aspuru-list March 2016

aspuru-list@lists.fas.harvard.edu

23 participants
63 discussions

[Aspuru-Guzik Group List] ITAMP lunch seminar - Francesco Casola, Harvard (Thu, 02/18)

by Igor Pikovski

As we don't expect any snow storms this week, we will have the talk by Francesco Casola (group Ron Walsworth), which had to be cancelled two weeks ago. See details below. Please note that the ITAMP seminars will now be held on Thursdays. *ITAMP Topical Lunch Discussion* Date: Thursday, February 18th Time: 12:00-1:30 pm Pizza will be served. Location: B-106 @ Center for Astrophysics (60 Garden Street) Directions: after entering the lobby of the CfA, turn right to enter the hallway of the B building. In the hallway, turn right again, and B-106 is there. *Speaker:* Francesco Casola(Harvard) *Title:*Harnessing one (electron spin) to measure them all *Abstract: *In recent years, the coherent manipulation and optical addressing of a single electronic spin in nitrogen-vacancy (NV) centers in diamond has emerged as a potential non-perturbative tool to obtain nanoscale spatial and quantitative local information of condensed matter magnetism. In this talk I will present fundamental concepts and review recent results of space-resolved NV magnetometry in the study of novel spin textures and collective spin dynamics of correlated electron systems. Beyond magnetic sensing applications, I will finally present ideas and outline challenges to observe coherent interactions between NVs and fundamental excitation modes in collinear ferromagnets. On 2/5/2016 10:06 AM, Igor Pikovski wrote: > Dear all, > > Due to the closure of the cfa, we will postpone today's Itamp seminar > to another day. > > Best, > Igor > > On 2/3/2016 1:07 PM, Igor Pikovski wrote: >> *ITAMP Topical Lunch Discussion* >> >> Date: Friday, February 5th >> Time: 12:00-1:30 pm >> Pizza will be served. >> >> Location: B-106 @ Center for Astrophysics (60 Garden Street) >> Directions: after entering the lobby of the CfA, turn right to enter >> the hallway of the B building. In the hallway, turn right again, and >> B-106 is there. >> >> *Speaker:* Francesco Casola(Harvard) >> >> *Title:*Harnessing one (electron spin) to measure them all >> >> *Abstract: *In recent years, the coherent manipulation and optical >> addressing of a single electronic spin in nitrogen-vacancy (NV) >> centers in diamond has emerged as a potential non-perturbative tool >> to obtain nanoscale spatial and quantitative local information of >> condensed matter magnetism. In this talk I will present fundamental >> concepts and review recent results of space-resolved NV magnetometry >> in the study of novel spin textures and collective spin dynamics of >> correlated electron systems. Beyond magnetic sensing applications, I >> will finally present ideas and outline challenges to observe coherent >> interactions between NVs and fundamental excitation modes in >> collinear ferromagnets. >> >> -- >> Dr. Igor Pikovski >> Institute for Theoretical Atomic, Molecular and Optical Physics (ITAMP) >> Harvard-Smithsonian Center for Astrophysics >> 60 Garden St, MS-14; Cambridge, MA 02138, USA >> Tel.: +1 (617) 496-7613 >> e-mail:igor.pikovski@cfa.harvard.edu >> www.cfa.harvard.edu/~igor.pikovski/ > > -- > Dr. Igor Pikovski > Institute for Theoretical Atomic, Molecular and Optical Physics (ITAMP) > Harvard-Smithsonian Center for Astrophysics > 60 Garden St, MS-14; Cambridge, MA 02138, USA > Tel.: +1 (617) 496-7613 > e-mail:igor.pikovski@cfa.harvard.edu > www.cfa.harvard.edu/~igor.pikovski/ -- Dr. Igor Pikovski Institute for Theoretical Atomic, Molecular and Optical Physics (ITAMP) Harvard-Smithsonian Center for Astrophysics 60 Garden St, MS-14; Cambridge, MA 02138, USA Tel.: +1 (617) 496-7613 e-mail: igor.pikovski(a)cfa.harvard.edu www.cfa.harvard.edu/~igor.pikovski/

8 years

[Aspuru-Guzik Group List] Ksenia Bravaya Theochem visit, Apr. 5th

by Jennifer Wei

Hi Everyone, Professor Ksenia Bravaya <http://people.bu.edu/kbravgrp/research/index.html> of BU is coming on April 5th to as part of the Theochem series. Research in her group spans electronic structure methods development Autoionizing Resonance States, Equation-of-Motion Coupled Cluster methods, and applications of these methods to biochromophores, fluorescent proteins, and cytochromes. Follow the link for a more detailed description of her research. She will only be at Harvard for the afternoon and dinner on Tues. Apr. 5th. Please let me know if you are interested in meeting with her in the afternoon or joining us for dinner. Prof. Bravaya's Theochem talk will be on Wed., April 6th at 4pm at MIT Building 4, Room 163. Abstract to follow Cheers, Jennifer

