aspuru-list July 2014

aspuru-list@lists.fas.harvard.edu

34 participants
56 discussions

[Aspuru-Guzik group list] [qip] Special Seminar Wednesday - Renato Renner

by Shelby Kimmel

Hi Everyone, This week we have a special quantum information seminar given by Renato Renner. He will be speaking Wednesday April 2 at 4:30 (note time change from standard seminar!) in room 6C-442. Title and and abstract are below. Hope to see you there. Best, Shelby Title: Reliable Quantum State Tomography Abstract: Quantum state tomography is the task of estimating the state of a quantum system using measurements. Typically, one is interested in the (unknown) state generated during an experiment which can be repeated arbitrarily often in principle. However, the number of actual runs of the experiment, from which data is collected, is always finite (and often small). As pointed out recently, this may lead to unjustified (or even wrong) claims when employing standard statistical tools without care. In this talk, I will present a method for obtaining reliable estimates from finite tomographic data. Specifically, the method allows the derivation of confidence regions, i.e., subsets of the state space in which the unknown state is contained with probability almost one. This is joint work with Matthias Christandl, see also arXiv:1108.5329. -- 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, 6 months

[Aspuru-Guzik group list] Fwd: Faculty opening in theoretical and computational chemistry at UB at the University at Buffalo

by Alan Aspuru-Guzik

---------- Forwarded message ---------- From: *Hachmann, Johannes* <hachmann(a)buffalo.edu> Date: Thursday, July 31, 2014 Subject: Faculty opening in theoretical and computational chemistry at UB at the University at Buffalo To: "Hachmann, Johannes" <hachmann(a)buffalo.edu> Dear colleagues and friends, The UB Department of Chemistry is conducting a search for an additional faculty position in theoretical and computational chemistry at the tenure-track Assistant Professor level. Please find the detailed listing here: http://www.ubjobs.buffalo.edu/applicants/Central?quickFind=57304 It makes me very happy that our community is going strong at Buffalo and I hope that you will encourage suitable candidates in your groups to apply. Best wishes from Upstate New York, Johannes ----------------------------------------------------------- Dr. Johannes Hachmann Assistant Professor University at Buffalo The State University of New York Department of Chemical and Biological Engineering NYS Center of Excellence in Materials Informatics 612 Furnas Hall Buffalo, NY 14260 www.cbe.buffalo.edu/hachmann http://hachmannlab.cbe.buffalo.edu ----------------------------------------------------------- -- 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

9 years, 8 months

[Aspuru-Guzik group list] Fwd: [account-managers] 2015 allocation request form will be available August 13

by Alan Aspuru-Guzik

Dear group members, As far as I remember, Sule Atahan was our last NERSC account manager. I think we need a successor. Anybody interested? If not I will designate some one :) We need to start applying for more computer time. Given all the computer time needs of the group, I hope more of you are now using the XSEDE resource that Suleyman graciously is working on, and that one of you steps up the plate to act as our NERSC account manager. We could ask for more CPU time here to complement our usage needs. Best, 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 ---------- Forwarded message ---------- From: Francesca Verdier <fverdier(a)lbl.gov> Date: Thu, Jul 31, 2014 at 8:28 AM Subject: [account-managers] 2015 allocation request form will be available August 13 To: account-managers(a)nersc.gov Dear NERSC PIs and Proxies, The process of renewing your 2014 NERSC projects for 2015, as well as submitting brand new requests for 2015, will start on August 13. I will send further instructions at that time. 2015 requests will be due the night of Monday, September 22. Sincerely, Francesca Verdier email: fverdier(a)lbl.gov NERSC Allocations Manager phone: 510-486-7193 _______________________________________________ account-managers mailing list account-managers(a)nersc.gov

9 years, 8 months

[Aspuru-Guzik group list] [qip] Friday the 1st

by Edward Farhi

Hi Quanta We will meet on Friday August 1 at 11:00 in 6-310. I am hoping that we will be joined by Frank Verstraete, Uwe Wiese and Hans Briegel all three of whom have indicated that they would like to visit as their conference ends tonight. So see you there. 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

