aspuru-list February 2011

aspuru-list@lists.fas.harvard.edu

24 participants
69 discussions

[Aspuru-Guzik group list] [qip] Special Group meeting on Thursday

by Edward Farhi

Dear Quanta Barry Sanders will give a talk in a special group meeting on Thursday at 11 in 6-310. I hope the room is available. If not we will find another spot. Eddie Title: Simulating Time-Dependent Quantum Dynamics On A Quantum Computer Since 1982, when Feynman first proposed efficiently simulating Hamiltonian dynamics on a quantum computer as a way around classical-computer intractability, great advances have been achieved in developing general-purpose quantum-simulation algorithms for bounded-error solutions that fully account for all consumed computational resources. The primary focus has been on time-independent Hamiltonian evolution, but time-dependent Hamiltonian evolution is also important as it is central to quantum control and adiabatic processes. I report our efficient quantum algorithm for simulating time-dependent Hamiltonian evolution of general input states on a quantum computer provided that the Hamiltonian is sufficiently smooth. The time cost of our algorithm is close to linear in the evolution time, hence comparable to algorithms for simulating time-independent Hamiltonian evolution. Our algorithm is based on queries to an oracle holding the Hamiltonian, and we assign unit cost per bit or ! qubit for oracle calls in contrast to previous work wherein an oracle query yields an arbitrary number of bits or qubits at constant cost. Our per-bit or per-qubit costing of oracle calls reveals hitherto unnoticed simulation costs even for the case of simulating time-independent Hamiltonian evolution. We also account for discretization errors in the time and the representation of the Hamiltonian. Consequently our algorithm not only enables simulation of time-dependent quantum dynamics on a quantum computer but also reduces to the time-independent evolution case and with a fair assessment of oracle-query cost. ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Edward Farhi Cecil and Ida Green Professor of Physics Director Center for Theoretical Physics 6-300 Massachusetts Institute of Technology Cambridge MA 02139 617 253 4871 ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

13 years, 2 months

[Aspuru-Guzik group list] Lunch with tomorrow's seminar speaker

by tempel＠physics.harvard.edu

Dear group, There are 8 available spots for lunch with tomorrow's seminar speaker Alfredo Alexander-Katz. We will meet in the common area at 11:45 am and then head over to the faculty club for lunch from 12 - 1:30. Please let me know if you would like to go. thanks, David

13 years, 2 months

[Aspuru-Guzik group list] group meeting cross-posting with the Van Voorhis group

by Johannes Hachmann

Hi everybody, We have started a cross-posting effort for group meeting, seminar, and talk announcements with the Van Voorhis group. We have reactivated the old aspuru-meetings-list and the MIT people are already signed up (as is the entire Aspuru-Guzik group). Please send future announcements through this list and make sure that the place is clear and the announcement timely. Please also try to add an abstract so that the MIT people can decide whether they want to come over or not. All other group business continues to go over the main group list. Best Johannes ----------------------------------------------- Dr. Johannes Hachmann Postdoctoral Fellow Aspuru-Guzik Research Group Harvard University Department of Chemistry and Chemical Biology 12 Oxford St, Rm M104A Cambridge, MA 02138 USA eMail: jh(a)chemistry.harvard.edu -----------------------------------------------

13 years, 2 months

[Aspuru-Guzik group list] Visit from Lincoln Labs tomorrow.

by Alan Aspuru-Guzik

Dear all, The LIncoln Labs quantum computing team (Chiaverini, Gouker, and colleagues) Will be with us 9.30 - 11.30 AM tomorrow in the Division room. Feel free to show up, especially if you are into the quantum simulation area. Best, Alan Alán Aspuru-Guzik | Associate Professor Harvard University | Department of Chemistry and Chemical Biology 12 Oxford Street, Room M113 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru

13 years, 2 months

[Aspuru-Guzik group list] not more spam: rehearsal of a job talk today at 1pm

by Semion Saikin

Dear Group, I'm going for an interview in a day and would like to rehears my presentation. If you have time, please help me with that. I have booked the Division room for today from 1 to 2pm. Thank you, Semion