8 years

[Aspuru-Guzik Group List] Special group meeting on Friday, April 1st: Postdoc candidate Jonathan Olson

by Salvatore Mandrà

Hi Everyone, This Friday (April 1st), the Postdoc candidate Jonathan Olson from Louisiana State University (Physics) will give a job interview to our group. The talk will be in the Division Room from 2pm to 3.30pm (the schedule is in attachment). Follows the abstract of the talk: ---- Title: The Ultimate Limits of Measurement --- Metrology from Single Photons Abstract: Metrology deals with the task of measuring unknown quantities and determining how certain our measurements can be about the “true” value of a variable. Optical interferometry has been an incredibly useful resource for making precision measurements about the properties of many systems, recently culminating in the breakthrough discovery of gravity waves by the LIGO collaboration. In this talk, I will describe the evolution of quantum metrology, and give some examples of the way interferometers can exploit the quantum properties of light to make higher precision measurements than could ever be done in a classical world. Finally, I will describe my work in developing a new architecture -- inspired by Boson Sampling -- which hopes to make practical quantum sensors a reality. ---- Kind regards, Salvatore

8 years

[Aspuru-Guzik Group List] Machine Learning meetings (topics, dates)

by Benjamin Sanchez Lengeling

Hi all, We have setup a google docs to help organize topics and days for the Machine Learning subgroup meetings: https://docs.google.com/document/d/1HLT8-z768KJe40_gDw3SSVJdET4wqM2_Iy3DFVq… <https://docs.google.com/document/d/1HLT8-z768KJe40_gDw3SSVJdET4wqM2_Iy3DFVq…> We will have it* open for a week* and then add the dates to the group calendar. *What to do with it?* Add or pick a topic you want to learn about and if you feel brave choose a day to present it. Topics can be applications, tutorials, recent Chemistry + ML articles, what every you want to show off. *Meeting times:* Meetings vary between 2 to 3pm on Mondays and Wednesday, optimized around Alan's schedule and other requests we received. Present ion should aim to take around 2 0 -30 mins...the rest should be filled with questions in-between and discussion. Hope all is well, Ben and Jennifer

8 years

[Aspuru-Guzik Group List] Final group spam.

by Alan Aspuru-Guzik

Dear all, Christoph, David and myself are also signing up for this 10K on May 1st. http://www.run4scituate.com/ In case anybody wants to go to this one instead/as well. 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

8 years

[Aspuru-Guzik Group List] AAG Group Half-Marathon!

by Jacob Sanders

Dear Group Members, Alan, Christoph, and I will be competing in the *Horseneck Half Marathon* on *Sunday, May 22. *It is in *Westport, MA *about one hour south of Boston and the course features running along the beach. We will probably go there together on Saturday, stay in a hotel Saturday night, and then run on Sunday. The website for the half marathon is here: http://horseneckhalf.com/ We invite anyone in the group who is interested in running to register for the race and join us! *If you register, please use this link: http://rcm.nu/1ooFd9g <http://rcm.nu/1ooFd9g>* Looking forward to running with many of you! It should be a fun time for all of us! Cheers, Jacob

8 years

[Aspuru-Guzik Group List] [qip] Friday April 1

by Edward Farhi

Hi Quanta We will meet on Friday April 1 at 11:00 in 6-310. My little book says that Layla Hormozi is scheduled to tell us about her work. See you there. Eddie Edward Farhi Director Center for Theoretical Physics Massachusetts Institute of Technology farhi(a)mit.edu _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

8 years

[Aspuru-Guzik Group List] Group Meeting, Mar 31, 2:30 PM, Div Room

by Ian Kivlichan

Hi all, Sorry for the late reminder - today Thomas will give group meeting. Note that it's for an indepenedent research proposal. See below for the title and abstract. As always, the group calendar and group meeting schedule <https://docs.google.com/spreadsheets/d/1LioqdopHr5ZAmn0GaCQwLUTYoU4ZJuvfrMY…> are kept up to date in case I fall asleep too early without sending an abstract.. If you'd like to give a group meeting to practice a talk etc, let me know. Apart from that, group meetings will be shifting an hour later (to a 3:30 start) beginning in mid-May or early June - more on this later. Best, Ian ------------------------------------- Speaker: Thomas Markovich Title: How I Learned to Stop Worrying and Love TDDFT Abstract: I will present some recent work that I've done with building dispersion corrections into time dependent density functional theory (TDDFT). The talk will start with a motivating example, and then move to a (hopefully) clear exposition of DFT and TDDFT. Building on this, the failures of TDDFT will be explored. In particularly, I will explain physically why TDDFT fails for excitations with significant charge transfer character, and I will provide some theoretical rationale for why dispersion corrections could provide a way forward. I will present a couple provocative, but by no means complete, computational examples where dispersion has an effect. Finally, I will present a multi-step road map for this project. Please note: I will be practicing my independent research proposal, so this will be a speculative group meeting.

