aspuru-list April 2014

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35 participants
87 discussions

[Aspuru-Guzik group list] ITAMP topical lunch discussion: Friday, May 2 @ 12:00

by tony.lee＠cfa.harvard.edu

ITAMP Topical Lunch Discussion Date: FRIDAY, May 2 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*: Johannes Bauer (Harvard) *Title: *Realizing Kondo-correlated states and dynamic phase transitions with ultracold atoms *Abstract*: I will summarize our recent proposal of a novel realization of Kondo physics with ultracold atomic gases. It is based on a Fermi sea of two different hyperfine states of one atom species forming bound states with a different species, which is spatially confined in a trapping potential. I show that different situations displaying Kondo physics can be realized when Feshbach resonances between the species are tuned by a magnetic field and the trapping frequency is varied. In the second part, I will also discuss some ongoing work on dynamic phase transition. For a fermionic system with a weak coupling instability I will present a non-equilibrium calculations to investigate the dynamics after an interaction quench. I will show under which conditions unstable modes are generated from a prethermal state and when we can expect to observe transient ordered states.

10 years

[Aspuru-Guzik group list] Fwd: Amit Singer will give a talk at the Applied Mathematics Colloquium on Monday, April 28 at 3 pm in MD G125.

by Martin Blood-Forsythe

---------- Forwarded message ---------- From: *Ryan Adams* <rpa(a)seas.harvard.edu> Date: Monday, April 28, 2014 Subject: Fwd: [Seas-faculty] TODAY: Amit Singer will give a talk at the Applied Mathematics Colloquium on Monday, April 28 at 3 pm in MD G125. To: Dougal Maclaurin <maclaurin(a)physics.harvard.edu>, Martin Blood-Forsythe <mbloodforsythe(a)physics.harvard.edu> Begin forwarded message: *From: *"Stevens, Arlene S." <astevens(a)seas.harvard.edu<javascript:_e(%7B%7D,'cvml','astevens(a)seas.harvard.edu');> > *Subject: **[Seas-faculty] TODAY: Amit Singer will give a talk at the Applied Mathematics Colloquium on Monday, April 28 at 3 pm in MD G125.* *Date: *April 28, 2014 at 9:06:46 AM EDT *To: *seas-faculty <seas-faculty(a)seas.harvard.edu<javascript:_e(%7B%7D,'cvml','seas-faculty(a)seas.harvard.edu');> > *APPLIED MATHEMATICS COLLOQUIUM* *Monday**, April 28, 2014* *3 pm in MD G125* *Amit Singer,* *Princeton University* *Three-dimensional Structure **Determination of Molecules **without Crystallization* In cryo-electron microscopy (cryo-EM), a microscope generates a top view of a sample of randomly-oriented copies of a molecule. The cryo-EM problem is to use the resulting set of noisy 2D tomographic projection images taken at unknown directions to reconstruct the 3D structure of the molecule. We will discuss methods for estimating the unknown orientations using variants of semidefinite programs (SDP) that were originally proposed in the theoretical computer science community for solving problems such as Max-Cut and Unique Games. Numerical evidence suggests that the SDP method is many cases tight, that is, it provides the maximum likelihood estimator despite the fact that the parameter space is exponentially large and non-convex. If time permit, we will also discuss the problem of heterogeneity, which is the task of mapping the space of conformational states of a molecule. Here we are able to estimate the covariance matrix of the 3D structures from their 2D projections. The proposed solutions has applications beyond cryo-EM such as low-rank matrix completion and determination of ground states of interacting particle systems. The analysis combines tools from tomography, convex optimization, group theory, and random matrix theory. No prior knowledge in these areas will be assumed. -- --------------------------------------------------- Martin Blood-Forsythe Graduate Student in Physics Harvard University Aspuru-Guzik Lab

