aspuru-list June 2016

aspuru-list@lists.fas.harvard.edu

20 participants
47 discussions

[Aspuru-Guzik Group List] Theochem organization meeting

by Jennifer Wei

Hi everyone, For all those interested in the theochem lecture series,we will be meeting soon with BU and MIT to decide who to invite for next year theochem series. The doodle poll link is here: http://doodle.com/poll/5wytd6h4ec4r9mz <http://doodle.com/poll/5wytd6h4ec4r9mzt> Graduate students are highly encouraged to attend; now is your chance to invite that professor that you've always wanted to meet and have dinner with, but never had a chance to before. For those who cannot make the meeting, but have suggestions for speakers, please let me know and I can bring them up at this meeting. Thanks! Jennifer

7 years, 11 months

[Aspuru-Guzik Group List] Group meeting, June 2, 2:30 PM, Div Room

by Ian Kivlichan

Hi all, Tomorrow we'll hear from Uri, who is visiting for a few weeks from the Technion (title and abstract below). Also, Borja and Steven will kick off the first "Great Ideas" seminar. Starting next week group meeting will begin at 3:30. Best, Ian ----------------- Speaker: Uri Peskin Title: Charge Transport Through Molecular Materials by Quantum Unfurling Abstract: I will start by reviewing some of the research going on in my group on quantum transport in nano-scale systems (single-molecule junctions, colloidal quantum dots, DNA). Then I will focus on the phenomenon of distance-independent charge transport rates in DNA, and its relation to a “quantum unfurling” mechanism of long range transport in molecular systems

7 years, 11 months

[Aspuru-Guzik Group List] June 2, 2016 - Special Seminar: Gregor Jotzu, ETH Zurich

by Ploucha, Clare Dolores

Hello, Below find notice of a talk that will be held tomorrow that may be of interest: Thursday, June 2, 2016 1:00 PM, Lyman 425 (Harvard) Gregor Jotzu, ETH Zürich (Esslinger group) "Floquet-engineering topological and spin-dependent bands with ultracold fermions" Periodically driven quantum systems, when observed on time-scales longer than one modulation period, can be described by effective Floquet Hamiltonians that show qualitatively new features. Using a magnetic field gradient, we apply an oscillating force to ultracold fermions in an optical lattice. The resulting effective energy bands then become spin dependent, allowing for a tunable ratio of the effective mass (including negative values) for each internal state, which can be observed directly. The regime where one spin experiences a flat band and is completely localized whilst the other remains itinerant also becomes accessible. In a honeycomb lattice, circular modulation of the entire lattice potential leads to the appearance of complex next-nearest neighbour tunnelling. This corresponds to a staggered magnetic flux in the lattice, allowing for the realisation of Haldane's model of a topological Chern insulator. The transition between trivial and topologically non-trivial insulating regimes manifests as a gapless spectrum. By simultaneously breaking time-reversal symmetry and the inversion symmetry of the lattice, the transition can be mapped out using Bloch-Zener oscillations. Furthermore, the non-zero overall Berry curvature leads to perpendicular drifts of an accelerated atomic cloud. A crucial question for the extension of Floquet-engineering to interacting systems is whether periodic modulation creates excessive heating in the system. We identify regimes where this heating is minimal which paves the way for studying the interplay of topology and interactions or exotic spin-models. Local spin correlations, which we can measure directly, may give new insights on the nature of the arising phases. -- 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

7 years, 11 months

[Aspuru-Guzik Group List] special seminar Peter Johnson

by Borja Peropadre

Hi friends, Peter Johnson, postdoc candidate for the quantum subgroup, is giving a talk today at 2.00pm in the division room. Please find title and abstract below. Best, Borja Title: Monogamy of entanglement, no cloning, and dissipative quantum state preparation Abstract: Monogamy of entanglement limits the distribution of quantum correlations in a many-body system. The no-cloning theorem states that quantum information cannot be copied. From quantum cryptography to quantum chemistry simulations, these principles govern our approach to quantum information processing and distinguish it from classical information processing. For the most part, mathematical investigations of the monogamy of entanglement and "no-cloning" have been independent. We make an in-depth comparison of these two principles, demonstrating their common origin and gaining insight from simple examples. Through this pursuit, we come upon an intriguing "parity difference" between causal and acausal quantum correlations (i.e. between quantum channels and states), which is not present in classical statistical mechanics. We then connect this investigation of quantum part-whole relationships to the task of dissipatively preparing a many-body entangled state using (quasi-)local resources. We determine conditions under which a target state is able to be the unique steady state of frustration-free quasi-local Liouvillian dynamics and discuss some illuminating examples. References: JPA 48, 035307 (2015) and QIC 16, 0657 (2016)

7 years, 11 months

[Aspuru-Guzik Group List] Special group meeting on Wednesday, June 1st: Dr. Libor Veis

by Teresa Tamayo

Hi everyone, The next *Wednesday, June 1st at 11:00 a.m.*, Dr. Libor Vies from Academy of Science of the Czech Republic, will give a talk in the division room. I attached the abstract of its talk. Have a great weekend, Tere

7 years, 11 months

[Aspuru-Guzik Group List] Online Energy Course

by Nicolas Sawaya

Hi Friends, I'm going to be a teaching assistant for a 10-week online HarvardX course this summer. (I'm more like a forum moderator, but they still call me a TA.) The course is called "Energy Within Environmental Constraints" and gives an excellent presentation of energy technology, energy economics, and environmental consequences. Here is the link (the course is free): https://www.edx.org/course/energy-within-environmental-constraints-harvardx… The required effort is "3-5 hours per week" according to the website. Knowing that many of us work on energy-related projects, I figured there would be some interested group members. Cheers, Nicolas

7 years, 11 months

[Aspuru-Guzik Group List] Fwd: Chem/materials informatics postdoc opening at IBM Almaden Research Center

by Alan Aspuru-Guzik

---------- Forwarded message ---------- From: *Richard L Martin* <rlmartin(a)us.ibm.com> Date: Tuesday, May 31, 2016 Subject: Chem/materials informatics postdoc opening at IBM Almaden Research Center To: Richard L Martin <rlmartin(a)us.ibm.com> Dear colleagues, There is currently a postdoc opportunity at IBM Almaden, that may be of interest to someone in your network. It is in 'IBM Research' proper, rather than the department I am in, which is 'IBM Watson'. Please see the notice below, and feel free to reach out to me or to the group leader, Jed Pitera, directly. *... there's a good chance I will have an opening to hire a postdoc in cheminformatics/materials informatics for my group here at Almaden (San Jose, CA USA). Ideally, I'm looking for someone with domain experience who also has good programming and software development skills. The person would be working as part of a team to build out tools for materials data extraction/NLP, inference, and reasoning but would also have some time to work on independent, publishable work.Our typical postdoc position is renewed yearly for up to 3 years and has a salary in the low six figures USD.If you know of any of your colleagues who are looking for such a position, please have them e-mail me (pitera(a)us.ibm.com <javascript:_e(%7B%7D,'cvml','pitera(a)us.ibm.com');>) directly.* Thanks, Richard -- 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

7 years, 11 months

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aspuru-list June 2016