aspuru-list November 2014

aspuru-list@lists.fas.harvard.edu

20 participants
46 discussions

[Aspuru-Guzik group list] [qip] Friday the 14th

by Edward Farhi

Hi Quanta Greetings from my home where I am entombed with my big cast. I will not make it tomorrow to the group meeting but please meet without me. My notes say that Ryan Babbush will be speaking. Also there is a seminar in the afternoon by Lorenza Viola. Sorry to miss everything! Eddie Edward Farhi farhi(a)mit.edu _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 5 months

[Aspuru-Guzik group list] ITAMP lunch seminar - Andrei Derevianko, Reno (11/14)

by Richard Schmidt

Dear colleagues, it's a great pleasure to announce our next ITAMP's lunch seminar held on Friday by ITAMP guest professor Andrei Derevianko from the University of Nevada, Reno. Kind regards, Richard Schmidt ITAMP Topical Lunch Discussion Date: Friday, November 14th 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: Andrei Derevianko, University of Nevada, Reno Title: Hunting for topological dark matter with atomic clocks Abstract: Atomic clocks are arguably the most accurate scientific instruments ever build. Modern clocks are astonishing timepieces guaranteed to keep time within a second over the age of the Universe. Attaining this accuracy requires that the quantum oscillator be well protected from environmental noise and perturbations well controlled and characterized. This opens intriguing prospects of using clocks to study subtle effects, and it is natural to ask if such accuracy can be harnessed for dark matter searches. The cosmological applications of atomic clocks so far have been limited to searches of the uniform-in-time drift of fundamental constants. We point out that a transient in time change of fundamental constants can be induced by dark matter objects that have large spatial extent, and are built from light non-Standard Model fields. The stability of this type of dark matter can be dictated by the topological reasons. We point out that correlated networks of atomic clocks, such as atomic clocks onboard satellites of the GPS constellation, can be used as a powerful tool to search for the topological defect dark matter. In other words, one could envision using GPS as a 50,000 km-aperture topological dark-matter detector. Reference: A. Derevianko and M. Pospelov, arXiv:1311.1244 --------------------------- Dr. Richard Schmidt 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. richard.schmidt(a)cfa.harvard.edu Tel. +1 (617) 496-7610 Fax +1 (617) 496-7668

9 years, 5 months

[Aspuru-Guzik group list] [IACS-events] SAVE-THE-DATE: IACS Seminar with William Henshaw (Rensselaer Polytechnic Institute)--- Friday, 11/14 @ 1pm

by Baker, Natasha

Date: Friday, November 14, 2014 Location: Maxwell Dworkin G115, 33 Oxford Street, Cambridge MA 02138 Speaker: William Henshaw, Margaret A. Darrin Distinguished Professor in Applied Mathematics at Rensselaer Polytechnic Institute Time: Informal lunch with speaker, 12:30pm; talk, 1:00pm Title: Over-coming the fluid-structure added-mass instability for incompressible flows Abstract: The added-mass instability has, for decades, plagued partitioned fluid-structure interaction (FSI) simulations of incompressible flows coupled to light solids and structures. Many current approaches require tens or hundreds of expensive sub-iterations per time-step. In this talk two new stable partitioned algorithms for coupling incompressible flows with both compressible elastic bulk solids and thin structural shells are described. These added-mass partitioned (AMP) schemes require no sub-iterations, can be made fully second-or higher-order accurate, and remain stable even in the presence of strong added-mass effects. Extensions of the schemes to treat large solid motions using deforming overlapping grids and the Overture framework will also be described. gCal<http://www.seas.harvard.edu/calendar/event/77971/feed.ics> ; iCal<webcal://www.seas.harvard.edu/calendar/event/77971/feed.ics> <https://email.seas.harvard.edu/owa/UrlBlockedError.aspx> *********************** UPCOMING SEMINARS 11/21 Aaron Adcock and Shankar Kalyanaraman (Facebook) Visit http://iacs.seas.harvard.edu/events to subscribe to our Google calendar, manage your subscription to this mailing list, or access video and audio recordings of previous seminars. _______________________________________________ Iacs-events mailing list Iacs-events(a)seas.harvard.edu https://lists.seas.harvard.edu/mailman/listinfo/iacs-events

