aspuru-list November 2015

aspuru-list@lists.fas.harvard.edu

20 participants
51 discussions

[Aspuru-Guzik Group List] talk on quantum information processing, Sophia Economou

by Semion Saikin

Hi Guys, Here is the abstract of the talk that I plan to organize on Monday, Dec 7. Please join if you're interested in the topic. I will send the time and location later closer to that date. best, 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] Bomb threat at Science Center

by Alan Aspuru-Guzik

I recommend all of you to leave the Office until we know more. Whoever is hosting Leor Kronik: I won't be at the office sorry for canceling. Alan -- 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] [qip] Theory of Computation Seminar - Robin Kothari (next Tuesday)

by Cyril Stark

Dear All, Robin Kothari (CTP, MIT) is giving the next TOC seminar about joint work with Scott Aaronson and Shalev Ben-David (accepted to QIP 2016). Title: Separations in Query Complexity Using Cheat Sheets Time: 4:00 PM to 5:00 PM, November 17, refreshments at 3:45 PM Location: G449 Patil/Kiva Abstract: 2015 has been an exciting year for query complexity. I'll survey some of the breakthroughs made this year and then talk about some very recent work with my collaborators Scott Aaronson and Shalev Ben-David. We establish several new total function separations in query complexity. We show a power 2.5 separation between bounded-error randomized and quantum query complexity for a total Boolean function, refuting the widely believed conjecture that the best such separation could only be quadratic (from Grover’s algorithm). We also present a total function with a power 4 separation between quantum query complexity and approximate polynomial degree, showing severe limitations on the power of the polynomial method. Finally, we exhibit a total function with a quadratic gap between quantum query complexity and certificate complexity, which is optimal (up to log factors). These separations are shown using a new, general technique that we call the cheat sheet technique. The technique is based on a generic transformation that converts any (possibly partial) function into a new total function with desirable properties for showing separations. The framework also allows many known separations, including some recent breakthrough results of Ambainis et al., to be shown in a unified manner. 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

8 years, 6 months

[Aspuru-Guzik Group List] Ed's Send Off! Friday, November 13th at 4:30 PM

by Siria Serrano

Everyone, Join us in sending off Ed this Friday November 13th at 4:30 PM in our conference room (M137). We'll have beer and cider. Please stop by and wish him farewell! Best, Siria -- *Siria Serrano* *Faculty Assistant* *Aspuru-Guzik Group* *Harvard University **Department of Chemistry and Chemical Biology* *12 Oxford St. M 136* *Cambridge, MA 02138* *P:** (617) 496-1716 <%28617%29%20496-1716>** F: **617-496-9411 <617-496-9411>*

8 years, 6 months

[Aspuru-Guzik Group List] [qip] Vadym Kliuchnikov (MSR) visiting

by Aram Harrow

Dear quanta, Vadym Kliuchnikov is speaking Friday at 11am. (Note that this replaces the usual group meeting.) He is available for meetings tomorrow afternoon and most of Friday. If you want to meet him, you can get in touch with him at v.kliuchnikov(a)gmail.com. -aram _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

8 years, 6 months

[Aspuru-Guzik Group List] [qip] travel support for QIP deadline *today*

by Aram Harrow

If you are going to QIP, and you are a student or postdoc affiliated with MIT (or any other US university), you should apply for travel funding here. http://users.cms.caltech.edu/~vidick/qip16_travel.html On a related note, congratulations to Shalev, Matt, Henry, Jeongwan, Robin, Lior, Adam and Mohammad on their accepted talks! -aram _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

8 years, 6 months

[Aspuru-Guzik Group List] Last chance! Sign up for the group retreat in January :D

by Stéphanie Valleau

Hi everyone! This is the last "sign-up" recruiting email ;). If you're plans changed and you can now join the group outing this is your chance :). There are about 5 spots left so if you want to join just sign up on the doodle: http://doodle.com/poll/9kqtfy3a7ighs39x <http://doodle.com/poll/9kqtfy3a7ighs39xh328vu6y> Cheers, Stephanie

8 years, 6 months

[Aspuru-Guzik Group List] Group Access to NERSC's Cori Phase 1

by Sam Blau

Hey everyone, I wanted to let you all know that we have been given access to the first phase of Cori, NERSC's newest supercomputer. We are invited to run jobs on the system free of charge in exchange for providing feedback to NERSC staff about our experience. Additional information about Cori can be found here: https://www.nersc.gov/users/computational-systems/cori/ Please let me know if you plan to run jobs on Cori or if you have any additional questions about it. Sam

8 years, 6 months

[Aspuru-Guzik Group List] ITAMP lunch seminar - Pierre Christian , Harvard (11/13)

by Stefan Pabst

*ITAMP Topical Lunch Discussion* Date: Friday, November 13th 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:* Pierre Christian (Harvard) *Title:* Bringing the Shapiro delay to the 21st century: Testing the no-hair theorem with black hole-pulsar systems *Abstract:* The no-hair theorem theorem states that a black hole possesses only three parameters: its mass, angular momentum, and E&M charge. In general relativity (GR), the theorem was proven under the assumption of no naked singularity and no closed timelike loop. A test of the no-hair theorem would therefore be a direct probe of quantum gravity, or a laboratory to test whether causality or determinism breaks down under strong gravity. In this talk I will present a (hopefully) pedagogical introduction of the no-hair theorem based on the multipoles of a black hole's gravitational field. Using this formalism, I will show how one could test the no-hair theorem using an updated Shapiro delay in a black-hole pulsar system. We derived an expression for this updated Shapiro delay, up to second order in G/c^2, of pulsars orbiting close to "hairy" black holes of arbitrary spin. Our expression is completely analytical, and while the talk will be in the isotropic gauge, the conversion to the de Donder/harmonic gauge of PPN is readily available. Further, we did not restrict our "hairy" black holes to be Petrov Type D, and as such it can possess Hamilton-Jacobi equations that are not separable. The talk will aim to be pedagogical and jargons specific to this field will be explained. -- Stefan Pabst ITAMP Postdoc Alexander von Humboldt Fellow ITAMP, Harvard-Smithsonian Center for Astrophysics 60 Garden Street Cambridge, MA 02138, USA phone: +1-617-495-7239 fax: +1-617-496-7668 email: stefan.pabst(a)cfa.harvard.edu website: www.stefanpabst.name

8 years, 6 months

[Aspuru-Guzik Group List] TODAY-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

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aspuru-list November 2015