aspuru-list May 2014

aspuru-list@lists.fas.harvard.edu

31 participants
68 discussions

[Aspuru-Guzik group list] [qip] Seminar Tuesday 12pm in 4-331

by Shelby Kimmel

Hi Everyone, This seminar might be of interest: Please join us at *12:00pm on Tuesday, May 20 * for a Condensed Matter Physics Seminar with Claudio Chamon from Boston University. The details of Claudio's presentation are listed below *Title: * *"*Emergent irreversibility and entanglement spectrum statistics *"* *Abstract:* We study the problem of irreversibility when the dynamical evolution of a many-body system is described by a stochastic quantum circuit. Such evolution is more general than a Hamitonian one, and since energy levels are not well defined, the well-established connection between the statistical fluctuations of the energy spectrum and irreversibility cannot be made. We show that the entanglement spectrum provides a more general connection. Irreversibility is marked by a failure of a disentangling algorithm and is preceded by the appearance of Wigner-Dyson statistical fluctuations in the entanglement spectrum. This analysis can be done at the wave function level and offers an alternative route to study quantum chaos and quantum integrability. *Date*: Tuesday May 20, 2014 Time: 12:00pm Location: Duboc Seminar Room (4-331) -- Shelby Kimmel PhD Candidate in Physics Massachusetts Institute of Technology www.mit.edu/~skimmel _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 11 months

[Aspuru-Guzik group list] Excitonics Seminar: TODAY, 2 PM, 36-428

by Catherine M Bourgeois

Please post and forward to you groups, thanks! ______ excitonics seminar series [http://www.rle.mit.edu/excitonics/images/MarcoPolini.jpg] Marco Polini NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore di Pisa Plasmonic Figures of Merit in a Doped Graphene Sheet Thursday, May 15, 2014 RLE Conference Room - 36-428 2:00 - 3:00 pm* *note time change Abstract: "Dirac" plasmons are self-sustained density oscillations that occur in a doped graphene sheet. These collective modes have recently attracted enormous experimental interest for their potential use in plasmonic circuits. In this talk I will discuss the two most important figures of merit of `graphene plasmonics', namely the ratio between the Dirac plasmon wavelength and the illumination wavelength, and the Dirac plasmon damping rate. More precisely, I will first discuss the fundamental properties of the Dirac plasmon dispersion, highlighting the main differences with respect to plasmons in ordinary two-dimensional parabolic-band electron liquids. I will then emphasize the subtle difference between plasmon lifetime and Drude transport scattering time. Finally, I will present a theoretical framework that allows to calculate in a fully microscopic fashion Dirac plasmon damping rates due to electron-electron, electron-impurity, and electron-phonon collisions. Bio Marco Polini received a Laurea degree in Physics from the University of Pisa in 1999 and a Ph.D. in Physics from Scuola Normale Superiore, Pisa (Italy) in 2003. In 2003, he was a Visiting Postdoctoral Researcher at the University of Texas at Austin with Prof. Allan H. MacDonald's research group. He was a Visiting Professor at the Zhejiang Normal University, China, with Prof. Xianlong Gao and his team in 2007-2008 and at the Texas A&M University (College Station, Texas) in Prof. Jairo Sinova's group in 2012. In 2010, Marco received a prize for "the best foreign researcher who has the largest number of collaborations with Iranian counterparts" from the Iran Nanotechnology Initiative Council (INIC). In that same year he was awarded the prestigious Italian grant "FIRB - Futuro in Ricerca.<http://www.plasmograph.it/> " Currently he is a Researcher and Assistant Professor at NEST, NEST, Istituto Nanoscienze-CNR<http://www.nano.cnr.it> and Scuola Normale Superiore di Pisa<http://www.sns.it/en/> since 2008. His field of research is in condensed matter theory with more than 100 publications in peer-reviewed international journals including Science, Nature Materials, Nature Nanotechnology, Nature Photonics, Nature Communications, and Physical Review Letters. Light refreshments will be served

9 years, 11 months

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

by Edward Farhi

Hi Quanta Today at 11:00 Umesh Vazirani is speaking in 6c-442. Please come! Tomorrow we will have our group meeting at 11:00 in 6-310 as usual. Umesh will be there as will Robin Kothari so there will be plenty to discuss. At 1:30 Robin is speaking in our seminar series. See you! 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

9 years, 11 months

[Aspuru-Guzik group list] Aspuru Group Meeting Thursday 15th at 2:30 pm in Cabot Division Room

by Felipe Herrera

Dear group, Tomorrow Kai Trepte will tell us about the status of the Flaskbox project. Please see the abstract below. Best, Felipe Herrera *Abstract:* There has been a lot of work in the "cloud forest." This session will provide an update on the progress that has been made on the Flaskbox project and request input from the group as the team moves towards launching. In addition, we will discuss the exciting new world of "Apps" where lab members and collaborators can place there code (to monetize it) for others to use. The team is looking forward to your input.