9 years, 5 months

[Aspuru-Guzik group list] Intel Phi Processors

by Jonathan Welch

For those who are interested…. The intel Phi Xeon is on sale as a PCI express card for 142$ on amazon right now http://www.amazon.com/gp/product/B00OMCB4JI/ref=as_li_tl?ie=UTF8&camp=1789&… <http://www.amazon.com/gp/product/B00OMCB4JI/ref=as_li_tl?ie=UTF8&camp=1789&…> Kind Regards, Jon

9 years, 5 months

[Aspuru-Guzik group list] [qip] Thursday, 2pm: John Wright (CMU) on Quantum Spectrum Testing

by Henry Yuen

Hi all, This Thursday at 2pm, John Wright from CMU will tell us about his work on Quantum Spectrum Testing (joint work with Ryan O'Donnell), which will be presented at the upcoming Quantum Information Processing conference. Hope to see you there! Time, location, and abstract below. -Henry *Speaker*: John Wright (CMU) *Time*: Thursday, November 13, 2 - 3pm. *Room*: 32-G575 *Title*: Quantum Spectrum Testing *Abstract:* In recent years, the area of property testing of probability distributions has produced a wide variety of interesting results. Here one is given sample access to an unknown distribution and asked whether it satisfies some property, e.g. is it the uniform distribution, does it have small entropy, and so forth. In this work, we study the natural quantum analogue of this problem, in which one is given many copies of an unknown mixed state (the quantum version of a probability distribution) and asked whether it satisfies a given property. We focus on properties which depend only on the mixed state's spectrum (hence the name Quantum Spectrum Testing). Our paper gives several optimal algorithms for testing specific properties of mixed states, e.g. the property of being the maximally mixed state. This can be viewed as the quantum analogue of a result of Paninski. In addition, we show a nearly-tight lower bound for the well-known "empirical Young diagram algorithm" which learns an unknown mixed state's spectrum. Our main tool is Schur-Weyl duality, which leads us to studying a particular algorithm called weak Schur sampling. This algorithm is based on the representation theory of the symmetric group, and to analyze it we use various tools in this area, including Kerov's algebra of observables and a limiting theorem of Biane. No background in quantum computing or representation theory is assumed. *This is joint work with Ryan O'Donnell.* _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 5 months