13 years, 2 months

[Aspuru-Guzik group list] (no subject)

by Semion Saikin

Just to clarify my position. I'm not supporting the idea described in the article. My long standing position is that outside the academia there is no life also. -- ******************************************** 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 ********************************************

13 years, 2 months

[Aspuru-Guzik group list] (no subject)

by Semion Saikin

http://blog.devicerandom.org/2011/02/18/getting-a-life/

13 years, 2 months

[Aspuru-Guzik group list] TODAY at 6pm: The Future of Energy with Cherry A. Murray - "In Deep Water: The Gulf Oil Spill Disaster & the Future of Offshore Drilling in the U.S."

by Center for the Environment

Finding secure, safe and reliable sources of energy to power world economic growth will be one of the great challenges of this century. The Harvard University Center for the Environment invites the Harvard community to take up the challenge by participating in this ongoing series of discussions. THE FUTURE OF ENERGY Spring 2011 “In Deep Water: The Gulf Oil Spill Disaster and the Future of Offshore Drilling in the U.S." Cherry A. Murray, Dean, Harvard School of Engineering & Applied Sciences; Commission Member, National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling with Richard Sears, MIT Visiting Scientist; Commission Senior Science and Engineering Advisor TODAY 6:00 pm Harvard University Science Center D 1 Oxford Street, Cambridge On April 20, 2010 the U.S. faced the worst accidental oil spill—and by some assessments—environmental disaster in the history of the country. The Transocean Deepwater Horizon rig, 41 miles off the coast of Louisiana, blew up, killing 11 and leaking millions of gallons of oil into the Gulf of Mexico. As the National Commission on the BP Deepwater Horizon Oil Spill and Offshoring Drilling wraps up its investigative report, Commission member Cherry A. Murray will offer a rare insider’s look on carrying out President Obama’s charge to “follow the facts wherever they led.” Rich Sears, who served as the Senior Science and Engineering Advisor on the Commission and is a former VP of Deepwater Services at Royal Dutch Shell, will then give a primer on such wells are drilled and explore the what and why of the blowout that doomed the Deepwater Horizon. Murray will conclude with a summary of the recommendations given by the Commission to the U.S. Congress and the oil/gas industries. Both will answer questions about the lessons learned from the accident and suggest ways to move forward. The Future of Energy lecture series is sponsored by the Harvard University Center for the Environment with generous support from Bank of America. All of the lectures are free and open to the public. View detailed lecture information at www.environment.harvard.edu. Contact: Brenda Hugot Program Administrator Harvard University Center for the Environment 24 Oxford Street Cambridge, MA 02138 bhugot(a)fas.harvard.edu p. 617-496-1788 f. 617-496-0425 *|LIST:Future of Energy|* [2]Unsubscribe aspuru-list(a)lists.fas.harvard.edu from this list. Links: 2. http://harvard.us1.list-manage.com/unsubscribe?u=7532d1fbf18f39219ac742ebe&… Our mailing address is: 24 Oxford St. Cambridge, MA 02138 T: (617) 495-0368 www.environment.harvard.edu Copyright (C) 2008 Harvard University. All rights reserved. [3]Forward this email to a friend Links: 3. http://us1.forward-to-friend.com/forward?u=7532d1fbf18f39219ac742ebe&id=a90…

13 years, 2 months

[Aspuru-Guzik group list] [qip] Tuesday the 22

by Edward Farhi

Dear Quanta We will meet on Tuesday the 22nd at 11:00 in 6-310. We have no agenda but it is a good idea to touch base with each other. Best, Eddie ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Edward Farhi Cecil and Ida Green Professor of Physics Director Center for Theoretical Physics 6-300 Massachusetts Institute of Technology Cambridge MA 02139 617 253 4871 ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

13 years, 2 months

[Aspuru-Guzik group list] Ion Traps

by Jarrod McClean

Hi All, I am giving a brief informal lesson on Tuesday at 11 am about ion traps with particular focus on their application in quantum simulation. If you have any interest in listening in and asking questions, let me know! If more than a few people are interested, we might be able to go somewhere with a projector, otherwise it will most likely be an informal gathering in Alan's office. Cheers, ~Jarrod

13 years, 2 months

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aspuru-list February 2011