9 years, 8 months

[Aspuru-Guzik group list] [qip] Seminar :: Prof. Michael Biercuk :: TOMORROW, July 31st 4:30pm :: 36-428

by Paola Cappellaro

** REMINDER ** Special Seminar ** TOMORROW :: July 31st :: 4:30pm :: Haus Room 36-428 (MIT) == Control in Quantum Coherent Systems == Prof. Michael Biercuk, School of Physics, University of Sidney == Abstract == Tremendous research activity worldwide has focused on attempting to harness the exotic properties of quantum physics for new applications in metrology, computation, and communications - a push to develop engineered quantum systems. Underlying any such capability is the need to exert control over a chosen quantum system in order to coax it into performing useful tasks. In this talk we describe the physics and engineering challenges faced in controlling quantum coherent systems. We introduce and validate an efficient transfer-function-based framework for predicting quantum dynamics [1] through experiments using trapped Ytterbium ions [2]. This framework reveals novel insights into the physics underlying the performance of a wide variety of NMR and quantum-information inspired control techniques. We then demonstrate how combining this new understanding of controlled quantum dynamics with functional analysis allows us to address challenging problems ranging from quantum computation and simulation [3-4] to precision frequency metrology [5]. [1] New Journal of Physics 15, 095004 (2013). Phys. Rev. Lett. 109, 020501 (2012). [2] Phys. Rev. A. 89, 042329 (2014). arXiv:1404.0820 (2014). [3] Nat. Comms. 4, 2045 (2013). [4] arXiv:1309.6736 (2013). Accepted to New J. Phys. Nature 484, 489 (2012). [5] arXiv:1407.3902 (2014) -- Paola Cappellaro Esther and Harold Edgerton Associate Professor Nuclear Science and Engineering Dept. Massachusetts Institute of Technology http://qeg.mit.edu/ Quantum Engineering Group _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

9 years, 8 months

[Aspuru-Guzik group list] Marlon Away

by Marlon Cummings

Dear Group: I'll be away on vacation with limited access to email beginning this afternoon. I will be returning on August 6th. Please touch base with Cynthia if you require any assistance. Thanks, Marlon. ------------------ Marlon G. Cummings Lab Manager, Aspuru-Guzik Group Mallinckrodt M112 Department of Chemistry and Chemical Biology Harvard University 12 Oxford Street Cambridge, MA 02138 617-496-9964 617-496-9411 (fax) http://aspuru.chem.harvard.edu/

9 years, 8 months

[Aspuru-Guzik group list] Aspuru Group Meeting Thursday July 31st at 2.30 pm in Converse 102

by Felipe Herrera Urbina

* Note the unusual location for our group meeting. The Division Room is not available tomorrow. Hi everyone, This week Dr. Hugo Cable who is visiting from Bristol will tell us about his recent work on the boundary between classical and quantum computation. Please see the title and abstract of his talk below. See you there, Felipe Herrera ****** *Title*: SIMULATING CONCORDANT COMPUTATION *Abstract:* Quantum computation enables algorithms with exponential and polynomial speedup relative to counterparts on classical computers. However, the class of quantum algorithms which fail to admit any speed-up is not well characterized. For algorithms using only pure quantum states, speedup requires entanglement to scale with the problem size (2003). For mixed states, there is no such general result so far. Concordant computation is a model for which only classical mixed-state correlations are allowed (no entanglement and no discord) and, even in this special case, the question of whether speedup is ruled out has only partially been answered (arXiv:1006.4402 Bryan Eastin). We present new results which almost – but not entirely - settles this in the affirmative.

