aspuru-list April 2014

aspuru-list@lists.fas.harvard.edu

35 participants
87 discussions

[Aspuru-Guzik group list] Special Quantum Optics Seminar - 4/16/2014

by Hamilton, Joan

2:00 p.m. Wednesday, April 16 Special Quantum Optics Seminar Lyman 425, Harvard University “Soft quantum matter for coherent coupling between electrons and photons” Sanli Faez Leiden Institute of Physics, The Netherlands Abstract: The strong coupling of quantum emitters to a single mode waveguide is a powerful alternative to cavity-QED for engineering complex quantum systems. In analogy, this approach has been named waveguide-QED. The main advantage of this approach is its scalability, i.e. to make a quantum network of many emitters via efficient coupling to a single guided mode, while keeping a high degree of control on individual nodes. The main experimental realizations so far have been based on trapped cold atoms inside or around nano-fibers and superconducting quantum networks. These advances have inspired many theoretical proposals in the last few years and have brought waveguide-QED to the forefront of studying many-body quantum physics in photonic systems. I report on the experimental realization of a new solid-state platform for waveguide-QED, which uses organic molecules as quantum emitters. I report on the successful retrieval of lifetime-limited molecular transitions in a nano-waveguide at temperatures around 2 K and the measurement of high visibility and background-free resonant fluorescence of a single molecule. Because of their small size and abundance, organic molecules can be embedded in these devices at the high concentrations that are essential for nanoscopy applications. I will discuss how to use these organic molecules as nanoprobes for detection of single conduction electrons in electronic devices such as molecule-nanoparticle networks. I will also present a new proposal, based on this platform, for coherent coupling between superconducting qubits and visible photons, which is essential for transferring their quantum states over long distances.

10 years

[Aspuru-Guzik group list] Welcome New Faculty Visitor - Hans P. Lüthi

by Marlon Cummings

Dear Friends: Starting on Monday for a period of one month, Professor Hans P. Lüthi will be visiting our lab. He will be seated in Sam's area (next to Semion). Here is a quick bio: Hans P. Lüthi obtained his MSc and PhD degrees in chemistry from ETH Zürich and the University of Zürich. After post-doctoral studies at the IBM Almaden Research Center in San Jose, California, and a visiting professorship at Minnesota Supercomputer Institute (MSI) in Minneapolis, Minnesota, he returned to ETH Zurich in 1987, where he was involved in the build-up of the Swiss Supercomputing infrastructure. Lüthi’s research interests are in the electronic structure and properties of large molecules as well as in high performance computing. He made major contributions to the implementation of the Hartree-Fock method (direct methods, parallel computing, distributed computing) as well as to the understanding of chemical phenomena (prediction of the stability of the “buckyball” (1987), the design of molecular switches (1997), and the reactivity of hypervalent iodine compounds (2007)). As early as in 1991, Lüthi and coworkers of the MSI were able to distribute large electronic structure computations over trans-continental networks of supercomputers. Still interested in delocalized computing, his focus has shifted towards the processing of (distributed) information obtained from electronic structure calculations. Lüthi is the director of the ETH Zurich “Competence Center for Computational Chemistry”, and a senior lecturer at the ETH Zurich Department of Chemistry. He was the chairman of the management committee of a European project on Grid computing (COST D37), and is currently on the Board of Directors of the Swiss Chemical Society. ---------------------- Please stop by Monday to say hello. Have a nice weekend. Marlon.

10 years

[Aspuru-Guzik group list] scanner security reminder

by Joey Goodknight

Hello Everyone, Just a reminder that the scanner in the big office, by default, send e-mails to aspuruprinter(a)gmail.com with your document in them in addition to the other addresses you check. You have to actively un-check that address to keep your document from going there. In periodically go and delete all the e-mails on that account (I just did) but if you're scanning something extra sensitive like tax or immigration forms, it's something to be aware of. Have a great weekend! -Joey

