aspuru-list November 2015

aspuru-list@lists.fas.harvard.edu

20 participants
51 discussions

[Aspuru-Guzik Group List] No group meeting tomorrow

by Ian Kivlichan

Hi all, Tomorrow we have no group meeting due to Veterans Day. See you next week! The Group Meeting Schedule Google Doc is here <https://docs.google.com/spreadsheets/d/1LioqdopHr5ZAmn0GaCQwLUTYoU4ZJuvfrMY…> for reference. Best, Ian

8 years, 6 months

[Aspuru-Guzik Group List] Prof Leeor Kronik Visit Next Week

by Romero Fontalvo, Jhonathan

Hi Friends, Professor Leeor Kronik from the Weizmann Institute of Science in Israel will be visiting our group next week as part of the Theochem lecture series. We have many open slots for both students and postdocs to meet with him on Monday, November 16th, 2015 as well as spots for both lunch and dinner. Let me know if you want a chance to meet with him. Professor Kronik specializes on studying material properties using density functional theory. His research focuses on organic electronic materials (with an emphasis on organic/inorganic interfaces) as well as supra-molecular materials. Check the abstract of his talk below, that will take place on Wednesday, November 18th at MIT in room 4-163 at 4pm (Time will be confirmed later). Best, Jhonathan *Theoretical spectroscopy using density functional theory: new ideas for long-standing problems * Leeor Kronik Weizmann Institute of Science, Rehovoth 76100, Israel Department of Materials and Interfaces, E-mail: leeor.kronik(a)weizmann.ac.il *Abstract* Accurate prediction of the electronic structure and optical properties is essential for rational design of materials for novel (opto)electronic applications. Quantities of interest include, e.g., the bandgap, band dispersion and band width, optical absorption, exciton binding energies, and more. Preferably, we would like to predict such quantities using density functional theory (DFT), because the relative computational simplicity afforded by DFT allows us to attack realistic problems. Unfortunately, despite many other successes, DFT has traditionally struggled with prediction of the above quantities. Specifically, research has been fraught with very difficult questions as to the extent to which spectroscopic conclusions can be drawn from DFT even in principle, followed by serious concerns as to the reliability of typical DFT approximations in practice. In this lecture, I will start with a tutorial overview on DFT. I will then focus on new formal and practical approaches which offer fresh answers to the above long-standing questions. In particular, I will show that DFT can, in many cases, mimic successfully the quasi-particle picture of many-body theory, allowing for quantitative calculations of both single- and two-particle excitations. I will show how this is achieved for finite systems, present initial generalizations to solids, and discuss limitations and remaining challenges. -- Jonathan Romero Fontalvo *Ph.D. Student in Chemical Physics* *Harvard University* Website: https://sites.google.com/site/jonathanromeroswebsite/

8 years, 6 months

[Aspuru-Guzik Group List] Fwd: [qip] Lecture Series at Harvard

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 ---------- Forwarded message ---------- From: Aram Harrow <aram(a)mit.edu> Date: Tue, Nov 10, 2015 at 11:33 AM Subject: [qip] Lecture Series at Harvard To: qip(a)mit.edu Dear quanta, See below for a series of talks on quantum information from a field-theory perspective. Speaker: Daniel Harlow Title: Fun with Quantum Information Theory Summary: There has been a lot of recent interest in quantum information theory from high-energy and condensed matter physicists. In these four lectures I will introduce several of the main tools that have been used in these recent applications. Rather than explain the applications in detail however, I will try to present the original information theoretic motivations for the development of these tools, reserving the applications for comments as we go along. The main topics to be discussed are the definition and transmission of quantum information, the properties and operational meaning of von Neumann entropy, random states and Page's theorem, quantum complexity theory, and quantum error correction. Dates: November 9, 23, 30, and December 7th (all Mondays) Time and Location: 11am, Jefferson 356, Harvard _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

