aspuru-list April 2011

aspuru-list@lists.fas.harvard.edu

23 participants
74 discussions

[Aspuru-Guzik group list] Bittner dinner plans

by Leslie Vogt

Hi guys, Is anyone interested in meeting Prof. Eric Bittner for a late dinner this evening? Also, there are still spots available for dinner tomorrow after the seminar. Let me know if you are hungry! Leslie -- Leslie Vogt Aspuru-Guzik Group Chemistry and Chemical Biology Harvard University

13 years

[Aspuru-Guzik group list] Updated Quantum Photonics Talk Abstract for Today at 11am

by Jarrod McClean

Hi All, The talk today at 11am in the division room will be shared by all of our three visitors, and has the following abstract: Alberto Politi, Alberto Peruzzo, Jonathan Matthews - Centre for Quantum Photonics, University of Bristol Advances in integrated quantum photonics We report our latest work in integrated quantum photonics (IQP) within Silica-on-Silicon waveguide chips. Amongst several demonstrations, near-unit fidelity quantum interference and two-photon entangling logic operation, the first integrated quantum metrology experiments beating the standard quantum limit, a compiled version of Shor's quantum factoring algorithm on a waveguide chip and multiport interferometers on integrated devices that rely on multimode interference are shown. Moving forward to new materials, arrays of 21 evanescently coupled waveguides, were fabricated in SiON chips to implement quantum walks and a generalised form of two-photon non-classical interference, which were observed via two photon correlation. All these demonstrations illustrate the importance of integrated optics for future quantum technology.

13 years

[Aspuru-Guzik group list] TODAY at 5PM: Future of Energy with Jeffrey Sachs

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 "Hurrying History: Can the World Adopt a Fast Path to Low-Carbon Energy?" Jeffrey D. Sachs Director The Earth Institute at Columbia University TODAY 5:00 pm Science Center, Lecture Hall D One Oxford Street, Cambridge The world will eventually transit from the fossil-fuel age to a post-carbon economy. That is inherent in the finite reserves of fossil fuels. Yet the normal transition will be far too slow to avoid ruinous interference in the climate system. Twenty years after the signing of the UN Framework Convention on Climate Change the existing political-diplomatic processes have failed to create the needed breakthrough. Jeffrey Sachs will discuss new strategies for large-scale systems change that aim to correct the deep weaknesses of the current framework. His thesis states that new transnational networks of key actors – scientists, engineers, businesses, and civic leaders – must take the lead from governments and diplomats. He will explain how this can be done, with reference to past cases of large-scale systems change. Sachs is the Director of The Earth Institute, Quetelet Professor of Sustainable Development, and Professor of Health Policy and Management at Columbia University. He is also Special Advisor to United Nations Secretary-General Ban Ki-moon. From 2002 to 2006, he was Director of the UN Millennium Project and Special Advisor to United Nations Secretary-General Kofi Annan on the Millennium Development Goals, the internationally agreed goals to reduce extreme poverty, disease, and hunger by the year 2015. Sachs is also President and Co-Founder of Millennium Promise Alliance, a nonprofit organization aimed at ending extreme global poverty. He is widely considered to be the leading international economic advisor of his generation. For more than 20 years Professor Sachs has been in the forefront of the challenges of economic development, poverty alleviation, and enlightened globalization, promoting policies to help all parts of the world to benefit from expanding economic opportunities and wellbeing. He is also one of the leading voices for combining economic development with environmental sustainability, and as Director of the Earth Institute leads large-scale efforts to promote the mitigation of human-induced climate change. In 2004 and 2005 he was named among the 100 most influential leaders in the world by Time Magazine. He was awarded the Padma Bhushan, a high civilian honor bestowed by the Indian Government, in 2007. Sachs lectures constantly around the world and was the 2007 BBC Reith Lecturer. He is author of hundreds of scholarly articles and many books, including the New York Times bestsellers Common Wealth (Penguin, 2008) and The End of Poverty (Penguin, 2005). Sachs is a member of the Institute of Medicine and is a Research Associate of the National Bureau of Economic Research. Prior to joining Columbia, he spent over twenty years at Harvard University, most recently as Director of the Center for International Development. A native of Detroit, Michigan, Sachs received his B.A., M.A., and Ph.D. degrees at Harvard University. 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|* [3]Unsubscribe aspuru-list(a)lists.fas.harvard.edu from this list. Links: 3. 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. [4]Forward this email to a friend Links: 4. http://us1.forward-to-friend.com/forward?u=7532d1fbf18f39219ac742ebe&id=60c…