[Aspuru-Guzik group list] Fwd: Lincoln Laboratory Invites You to ARTS 2014

by Alan Aspuru-Guzik

---------- Forwarded message ---------- From: *ARTS14* <ARTS14(a)ll.mit.edu> Date: Monday, November 10, 2014 Subject: Lincoln Laboratory Invites You to ARTS 2014 To: d.w.bliss(a)asu.edu, shyam(a)bu.edu, wckarl(a)bu.edu, srv(a)bu.edu, Robert_Hurt(a)brown.edu, Iris_Bahar(a)brown.edu, veloso(a)cs.cmu.edu, bergman(a)ee.columbia.edu, ds925(a)cornell.edu, snavely(a)cs.cornell.edu, alexander.hartov(a)dartmouth.edu, keith.d.paulsen(a)dartmouth.edu, egralla(a)gwu.edu, wenke(a)cc.gatech.edu, airoldi(a)fas.harvard.edu, alan(a)aspuru.com, capasso(a)seas.harvard.edu, livers(a)pih.org, alexander_meissner(a)harvard.edu, vahid(a)seas.harvard.edu, pbos(a)kent.edu, jselinge(a)kent.edu, mas(a)egr.msu.edu, william.bundy(a)usnwc.edu, tran(a)control.math.ncsu.edu, vingle(a)ece.neu.edu, kaeli(a)ece.neu.edu, ek(a)ccs.neu.edu, j.martinez-lorenzo(a)neu.edu, wkr(a)ccs.neu.edu, nian(a)ece.neu.edu, wanunu(a)neu.edu, burkholder.1(a)osu.edu, dapino.1(a)osu.edu, schniter(a)ece.osu.edu, david.barrett(a)olin.edu, aaron.hoover(a)olin.edu, christopher.lee(a)olin.edu, sbilen(a)psu.edu, jyen(a)ist.psu.edu, dperouli(a)purdue.edu, tmt(a)ecn.purdue.edu, koushik(a)ecse.rpi.edu, tichyj(a)rpi.edu, yener(a)cs.rpi.edu, figer(a)cfd.rit.edu, prhemmer(a)ece.tamu.edu, behrouz.abedian(a)tufts.edu, bobg(a)eecs.tufts.edu, William.Martel(a)tufts.edu, eric.miller(a)tufts.edu, arthur.cartwright(a)us.af.mil, samuel.amber(a)usma.edu, guy.burrow(a)usma.edu, johnm(a)nsstc.uah.edu, nleisso(a)neoninc.org, razavi(a)ee.ucla.edu, massimo(a)ece.ucsd.edu, tom.woods(a)lasp.colorado.edu, willett(a)udel.edu, burgett(a)ifa.hawaii.edu, kwiat(a)illinois.edu, edowaks(a)umd.edu, jensen(a)cs.umass.edu, neal(a)astro.umass.edu, frasier(a)ecs.umass.edu, Andrew_Gatesman(a)uml.edu, Peter_Avitabile(a)uml.edu, david.paydarfar(a)umassmed.edu, ematkins(a)umich.edu, rajnrao(a)eecs.umich.edu, jmf(a)cs.unc.edu, butler(a)cs.uoregon.edu, mark.bocko(a)rochester.edu, shri(a)sipi.usc.edu, r.hebner(a)cem.utexas.edu, bcalhoun(a)virginia.edu, rcogill(a)virginia.edu, ah7sj(a)virginia.edu, roy(a)ee.washington.edu, teresa.balselsholz(a)valpo.edu, tcc(a)vt.edu, nehorai(a)ese.wustl.edu, kichon(a)wpi.edu, ted(a)wpi.edu, heineman(a)wpi.edu, ym(a)wpi.edu, wrm(a)wpi.edu, stafford(a)wpi.edu, alexw(a)wpi.edu Dear Lincoln Laboratory Collaborators, We would like to invite you to our Advanced Research and Technology Symposium (ARTS) on December 2nd and 3rd at the MIT Media Laboratory. This event will highlight a number of our collaborative projects and is open to academic attendees at no cost. We hope that this event will be an excellent chance for you, your students and your colleagues to learn more about Lincoln Laboratory and to connect with the government and industry attendees who are also invited. Please forward this invitation to others who you think would be interested in attending and follow the link below for additional details, including registration information. [image: Arts 2014 Photonics Technologies and Applications, Data and Computation, Man and Machine] *Registration Deadline Approaching* *2014 Advanced Researchand Technology Symposium * December 2 and 3, 2014 MIT Media Lab, Cambridge, MA [image: Speakers] *Registration closes November 21, 2014*To register, visit*https://conferences.ll.mit.edu/arts <https://conferences.ll.mit.edu/arts/>* [image: Lincoln Laboratory, Massachusetts Institute of Technology Logo, MIT Logo] -- 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

9 years, 5 months

[Aspuru-Guzik group list] FYI (event on photovoltaic)

by guerreschi＠fas.harvard.edu

FYI (event on photovoltaic): http://www.swissnexboston.org/event/lifting-the-veil-on-advancement-in-sola… G

9 years, 5 months

[Aspuru-Guzik group list] Admin Office Closed Today

by Aspuru Lab Email

Dear Group, The office will be closed today. Sorry for the inconvenience. Marlon G. Cummings

9 years, 5 months

[Aspuru-Guzik group list] [qip] Seminar - Alán Aspuru-Guzik (this Friday)

by Cyril Stark

Hi Everybody, This Friday’s QIP seminar will be given by Alán Aspuru-Guzik from Harvard University. Title: Compressing wave functions: The NO MAGIC algorithm Place: 6C-442 Time: 1:30 Abstract: In this talk, I will describe recent work by my graduate student Jarrod McClean and myself (arXiv:1409.7358v1). The Non-Orthogonal Multicomponent Adaptive Greedy Imaginary Compression (NO MAGIC) scheme seeks to compress wave functions for many-body quantum systems by a combination of imaginary-time evolution, orthogonal matching pursuit and the use of non-orthogonal determinants. The algorithm can represent molecular wave functions very accurately with few (non-orthogonal) determinants. In this talk, I will go over the method and a bit of the history of quantum chemistry ansatze. We see opportunities for the use of this method in the context of many-body quantum systems of interest in physics and also as a complementary approach for building non-orthogonal multicomponent tensor networks. I will go over these as well to hopefully begin discussion with the audience about these possible next steps. I hope you can come. Best, Cyril -- Cyril Stark Center for Theoretical Physics Massachusetts Institute of Technology 77 Massachusetts Ave, 6-304 Cambridge, MA 02139, USA _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 5 months

[Aspuru-Guzik group list] New Group Laser Pointer

by Marlon Cummings

Please return it. ----------- 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/

9 years, 5 months

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aspuru-list November 2014