8 years

Re: [Aspuru-Guzik Group List] Excitonics Seminar: Delia Milliron - April 5 - 4:30pm in 34-401A

by Catherine M Bourgeois

Correction for room number: This seminar will be held in 34-401A From: Catherine M Bourgeois Sent: Tuesday, March 29, 2016 3:07 PM To: 'efrc-all(a)mit.edu' <efrc-all(a)mit.edu> Subject: Excitonics Seminar: Delia Milliron - April 5 - 4:30pm in 36-428 Please post and forward to your groups: CENTER FOR EXCITONICS SEMINAR SERIES presents: Plasmonic metal oxide nanocrystals April 5, 2016 at 4:30pm/34-401A Delia Milliron Department of Chemical Engineering, The University of Texas at Austin [Delia-Milliron.01] Degenerately doped metal oxide semiconductors, like ITO, exhibit plasmonic resonance at near and mid-infrared wavelengths tunable by varying their composition. Nanocrystals of many such materials have now been synthesized and applications are emerging that leverage the responsiveness of their localized surface plasmon resonance (LSPR) to electronic charging and discharging. For example, we are developing a new class of electrochromic glass that can dynamically control heat loads and daylighting in buildings to save energy and enhance comfort of building occupants. Further applications of these novel plasmonic nanocrystals will hinge, in part, on their ability to concentrate infrared light into nanoscale volumes and to enhance electronic and vibrational state transitions via associated field enhancement effects. Through simulations, we have predicted high field enhancement factors exceeding 300x for faceted nanocrystals. Experimentally, we can assess the potential of plasmonic oxide nanocrystals for field enhancement by observing the homogeneous LSPR linewidth, which is inversely related to the dephasing time. We have sought to distinguish this intrinsic linewidth from the heterogeneous broadening that is always present for colloidal nanoparticles. Measuring LSPR spectra of individual nanocrystals by tip-enhanced synchrotron FTIR spectroscopy we find single nanocrystals can have linewidths less than half of the corresponding ensembles. Thus, the dephasing times are long and plasmonic oxide nanocrystals have great potential for diverse applications in energy. I will conclude with an outlook on how materials chemistry enables the tuning of LSPR properties by design. Delia J. Milliron is an Associate Professor in the McKetta Department of Chemical Engineering at the University of Texas at Austin and a Fellow of the Henry Beckman Professorship. She also serves as an Associate Editor for the journal Nano Letters. Dr. Milliron received her PhD in Chemistry from the University of California, Berkeley, in 2004. From 2004 to 2008 she worked for IBM's research division, initially as a postdoctoral researcher and subsequently as a member of the research staff. In 2008, she joined the research staff at the Molecular Foundry, Lawrence Berkeley National Lab, where she served as the Director of the Inorganic Nanostructures Facility and later as the Deputy Director. Dr. Milliron's awards include a Sloan Research Fellowship, a DOE Early Career award and a Resonate Award from Caltech's Resnick Institute. Her research is motivated by the potential for nanomaterials to introduce new functionality to and reduce manufacturing costs of energy technologies. Her group's activities span from the fundamental chemistry and assembly pathways of nanomaterials to device integration and characterization. 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 Light refreshments will be served

8 years

[Aspuru-Guzik Group List] Fwd: students connecting youth

by Alan Aspuru-Guzik

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 ---------- Forwarded message ---------- From: Fisher, Vanessa <vfisher(a)cambridgema.gov> Date: Tue, Mar 29, 2016 at 4:13 PM Subject: students connecting youth To: Hello Harvard University faculty of Arts and Science, My name is Vanessa Fisher and I am the Preteen and Middle School Program Director at the Frisoli Youth Center. I am emailing to see if there are any art or science students that would be interested in running a workshop with youth during our April vacation week 4/19-22/2016 from 9:00am-6:00pm. Our focus for youth during the vacation week is on S.T.E.A.M. (science, technology, engineering, arts, and mathematics). We will be encouraging youth to use science in everyday situations and create hypotheses and conduct experiments. We have a broad range of activities going on for the week and any youth friendly experiment or experience is our ask. Please connect back with me if there is a possible way to have a Harvard student/s facilitate an hour long (or more) workshop for youth based on an aspect of STEAM. Also, please feel free to forward this email out if you feel there may be someone else to connect with in the department. I look forward to connecting. Thank you, Vanessa Fisher Preteen and Middle School Program Diretor Frisoli Youth Center 61 Willow Street Cambridge,MA Desk: (617) 349-7746 Email: vfisher(a)cambridgema.gov *" When you get, give. When you learn, teach." -Maya Angelou*

8 years

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aspuru-list March 2016