10 years

[Aspuru-Guzik group list] Fwd: Frank Neese Visit 4/28

by Adrian Jinich

Hey Group, Anyone else want to have lunch with Frank Neese? best, Adrian ---------- Forwarded message ---------- From: Lemeshko, Mikhail <mlemeshko(a)cfa.harvard.edu> Date: Sun, Apr 27, 2014 at 11:57 AM Subject: Re: Frank Neese Visit 4/28 To: Adrian Jinich <ajinich(a)gmail.com> Cc: "Cynthia M. Chew" <aspuru-assistant(a)chemistry.harvard.edu>, Jorge Aguilera <iparrajorge(a)gmail.com>, Rafa Gómez Bombarelli < cortomaltesvive(a)gmail.com>, Tony Lee <tony.lee(a)cfa.harvard.edu>, Swati Singh <swati.singh(a)cfa.harvard.edu>, Richard Schmidt < richard.schmidt(a)cfa.harvard.edu> Dear Adrian, Yes, there will be spots available. Please let me know how many people will join from CCB. I cc ITAMP postdocs on this email as well. Swati, Tony, and Richard, please let me know if you'd like to have lunch with Frank Neese on Monday (04/27). I suggest we meet at 12:30 at Chang-Cho? All the best, Misha On Fri, Apr 25, 2014 at 12:13 PM, Adrian Jinich <ajinich(a)gmail.com> wrote: > Thanks Cynthia! > Hi Mikhail. I'm interested in attending the lunch. Please let me know if > there's a spot available. > Thanks > Adrian > On Apr 25, 2014 12:11 PM, "Cynthia M. Chew" < > aspuru-assistant(a)chemistry.harvard.edu> wrote: > >> Hi Rafa, Jorge, and Adrian, >> >> Thanks for responding! You are scheduled to meet with Frank on Monday >> from 11-11:45 in the theory couch area outside Alan's office. Alan will >> meet one-on-one with him from 11:45-12:15 and afterwards is lunch. >> >> If you are interested in going to the ITAMP-hosted lunch, please contact >> Mikhail Lemeshko, who is cc'ed here. Definitely go if your schedule allows! >> >> Best, >> Cynthia >> >> Cynthia M. Chew >> Faculty Assistant | Aspuru-Guzik Research Group >> Department of Chemistry and Chemical Biology | Harvard University >> 12 Oxford Street | Mallinckrodt 112 | Cambridge, MA 02138 >> 617.496.1716 office | 617.496.9411 fax >> http://aspuru.chem.harvard.edu/ >> >> >> On Thu, Apr 24, 2014 at 4:01 PM, Cynthia M. Chew < >> aspuru-assistant(a)chemistry.harvard.edu> wrote: >> >>> Dear group, >>> >>> If anyone is interested in meeting with Frank Neese this coming Monday, >>> April 28 from 11-12:30, please let me know by Friday morning. >>> >>> His ITAMP/CCB Joint Seminar will be at 2pm in Pfizer. >>> "Pushing the boundaries of wavefunction based ab initio approaches" >>> >>> Best, >>> Cynthia >>> >>> >>> Cynthia M. Chew >>> Faculty Assistant | Aspuru-Guzik Research Group >>> Department of Chemistry and Chemical Biology | Harvard University >>> 12 Oxford Street | Mallinckrodt 112 | Cambridge, MA 02138 >>> 617.496.1716 office | 617.496.9411 fax >>> http://aspuru.chem.harvard.edu/ >>> >> >> -- -- Dr. Mikhail Lemeshko Institute for Theoretical Atomic, Molecular, and Optical Physics (ITAMP) Harvard-Smithsonian Center for Astrophysics MS-14 60 Garden St. Cambridge, MA 02138 U.S.A. mlemeshko(a)cfa.harvard.edu http://sites.google.com/site/mishalemeshko/ Tel. +1 (617) 496-7610 Fax +1 (617) 496-7668 -- Adrian Jinich Aspuru-Guzik Lab Harvard University 12 Oxford Street Cambridge, MA 02138 ajinich(a)fas.harvard.edu http://aspuru.chem.harvard.edu/adrian-jinich/