9 years, 8 months

[Aspuru-Guzik group list] Summary of RC meeting

by Sam Blau

Dear colleagues, Since not everyone was able to make it to last week's meeting with RC we wanted to write up a short summary of what was discussed. 1. The primary issue is that our group is the heaviest user of the Odyssey cluster (we're using ~14% of it today). This was causing the fairshare number for every member in the group to be set to zero. Thus our partition was acting as a 'first in, first out', even though we have some 'power users' and some 'light users' in the group. 2. Some users in the group had accidentally been assigned the status of 'parent' for the calculation of their fairshare. This was messing up the calculation of fairshare numbers. To resolve points 1 & 2, John Brunelle bumped the Aspuru-Guzik lab's 'raw shares' number to 1000 and set each AAG lab member's raw share number to 100, whereas other labs have a 'raw share' of 100 and user status of 'parent'. This effectively gives us enough decimal places in the fair share calculation to resolve differences within our group, but we still have a low enough fairshare number to not be given too unfair a treatment in the general queue. 3. Since the 'aspuru-guzik' partition is an owned resource, there is no default time-limit as there is with the 'general' partition. Failing to specify a time limit makes life difficult for the scheduler. We proposed having a default time limit of 7 days for our partition. John is investigating if it is possible to implement a 'default' time limit. This will be a default only, not a cap. i.e. if you specify a -t limit greater than 7 days, that will be allowed. It is just meant to safeguard against lazy usage where someone forgets to specify -t. In the mean time, please continue to do your best to specify time and memory limits for your jobs, as it will maximize our usage of this shared resource. At present even setting a time limit of six months is better for the scheduler than not setting any time limit. 4. We don't have a testing queue, but it is possible to use any partition in interactive mode, not just the -p 'interact' nodes. To do this on the aspuru-guzik partition you can do 'srun -p aspuru-guzik ...' entirely similarly to the way that you launch interactive jobs on the interactive partition nodes. It is usually pretty easy to get time on the interactive nodes so those at the meeting felt that there was not a need at this time to set up a separate aspuru-guzik test queue. John and others at RC are being very responsive to our concerns with the cluster even though RC is very understaffed at the moment. We owe them a lot of thanks. Best wishes, -Martin & Sam

9 years, 8 months

[Aspuru-Guzik group list] Event for post-doc (requires registration)

by Guerreschi, Gian

Open to all Cambridge postdocs, sponsored by the FAS Office of Postdoctoral Affairs: POSTDOC SUMMER CELEBRATION DATE: Friday, August 1 (registration required) TIME: 5:00-7:00pm LOCATION: Biolabs Courtyard, 16 Divinity Avenue, Cambridge, MA Take a break from your research, unwind and meet fellow postdocs at our Summer Celebration! Drinks and light appetizers will be provided. Registration is required. To register, https://www.surveymonkey.com/s/SummerCelebration_Aug2014<https://urldefense.proofpoint.com/v1/url?u=https://www.surveymonkey.com/s/S…>

9 years, 8 months

[Aspuru-Guzik group list] Fwd: Duke Univ - Dept of Chemistry - seeking applications for a High Performance Computing Systems Administrator

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: Trish McMillan <trish.mcmillan(a)duke.edu> Date: Mon, Jul 28, 2014 at 3:36 AM Subject: Duke Univ - Dept of Chemistry - seeking applications for a High Performance Computing Systems Administrator To: Trish McMillan <trish.mcmillan(a)duke.edu> Dear Faculty, On behalf of the Department of Chemistry and Profs. David Beratan and Weitao Yang, I write to ask that you forward the attached advertisement for a High Performance Computing Systems Administrator to anyone in your department or university that may be interested in applying for our position. Applicants should submit a cover letter, CV, a statement of interests and the contact information for at least 3 references in PDF format via email to trish.mcmillan at duke.edu. Thank you in advance for your consideration. Best Regards, *Trish* Trish McMillan, Administrative Manager Duke University, Department of Chemistry 124 Science Drive, Room 3237 Box 90354 Durham, NC 27708 919.660.1507

9 years, 9 months

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aspuru-list July 2014