8 years, 6 months

[Aspuru-Guzik Group List] [qip] Ke Li (IBM/MIT) is visiting us

by Cyril Stark

Dear All, Ke Li (IBM and MIT) is visiting us this Thursday and Friday. He is going to give the Friday seminar (see below). Please let me know if you would like to meet Ke. Best, cyril -- Title: Discriminating quantum states: the multiple Chernoff distance Place: 6C-442 Time: 1:30 (Nov 13) Abstract: Suppose we are given n copies of one of the quantum states {rho_1,..., rho_r}, with an arbitrary prior distribution that is independent of n. The multiple hypothesis testing problem concerns the minimal average error probability P_e in detecting the true state. It is known that P_e~exp(-En) decays exponentially to zero. However, this error exponent E is generally unknown, except for the case r=2. In this talk, I will give a solution to the problem of identifying the above error exponent, by proving Nussbaum and Szkola's conjecture that E=min_{i\neq j} C(rho_i, rho_j). The right-hand side of this equality is called the multiple quantum Chernoff distance, and C(rho_i, rho_j):=max_{0 \leq s \leq 1} {-log Tr rho_i^s rho_j^(1-s)} has been previously identified as the optimal error exponent for testing two hypotheses, rho_i versus rho_j. The main ingredient of our proof is a new upper bound for the average error probability, for testing an ensemble of finite-dimensional, but otherwise general, quantum states. This upper bound, up to a states-dependent factor, matches the multiple-state generalization of Nussbaum and Szkola's lower bound. Specialized to the case r=2, we give an alternative proof to the achievability of the binary-hypothesis Chernoff distance, which was originally proved by Audenaert et al. -- 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

8 years, 6 months

[Aspuru-Guzik Group List] Excitonics/Perovskite Seminar: Riccardo Comin -TUESDAY Nov 10 -4:30-rm:4-331

by Catherine M Bourgeois

Please post and forward to your group(s). CENTER FOR EXCITONICS SEMINAR SERIES Fundamental studies and new applications of hybrid lead halide perovskites* November 10, 2015 at 4:30pm/Duboc Room: 4-331** Riccardo Comin University of Toronto [comin-1] In recent years light-harvesting devices based on a new class of organometallic lead iodide perovskites (CH3NH3PbI3) were demonstrated to exhibit power conversion efficiencies beyond 20%, rapidly approaching the performance of commercial silicon-based modules. Besides photovoltaics, important milestones and breakthroughs were also achieved in other optoelectronic contexts, such as light emission, lasing, light sensing, and photocatalysis. In this talk I will first discuss a series of fundamental studies of single-crystalline perovskite materials, including investigations of their electronic structure, carrier dynamics, and photophysical properties. I will then present some recent developments of innovative perovskite-based composite materials and hierarchical structures, and show how they can be tailored and functionalized for specific optoelectronic applications, and in particular for light emission technologies Riccardo Comin received his PhD degree from the University of British Columbia in 2013 under the supervision of Prof. Andrea Damascelli. He has investigated and discovered new electronic properties of several oxide-based quantum materials (cuprates, ruthenates, iridates), using a variety of techniques, in primis angle-resolved photoemission and various type of x-ray spectroscopies. He is currently a NSERC post-doctoral fellow in the the Sargent group at the University of Toronto exploring the link between the fundamental electronic properties and the functionality of novel organometallic halide perovskites for photovoltaic applications. *This talk is part of the Perovskites Seminar Series organized by Sam Stranks and sponsored by the Center for Excitonics. For more info contact Sam: stranks(a)mit.edu<mailto:stranks@mit.edu> **NOTE ROOM LOCATION 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, 6 months