13 years

[Aspuru-Guzik group list] Special Group Meeting/Quantum Photonics Talk Tomorrow

by Jarrod McClean

Hi All, So there will be a special talk by a visitor to the Aspuru-Guzik group tomorrow Speaker: Alberto Peruzzo Time: 11 am Place: Division Room Topic: Recent work on integrated quantum photonic circuits in the Centre for Quantum Photonics at the University of Bristol.

13 years, 1 month

[Aspuru-Guzik group list] [qip] Fwd: Fw: upcoming Applied Math Colloquium on topological order and quantum computing

by Scott Aaronson

---------- Forwarded message ---------- From: Xiao-Gang Wen <wen(a)dao.mit.edu> Date: 2011/4/3 Subject: Fw: upcoming Applied Math Colloquium on topological order and quantum computing To: aaronson(a)csail.mit.edu Hi Zhenghan Wang from Microsoft (http://stationq.cnsi.ucsb.edu/~wang/) is giving the applied mathematics colloquium this Monday (April 4) at 4:30pm in 2-105 on topological phases and quantum computing, which may be of interest to you and your students. Feel free to forward the info about the talk to anyone who might be interested. Xiao-Gang Begin forwarded message: > > Applied Mathematics Colloquium, April 4 2011, 4:30pm, Room 2-105 > Title: Topological phases of matter: modeling and application to > quantum computing > Speaker: Zhenghan Wang, Microsoft Research > > ABSTRACT: > > Topological phases of matter are exotic quantum states of matter > that possess an elusive order, dubbed topological order by X.-G. > Wen. Elementary excitations in topological phases of matter are > quasi-particles, named anyons by F. Wilczek, which obey neither > bosonic nor fermionic statistics. Modeling of two dimensional > topological phases of matter utilizes a diverse variety of > mathematics: (2+1)-topological quantum field theory as effective > theory, conformal field theory as edge theory, and modular tensor > category as an algebraic theory of anyons. A topological phase of > matter that harbors non-abelian anyons is essentially a topological > quantum computer immune to local errors and thus provides a > realization of fault-tolerant quantum computation. > > In this survey talk, we will start with the only currently known > examples of topological phases of matter---fractional quantum Hall > liquids--and explain their theoretical models. > The effective theories of fractional quantum Hall liquids are the > quantum Witten-Chern-Simons theories, and the major components of > the modeling ground state wave functions of quantum Hall liquids are > translation-invariant symmetric polynomials with an arbitrary number > of variables (most such polynomials occur as conformal blocks of the > conformal field theories which describe the edges). Next, we will > discuss how quantum computing is carried out by braiding non-abelian > anyons. We will address when braiding alone can lead to universal > quantum gates and hence Shor抯 factoring algorithm can be > implemented by a topological quantum computer. Finally, we > conjecture that the failure of the universality of braiding gates is > related to a form of explicit locality in topological quantum field > theory involving the Yang-Baxter equation. ------- End of Forwarded Message ------- ----------------------------------------- Xiao-Gang Wen Cecil and Ida Green Professor of Physics Department of Physics, 6C-317 Phone 617-253-5016 Massachusetts Institute of Technology Fax 617-253-2562 77 Massachusetts Avenue Cambridge, MA 02139 _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

13 years, 1 month

[Aspuru-Guzik group list] Fwd: International collaborations.

