dl.ac.uk> Date: Thu, May 5, 2011 at 7:14 PM Subject: [ PSI-K ] Research staff position at BOSCH Research, Cambridge, MA - Thermoelectrics To: PSI-K <psik-coord(a)dl.ac.uk> An announcement has been added in the "PSI-K" site at PSI-K ( http://cselnx9.dl.ac.uk:8080/portal) Subject: Research staff position at BOSCH Research, Cambridge, MA - Thermoelectrics Category: Job From: Boris Kozinsky Date: 06-May-2011 01:14 Message: Please see attachment Attachments: Bosch_research_abinitio_thermoelectrics.pdf<http://cselnx9.dl.ac.uk:8080/access/content/attachment/9e912646-383c-4de9-8…> ---------------------- 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.

12 years, 12 months

[Aspuru-Guzik group list] Fwd: [ PSI-K ] Research staff position at BOSCH Research, Cambridge, MA - Electrochemistry

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 | http://about.me/aspuru ---------- Forwarded message ---------- From: PSI-K <psik-coord(a)dl.ac.uk> Date: Thu, May 5, 2011 at 7:19 PM Subject: [ PSI-K ] Research staff position at BOSCH Research, Cambridge, MA - Electrochemistry To: PSI-K <psik-coord(a)dl.ac.uk> An announcement has been added in the "PSI-K" site at PSI-K ( http://cselnx9.dl.ac.uk:8080/portal) Subject: Research staff position at BOSCH Research, Cambridge, MA - Electrochemistry Category: Job From: Boris Kozinsky Date: 06-May-2011 01:19 Message: Please see attachment Attachments: Bosch_research_battery_catalysis.pdf<http://cselnx9.dl.ac.uk:8080/access/content/attachment/9e912646-383c-4de9-8…> ---------------------- 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.

12 years, 12 months

[Aspuru-Guzik group list] HUCE Weekly Calendar Email: You are now unsubscribed

by Center for the Environment

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12 years, 12 months

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aspuru-list May 2011