[Aspuru-Guzik Group List] Subgroup talk on quantum information processing

by Semion Saikin

Hi Guys, One of my colleagues, Dr. Sophia Economou, will be visiting me on Monday, Dec 7, and I would like to organize a talk about her research in quantum information processing for the group members who are interested in this field. Sophia is a theoretician, she just received an Associate Professor position in the Dept. of Physics at Virginia Tech. Before she was a staff scientist in Naval Research Laboratory, where she worked on quantum computation for about 5-8 year. I include here several of her papers and will send the abstract and time for the talk a bit later. Please let me know if you're interested to talk with her in person. Sincerely, Semion -- ******************************************** 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 ********************************************

8 years, 6 months

[Aspuru-Guzik Group List] Fwd: Faculty position in Computational and theoretic chemistry at University of Hong Kong

by Alan Aspuru-Guzik

---------- Forwarded message ---------- From: *Guanhua Chen* <ghc.hku(a)gmail.com> Date: Sunday, November 8, 2015 Subject: Faculty position in Computational and theoretic chemistry at University of Hong Kong To: theoretical-chemist(a)yangtze.hku.hk Dear Colleagues: Attached please find an advertisement for two faculty positions in Department of Chemistry, University of Hong Kong, one of which is for a computational and theoretical chemist. Please encourage suitable candidates to apply. Thanks a lot! Regards, Guanhua CHEN Professor and Head Department of Chemistry University of Hong Kong -- 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, 6 months

[Aspuru-Guzik Group List] Fwd: FW: Announcement of Availability

by Alan Aspuru-Guzik

Excellent news ! ---------- Forwarded message ---------- From: *Dave Wecker* <Dave.Wecker(a)microsoft.com> Date: Friday, November 6, 2015 Subject: FW: Announcement of Availability To: Alan Geller <Alan.Geller(a)microsoft.com> Yesterday, we announced public availability of our Language-Integrated Quantum Operations (LIQ) simulator on our listserv mailing list (see below). We are sending this mail to colleagues that we’ve worked with in the past who might be interested. Please feel free to forward this e-mail to others. *All the Best, _* Dave Wecker, Microsoft Research/QuArC *From:* Quantum Liquid Academic Outreach [mailto: LIQUID-NEWS(a)LISTS.RESEARCH.MICROSOFT.COM <javascript:_e(%7B%7D,'cvml','LIQUID-NEWS(a)LISTS.RESEARCH.MICROSOFT.COM');>] *On Behalf Of *Alan Geller *Sent:* Thursday, November 5, 2015 4:41 PM *To:* LIQUID-NEWS(a)LISTS.RESEARCH.MICROSOFT.COM <javascript:_e(%7B%7D,'cvml','LIQUID-NEWS(a)LISTS.RESEARCH.MICROSOFT.COM');> *Subject:* Announcement of Availability Dear Colleagues: We are pleased to announce the public release of the Language-Integrated Quantum Operations (LIQ) simulator. This release is targeted for academic use and may be freely downloaded and run in any Windows environment. The full release with documentation and a Quick Start guide is available on GitHub at: https://github.com/msr-quarc/Liquid <https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fgithub.com…>. An overview of the simulator may be found on the arXiv at: http://arxiv.org/abs/1402.4467 <https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2farxiv.org%2…>. We will be giving workshops on LIQ at QIP, SquInT, and other locations around the world, starting in January. Please forward this to anyone you think might be interested. If they would like announcements about workshops, events, and releases, they should send an e-mail to LISTSERV(a)lists.research.microsoft.com <javascript:_e(%7B%7D,'cvml','LISTSERV(a)lists.research.microsoft.com');> with subject “Subscribe” and a one-line body reading SUB Liquid-news *FirstName* *LastName* If they prefer to subscribe anonymously, they may instead send the following message: SUB Liquid-news anonymous We look forward to bringing state-of-the-art quantum circuit simulation to all of academia. Thanks, Alan Geller Quantum Architectures and Computation Group Microsoft Research ------------------------------ To unsubscribe from the LIQUID-NEWS list, click the following link: http://lists.research.microsoft.com/scripts/wa.exe?TICKET=NzM1OTM3IERhdmUuV… <https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2flists.resea…> Please see our Privacy Statement: http://research.microsoft.com/en-us/about/listserverprivacy.aspx -- 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, 6 months