10 years

[Aspuru-Guzik group list] Free gluten-free burger

by Cynthia M. Chew

Hi group, There is 1 free gluten-free burger from B-good in the big office next to the printer courtesy of Alan. Come get it! Cheers, Cynthia Cynthia M. Chew Faculty Assistant | Aspuru-Guzik Research Group Department of Chemistry and Chemical Biology | Harvard University 12 Oxford Street | Mallinckrodt 112 | Cambridge, MA 02138 617.496.1716 office | 617.496.9411 fax http://aspuru.chem.harvard.edu/

10 years

[Aspuru-Guzik group list] Symposium on Science @ ITAMP

by Hamilton, Joan

Dear All: The symposium on Science @ ITAMP will begin on Monday May 5 in Cambridge. A few tidbits of useful information: - The schedule is available at http://www.cfa.harvard.edu/itamp/alumiReunion14.html. All are invited to attend and participate in the sessions. The presentations will also be webcast. - There will be a Physics Colloquium associated given by Atac Imamoglu, a former ITAMP fellow, at 4:15 pm on Monday in Jefferson 250. - A poster session will be held in Jefferson Library at 5:30 pm, also on Monday. There are still a limited number of poster spaces available. If you wish to bring a poster (and have not already informed us), send a note to Naomi (ntariri(a)cfa.harvard.edu<mailto:ntariri@cfa.harvard.edu>). Hope to see you there. Naomi Tariri Program Coordinator The Institute for Theoretical Atomic, Molecular and Optical Physics Thank you Naomi -- Naomi Tariri Program Coordinator The Institute for Theoretical Atomic, Molecular and Optical Physics 60 Garden Street, MS 14 Cambridge MA 02138 617-495-9524 | http://www.cfa.harvard.edu/itamp/

10 years

[Aspuru-Guzik group list] Frank Neese Visit 4/28

by Cynthia M. Chew

Dear group, If anyone is interested in meeting with Frank Neese this coming Monday, April 28 from 11-12:30, please let me know by Friday morning. His ITAMP/CCB Joint Seminar will be at 2pm in Pfizer. "Pushing the boundaries of wavefunction based ab initio approaches" Best, Cynthia Cynthia M. Chew Faculty Assistant | Aspuru-Guzik Research Group Department of Chemistry and Chemical Biology | Harvard University 12 Oxford Street | Mallinckrodt 112 | Cambridge, MA 02138 617.496.1716 office | 617.496.9411 fax http://aspuru.chem.harvard.edu/

10 years

[Aspuru-Guzik group list] [qip] TALK: Isaac Kim, tomorrow (Apr 25), 1:30pm, 6C-442

by aram harrow

Isaac Kim (Perimeter Institute) On the Informational Completeness of Local Observables For a general multipartite quantum state, we formulate a locally checkable condition, under which the expectation values of certain nonlocal observables are completely determined by the expectation values of some local observables. The condition is satisfied by ground states of gapped quantum many-body systems in one and two spatial dimensions, assuming a widely conjectured form of area law is correct. Its implications on quantum state tomography, quantum state verification, and quantum error correcting code is discussed. _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

10 years

[Aspuru-Guzik group list] ITAMP topical lunch discussion: Friday, April 25 @ 12:00

by tony.lee＠cfa.harvard.edu

ITAMP Topical Lunch Discussion Date: FRIDAY, April 25 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*: Prof. Roberto Onofrio *Affiliations*: Department of Physics and Astronomy 'Galileo Galilei', University of Padua and ITAMP *Abstract*: Quantum physics and gravitation have been considered for a long time as two non-overlapping theories, with prevalent domain of applicability in the micro and macroworld, respectively. Yet, in our search for a unified picture of Nature we need to find situations in which there is cross-talk between the quantum and gravitation, to highlight possible contradictions and ways to overcome them. I will show how atomic physics may help to smooth out this situation, discussing two examples related to macroscopic consequences of the Higgs field in astrophysics and gravitation, and microscopic consequences of a conjecture in which weak interactions are interpreted as manifestations of gravity at the Fermi scale.