9 years, 11 months

[Aspuru-Guzik group list] [Aspuru-meetings-list] Seminar: The Data Driven Library of the Future, Christopher Erdmann, 11am, Monday, May 19, Phillips

by Gonzalo González Abad

Please join us for a seminar sponsored by the Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics Complete schedule of AMP Seminars at http://www.cfa.harvard.edu/amp/events.html 11:00am, Monday, May 19, Phillips Speaker: Chris Erdmann Title: "The Data Driven Library of the Future" Abstract: Libraries are changing, from being seen solely as repositories for journals and books, to engaged community centers which offer new and innovative services. For the past 3 to 4 years, the CfA Library has been no exception, exploring new data-centric services and uses of the library space. These new services and projects range from digital curation involving the NASA ADS and CERN to the exploration of interactive technologies in the library such as gesture-based interfaces to our collections. In this talk, I will describe the new services the library is offering and projects by our staff that are currently underway. I will also touch upon the challenges and opportunities we face as the CfA Library transitions to a 21st century library. _______________________________________________ Aspuru-meetings-list mailing list Aspuru-meetings-list(a)lists.fas.harvard.edu https://lists.fas.harvard.edu/mailman/listinfo/aspuru-meetings-list

9 years, 11 months

[Aspuru-Guzik group list] Excitonics Seminar: Thursday May 15, 2 PM

by Catherine M Bourgeois

9 years, 11 months

[Aspuru-Guzik group list] ITAMP topical lunch discussion: Friday, May 16 @ 12:00

by Mikhail Lemeshko

Dear Friends, On Friday, May 16, there will be an ITAMP topical lunch discussion. Time: 12:00-1:30 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. As always pizza will be served. Speaker: Prof. Kurt Jacobs (U Mass Boston) Title: Modulated Electromechanics: Large Enhancements of Nonlinearities Abstract: It is well-known that the nonlinear coupling between a mechanical oscillator and a superconducting oscillator or optical cavity can be used to generate a Kerr-nonlinearity for the cavity mode. We show that the strength of this Kerr-nonlinearity, as well as the effect of the photon-pressure force can be enormously increased by modulating the strength of the nonlinear coupling. We present an electromechanical circuit in which this enhancement can be readily realized. Looking forward to seeing you there, Misha Lemeshko -- 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

9 years, 11 months

[Aspuru-Guzik group list] [qip] seminar by Umesh Vazirani this Thursday at 11am in 6c-442

by aram harrow

Dear CTP/quanta, This Thursday, May 15, Umesh Vazirani will give a talk on finding ground states of 1-D quantum systems. The work builds on his recent breakthroughs in proving area laws in 1-D spin systems, and so is likely to be of interest to all of us who have been thinking about entanglement in ground states. title: A polynomial time algorithm for ground states of 1-D gapped local Hamiltonians abstract: The well-known heuristic DMRG (Density Matrix Renormalization Group) has been the method of choice for the practical solution of 1D systems since its introduction two decades ago by Steve White. However, the reasons for DMRG's success are not theoretically well understood and it is known to fail in certain cases. In this talk, I will describe the first polynomial time classical algorithm for finding ground states of 1D quantum systems described by gapped local Hamiltonians. The algorithm is based on a framework that combines recently discovered structural features of gapped 1D systems, convex programming, and a new and efficient construction of a class of operators called approximate ground state projections (AGSP). An AGSP-centric approach may help guide the search for algorithms for more general quantum systems, including for the central challenge of 2D systems, where even heuristic methods have had very limited success. Joint work with Zeph Landau and Thomas Vidick _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 11 months

[Aspuru-Guzik group list] Machine Learning Day

by Semion Saikin

Dear Group, If you haven't chance to register for the even, but still want to attend it just come in. They do have space and allow to get in. Semion ---------- Forwarded message ---------- From: Lauren Edwards <ledwards(a)microsoft.com> Date: Mon, May 12, 2014 at 8:19 AM Subject: Machine Learning Day 2014 To: Cc: ML Day 2014 <MLday14(a)microsoft.com> Thank you for registering to attend Machine Learning Day 2014 on Monday, May 13. Registration and a light breakfast will begin at 9:00 AM, and the opening remarks are at 9:50 AM. The full schedule is available on the website<https://urldefense.proofpoint.com/v1/url?u=http://research.microsoft.com/en…> . ML Day will be held at Microsoft Research New England, and arrival instructions by car or public transportation are available here<https://urldefense.proofpoint.com/v1/url?u=http://research.microsoft.com/en…><https://urldefense.proofpoint.com/v1/url?u=http://research.microsoft.com/en…>. Daily parking in the on-site garage is a flat rate of $27. Upon arrival, please check in with the security desk in the lobby and be prepared to show a photo ID. Security will direct you to the conference center on the first floor. *Please note, the event is over-subscribed, and registration is closed. Walk-ins will be able to view the workshop in an overflow room where we will be streaming the talks. If you are no longer able to attend, please let us know by replying to this email. * We look forward to seeing you at ML Day tomorrow. Regards, ML 2014 organizing committee [image: cid:image002.jpg@01CDA18D.97B53BB0] -- ******************************************** Semion K. Saikin, PhD Department of Chemistry and Chemical Biology Harvard University 12 Oxford Street, Cambridge, MA 02138 email: saykin(a)fas.harvard.edu phone: (619)212-6649 ********************************************

9 years, 11 months

[Aspuru-Guzik group list] [qip] Meeting with Robin Kothari

by Shelby Kimmel

Hello qip, As most of you know, Robin Kothari is visiting this week, and will be joining the group as a post-doc next year. Robin has done a lot of work on quantum algorithms and query complexity. If you would like to meet with him while he is here, please shoot me an e-mail, and I'll set up a time. If you would prefer to meet with him in a group, let me know and we can, for example, have a meeting with a group of grad students. Best, Shelby -- Shelby Kimmel PhD Candidate in Physics Massachusetts Institute of Technology www.mit.edu/~skimmel _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 11 months

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

aspuru-list May 2014