10 years

[Aspuru-Guzik group list] Machine Learning Day 2014

by McClean, Jarrod

For all the Machine Learning enthusiasts, I’ve heard it’s a good time plus local and free: Begin forwarded message: From: Sham Kakade <skakade(a)microsoft.com<mailto:skakade@microsoft.com>> Subject: Machine Learning Day 2014 Date: April 8, 2014 at 11:59:40 AM EDT To: Sham Kakade <skakade(a)microsoft.com<mailto:skakade@microsoft.com>> The third New England Machine Learning Day<https://urldefense.proofpoint.com/v1/url?u=http://research.microsoft.com/en…> (NEML) will be May 13th, 2014, 9:50am-5pm, at Microsoft Research New England in Kendall Square. Like previous years, it will bring together local researchers in machine learning and related fields, as well as those who use ML in applications. There will be a lively poster session during lunch. To submit a poster, please see the poster instructions<https://urldefense.proofpoint.com/v1/url?u=http://research.microsoft.com/en…>; this will involve submitting a brief abstract describing the project toMLposters14(a)microsoft.com<mailto:MLposters14%40microsoft.com?subject=NEML%202014%20Poster%20Session> by April 25th. Please also encourage relevant students to attend and submit posters. Schedule: 9:50 - 10:00 Opening remarks 10:00 - 10:30 Polina Golland, (MIT) 10:35 - 11:05 David Cox (Harvard) 11:10 - 11:40 Adam Kalai (MSR) 11:40 - 1:45 Lunch and posters 1:45 - 2:15 Michael Littman (Brown) 2:20 - 2:50 Venkatesh Saligrama (BU) 2:50 - 3:20 Coffee break 3:20 - 3:50 Carla Brodley (Tufts) 3:55 - 4:25 Ben Marlin (UMass) 4:30 - 5:00 Josh Tenenbaum (MIT) If you expect to attend (to plan for food and seating), please RSVP on this registration link<https://urldefense.proofpoint.com/v1/url?u=http://vp-nri.com/take/?i%3D1727…> with your name and affiliation, ideally by May 6th. If registration exceeds capacity, priority will be given to students, faculty, and those who have registered earliest. For more information/updates, see the website: http://research.microsoft.com/en-us/events/neml2014/<https://urldefense.proofpoint.com/v1/url?u=http://research.microsoft.com/en…>. Please help us publicize the event by forwarding to appropriate mailing lists. Hope to see you there! The ML day organizers, Ryan Adams, Sham Kakade, Lorenzo Rosasco, and Stefanie Tellex *NEML is an annual event. The steering committee that selects the organizers consists of Sham Kakade, Adam Kalai, and Josh Tenenbaum. Hospitality Notice for University and Government Employees: Microsoft Research is providing hospitality at this event. Please consult with your institution to determine whether you can accept meals and other hospitality under your institution’s ethics rules and any other laws that might apply. By accepting our invitation, you confirm that this invitation is compliant with your institution’s policies.

10 years

[Aspuru-Guzik group list] Excitonics Seminar - Paul McEuen - April 17, 3 pm, 36-428

by Catherine M Bourgeois

Please post and forward to your groups ___________________________________ EXCITONICS SEMINAR SERIES [http://www.rle.mit.edu/excitonics/images/mceuen_001.jpg] Paul McEuen Department of Physics Cornell University Kavli Institute at Cornell for Nanoscale Science Light and Fast: Probing Carriers and Vibrations in 1D and 2D Materials Thursday, April 17, 2014 RLE Conference Room - 36-428 3:00 - 4:00pm Abstract: Carbon nanotubes and 2D atomic membrane materials cut across many disciplines with their remarkable optical, thermal, mechanical, and electronic properties. In this talk we will examine cases when a combination of properties, e.g. optical and mechanical, are simultaneously important. First, we will discuss ultrafast optoelectronic measurements of graphene p-n junctions that probe the fundamental thermal relaxation processes for excited carriers. Next, we will discuss experiments where circularly polarized light creates a valley polarization in an MoS2 monolayer, leading to a Hall effect in the absence of a magnetic field. Finally, we will discuss experiments where individual carbon nanotubes are picked up with micron sized tweezers. These tweezers double as electrical probes, allowing us to simultaneously study the optical, electronic, thermal, and vibrational properties of nanotubes as they are strained or buckled. Bio Paul L. McEuen is the Goldwin Smith Professor of Physics at Cornell University. He directs the Laboratory of Atomic and Solid State Physics and the Kavli Institute at Cornell for Nanoscale Science. His research focuses on nanoscale electronic, optical, and mechanical properties of graphene, nanotubes, and related materials. He received his B.S. degree in Engineering Physics from the University of Oklahoma in 1985 and his Ph.D. in Applied Physics from Yale University in 1991. He joined the faculty at UC-Berkeley in 1992 before coming to Cornell in 2001. Awards and honors include a Packard Foundation Fellowship, a National Young Investigator Fellowship, and the Agilent Europhysics Prize. He is a fellow of the American Physical Society and a member of the National Academy of Sciences. He is also a novelist, and his scientific thriller SPIRAL was named the debut thriller of the year by the International Thriller Writers Association. Light refreshement will be served 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