[Aspuru-Guzik Group List] November 11, 2015-Prof. Jack Harris-HQOC/ITAMP Joint Quantum Sciences Seminar

by Ploucha, Clare

HQOC/ITAMP Joint Quantum Sciences Seminar Wednesday, November 11 , 2015 4:00 PM, Jefferson 250 Prof. Jack Harris, Yale "Observing quantum effects in the motion of a millimeter-sized object" A major challenge in physics is to understand how the classical behavior of macroscopic objects emerges from laws that are fundamentally quantum mechanical. The field of optomechanics seeks to address this issue by studying quantum effects in the motion of macroscopic objects that are coupled to individual photons. In the past few years, experiments have demonstrated a number of quantum effects n these devices, including ground-state cooling, entanglement, and the quantum back-action of displacement measurements. I will give an overview of our group's work on these topics. I will also describe our recent work on optomechanical effects in superfluid helium devices. Garrett Drayna, Doyle Group "Microwave spectroscopy of buffer-gas cooled large molecules" Buffer-gas cooled gases of large organic molecules are an exciting system for new studies of physics and chemistry. Our team has been investigating the use of microwave spectroscopy in a buffer-gas cell to study a diverse set of physical and chemical systems, ranging from work towards precision measurement of parity violation in chiral molecules, to mixture analysis of complex solution which could one day detect cancer in human breath. One particular experiment I will describe is a new method for exploring the conformers of organic molecules. Conformers, distinct geometric arrangements of a chemical species, are key to understanding the chemical and biological function of many molecules such as amino acids and sugars. We used microwave spectroscopy to probe the cooling of conformers in the buffer-gas. This novel method allows direct observation of gas-phase conformational relaxation, a process used to infer chemical behavior in many systems. Student Presentation from 4:00-4:10 PM Refreshments Served from 4:10-4:30 PM Guest Presentation from 4:30-6:00 PM -- Clare Ploucha Faculty Assistant to Professors Lukin & Greiner and their labs Department of Physics 17 Oxford St., Lyman 324A Cambridge, MA 02138 P. (617) 496-2544

8 years, 6 months

[Aspuru-Guzik Group List] [qip] Fwd: Quantum information positions at JILA and CU Boulder

by aram harrow

Graduate and Postdoctoral positions in quantum information science at JILA and CU Boulder We are seeking exceptional candidates for postdoctoral and graduate student positions in theoretical quantum information and computer science, beginning in Fall 2016 or thereafter. Successful candidates will join the new group of Graeme Smith (https://sites.google.com/site/gsbsmith/) and be members of both JILA and the Physics department at CU Boulder. In addition to quantum information, there are many researchers at JILA working on related topics such as precision measurement, AMO physics, and nanoscience. The ideal candidates will be able to interact fruitfully with a variety of other JILA members, as well as members of the recently established Center for the Theory of Quantum Matter. Postdoctoral candidates should have record of creative accomplishments in quantum information or allied areas. Applications should include a CV, statement of research interests, 3 letters of recommendation, as well as a completed application form found at http://jila.colorado.edu/students-postdocs/postdocs . Candidates should list Graeme Smith among the JILA fellows who should be alerted to their application. Applications can be submitted according to the instructions at the website above. Postdoctoral applications received by December 5, 2015 will receive full consideration. Potential graduate students interested in working on quantum information and computing are encouraged to apply to the CU Boulder physics department. Further information about the department and how to apply can be found at http://phys.colorado.edu/prospective-students/applying-graduate-program For further information about these positions, please contact Graeme Smith ( gsbsmith(a)gmail.com). _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

8 years, 6 months

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aspuru-list November 2015