10 years

[Aspuru-Guzik group list] [qip] Friday the 25th

by Edward Farhi

Hi Quanta Tomorrow you will all meet without me at 11:00 in 6-310 as usual. Shalev Ben-David is going to tell you something interesting! Also there will be a talk at 1:30 by Isaac Kim. Best, Eddie Edward Farhi farhi(a)mit.edu _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

10 years

[Aspuru-Guzik group list] Fwd: Loeb Lectures by Marc Mézard, Director of Ecole Normale Supérieure, Paris - April 28th, Harvard University

by Alan Aspuru-Guzik

Of interest to many of us :) 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: Bankowski, Monika <bankowski(a)fas.harvard.edu> Date: Thu, Apr 24, 2014 at 10:33 AM Subject: Loeb Lectures by Marc Mézard, Director of Ecole Normale Supérieure, Paris - April 28th, Harvard University To: Science Lecture Series <science_lectures(a)fas.harvard.edu> Dear Science Community, Just a reminder, please join us next week for The Morris Loeb Lectures in Physics featuring Marc Mézard, Director of Ecole Normale Supérieure, Paris ( http://lptms.u-psud.fr/membres/mezard/<https://urldefense.proofpoint.com/v1/url?u=http://lptms.u-psud.fr/membres/m…>). Here are the details: *Monday, April 28 @ 4:15pm*, Colloquium in Jefferson 250, 17 Oxford Street, Cambridge (Tea in the Physics Library, Jefferson 450 @ 3:30pm) *“The spin glass cornucopia”* For more than 30 years, the spin glass puzzle has stimulated a large activity in statistical physics, and led to several breakthroughs. While the puzzle of spin glass materials is still not fully solved, their theoretical analysis has created a very rich conceptual framework, as well as powerful techniques, to study emergent properties of strongly disordered and interacting systems. These have been successfully applied to a broad spectrum of other disciplines, from finance to computer science and information theory, where slow -glassy- dynamics and phase transitions play a key role. The talk will survey this spin glass saga, focusing on its developments outside of physics. *Tuesday, April 29 @ 2:30pm*, Jefferson 250, 17 Oxford Street, Cambridge *“Phase transitions in hard computer science problems”* A new field of research is rapidly expanding at the crossroad between statistical physics, information theory and combinatorial optimization. It deals with problems which are very important in each of these fields, likespin glasses, error correction, or satisfiability. In recent years, it has been realized that physical phenomena, familiar from glass phenomenology, occur in large classes of algorithms that have been developed to study some of the hardest computer science problems. Realizing that extreme slowdown and glassy phase transitions occur in computer programs is interesting both theoretically, as it opens new perspectives to the study of algorithmic complexity, as well as practically : it allows to develop new kind of efficient algorithms, inspired from insights obtained through the “replica method” and the “cavity method’’. This talk will survey these recent developments, focusing on the conceptual leap induced by the use of spin glass theory in hard constraint satisfaction problems. *Wednesday, April 30 @ 2:00pm*, Science Center Hall A, One Oxford Street, Cambridge *“Occam’s razor in massive data acquisition: a statistical physics approach”* Science is facing several challenges related to data explosion. How to acquire a large amount of information in short time? How to extract significant data? In recent years, studies in compressed sensing have triggered very interesting developments on these issues. Compressed sensing consists in sampling a sparse signal at low rate, and later using computational power for its exact reconstruction, so that only the necessary information is measured. Currently used reconstruction techniques are, however, limited to acquisition rates larger than the true density of the signal. We shall describe new procedures, based on a statistical physics analysis, which is able to reconstruct exactly the signal with a number of measurements that approaches the theoretical limit for large systems. Please contact me if you have any questions. We’re looking forward to seeing you at the lectures. Kind regards, Monika Monika Bankowski | Administrator to the Chair | Department of Physics| Harvard University 17 Oxford St.| Jefferson Lab. Room 370 | Cambridge, MA 02138 | Tel: (617) 495-2866

10 years

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aspuru-list April 2014