10 years

[Aspuru-Guzik group list] [IACS-events] REMINDER: IACS Seminar featuring Hadley Wickham (RStudio and Rice University) TOMORROW Friday, 4/11

by Baker, Natasha

****NEW LOCATION**** Date: Friday, April 11, 2014 Location: Northwest Building Room B-101, 52 Oxford Street Speaker: Hadley Wickham, Chief Scientist of RStudio; Assistant Professor of Statistics, Rice University Time: Informal lunch with speaker, 12:30pm. Talk, 1:00pm Title: Expressing Yourself in R Abstract: There are three main time sinks in any data analysis: 1. Figuring out what you want to do. 2. Turning a vague goal into a precise set of tasks (i.e. programming). 3. Actually crunching the numbers. A well-designed domain specific language (or DSL) tightly coupled to the problem domain can make all three pieces faster. In this talk, I’ll discuss two DSLs built in R: ggvis for visualisation and dplyr for data manipulation. These build on my previous packages ggplot2 and plyr, improving both expressivity and speed. Data visualisation and manipulation are key parts of data analysis. ggvis makes it easy to declaratively describe interactive web graphics. It combines a declarative syntax based on ggplot2 with shiny’s reactive programming model and vega’s declarative JS rendering system. dplyr implements the most important verbs of data manipulation in a datastore-agnostic fashion, so you can think about and compute with your data in the same way regardless of whether you’re working with a local in-memory data frame or a remote on-disk database. Co-sponsored by the Harvard School of Public Health (Biostatistics Dept). gCal<https://www.google.com/calendar/render?cid=http://www.seas.harvard.edu/cale…> iCal<UrlBlockedError.aspx> Speaker bio: Hadley Wickham is Chief Scientist at RStudio and Adjunct Professor of Statistics at Rice University. He's interested in building tools (computational and cognitive) that make data preparation, manipulation, visualization and analysis easier. He's developed over 30 R packages, for data analysis (ggplot2, plyr, reshape), making frustrating parts of R easier to use (lubridate for dates, stringr for strings, httr for accessing web APIs), and for streamlining the R package development process (roxygen2, testthat, devtools, lineprof, staticdocs). *********************** UPCOMING SEMINARS 4/25 Spiros Mancoridis (Drexel University)--- Location: Maxwell Dworkin G115, 33 Oxford Street (Cambridge) Please 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

10 years

[Aspuru-Guzik group list] ITAMP topical lunch discussion: Friday, April 11 @ 12:00

by tony.lee＠cfa.harvard.edu

ITAMP Topical Lunch Discussion Date: FRIDAY, April 11 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. Ksenia Bravaya (Boston University) *Title:* Electronic structure theory for autoionizing electronic states: challenges and prerequisites. *Abstract:* Autoionizing electronic states are ubiquitous in highly energetic environment; they also play an important role in the photophysics of anions (including biochromophores) and in the condensed phase processes, e.g. DNA damage by secondary electrons. Accurate prediction of the lifetimes of autoionizing states is crucial for understanding the dynamics and chemical properties of these systems. I will discuss a new set of methods we developed to extend the capabilities of conventional high-level electronic structure methods to the description of resonance energies and life-times. The methods are based on combining accurate equation-of-motion coupled-cluster (EOM-CC) approaches with complex-scaling and complex-absorbing potential techniques. The latter two approaches allow one to isolate a resonance as a single L^2-inetegrable eigenstate of the modified non-Hermitian Hamiltonian. Real and imaginary parts of the corresponding complex eigenvalue give resonance position and width, respectively. I will show results of some benchmark calculations, including atoms and small molecules, discuss the importance of the electron correlation in description of Feshbach and shape resonances, and formulate current challenges for the theory and potential solutions.

10 years

[Aspuru-Guzik group list] Divestment

by Sawaya, Nicolas

For those who are interested (maybe those in the group working on energy problems), this was published today: http://www.harvardfacultydivest.com/ -nicolas

10 years

[Aspuru-Guzik group list] [qip] Friday the 11th

by Edward Farhi

Hi Quanta We will meet on Friday the 11th at 11 in 6-310. Keith Lee is visiting and will be giving a talk at 1:30. If you have something you would like to discuss at the group meeting please bring it with you. Best, 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

10 years

[Aspuru-Guzik group list] [qip] conference of possible interest

by Edward Farhi

=================== Announcement: We are pleased to announce that registration is now open for the Third Workshop in Adiabatic Quantum Computing. This workshop is hosted and organized by the USC-Lockheed Martin Quantum Computation Center (QCC) and the USC Center for Quantum Information Science & Technology (CQIST). Adiabatic Quantum Computing (AQC) promises to be robust to many noise sources that cause ordinary quantum circuits to fail, including environmental decoherence and imperfect control. While any quantum algorithm can be run on a universal adiabatic quantum computer in principle, combinatorial optimization problems appear to be the most natural for near-term devices. Understanding the landscape of AQC architectures and algorithms, and methods for realising them, continues to be an active and vibrant research area. The Third International Workshop on Adiabatic Quantum Computing (AQC 2014) brings together researchers from different communities to explore this computational paradigm. The Workshop is a sequel to AQC 2012 (Albuquerque) and AQC 2013 (London). Please visit the workshop website to register. http://www.isi.edu/events/aqc2014/home A small number of contributed talks will be selected for presentation by the organizing committee. Anyone can present a poster. Dates: Reception: June 10 Workshop: Wed.-Sat., June 11-14, 2014 Location: University of Southern California, Davidson Conference Center, 3415 South Figueroa Street, Los Angeles, CA 90089 _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

10 years

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aspuru-list April 2014