by Anna B. Shin

Anna B. Shin Laboratory Administrator | Aspuru-Guzik Research Group Department of Chemistry and Chemical Biology | Harvard University 12 Oxford Street | Cambridge, MA 02138 617.496.9964 office | 617.694.9879 cell | 617.496.9411 fax http://aspuru.chem.harvard.edu/ <https://mail.google.com/mail/u/0/?ui=2&ik=e7480c62f0&view=att&th=12eee19970…> ---------- Forwarded message ---------- From: Alan Aspuru-Guzik <alan(a)aspuru.com> Date: Mon, Apr 4, 2011 at 10:11 AM Subject: International collaborations. To: "Anna B. Shin" <anna(a)chemistry.harvard.edu>, AAG Assistant < aspuru-assistant(a)chemistry.harvard.edu>, Ivan Kassal <ivan.kassal(a)gmail.com> Dear group members, I need the following information ASAP: Please send to Anna today or tomorrow: a) Are you involved in an international collaboration? b) If so, list the group and the website of the group? c) Have you travelled there in the last 2 years? How many times? Provide dates. d) Who has paid for it? (Our group, their group?, both?) IF you know the grant that paid for it, let us know as well. e) Estimate the total number of days that you have been abroad for this collaboration. Harvard needs this info, and a *collective* response from you ASAP is important for success in collecting information about this. 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, 1 month

[Aspuru-Guzik group list] Announcement: Excitonics Seminar, Tomorrow. April 5, 3 PM/ 36-428

by Cathy Bourgeois

Please forward to your groups and post in your area ______________________________________ Center for Excitonics Seminar Series Announcement Tuesday, April 5, 2011 3:00 PM RLE Conference Room: 36-428 Charge separation by photoexcitation in semicrystalline polymeric semiconductors: An intrinsic or extrinsic mechanism? Carlos Silva, Université de Montréal Abstract: Understanding charge generation by light absorption in polymeric semiconductors is of profound scientific importance due to the vigorous drive to develop organic solar cells. Confusion prevails with respect to the intrinsic charge photogeneration mechanism in neat (undoped) semicrystalline films. Numerous publications report charge photogeneration yields (the number of electron-hole pairs produced per absorbed photon) up to 30% on sub-picosecond timescales in neat regioregular poly(3-hexylthiophene) films. This is difficult to reconcile with the accepted picture that Frenkel excitons are the primary photoexcitations. Their binding energy is much higher than the lattice thermal energy at room temperature, such that direct charge generation ought to be improbable. Considering this, two fundamental questions arise: (i) what is the mechanism of direct charge photogeneration in semicrystalline polymer semiconductors? (ii) What is the role of solid-state microstructure in defining it? Here, we combine transient photoluminescence and absorption probes and find that charge photogeneration at 10 K occurs continuously over sub-nanosecond timescales, and not by a diffusion-limited exciton dissociation at defect sites. Rather, we conclude that it is an extrinsic process that occurs efficiently by dissociation of excitons localised at interfaces between crystalline and non-crystalline domains, and is driven by interfacial energetic disorder. Bio: Carlos Silva, Canada Research Chair in Organic Semiconductor Materials, is Associate Professor of Physics at the Université de Montréal, having joined the department in 2005. He is the 2010 laureate of the Herzberg Medal of the Canadian Association of Physicists. He has extensive expertise in ultrafast optical probes of electronic dynamics in organic semiconductors with applications in optoelectronics. He obtained a PhD in chemical physics from the University of Minnesota in 1998 and was a Postdoctoral Research Associate in the Cavendish Laboratory of the University of Cambridge from 1998 to 2001. In 2001 he obtained an Advanced Research Fellowship from the UK Engineering and Physical Sciences Research Council, which he undertook at the Cavendish Laboratory. The central theme of his research programme concerns the understanding of electronic dynamics in organic semiconductors using transient photoluminescence and absorption spectroscopies.

13 years, 1 month

[Aspuru-Guzik group list] [qip] Tuesday

by Edward Farhi

Dear Quanta We will meet on Tuesday April 5 at 11. We will be joined by Zhenghan Wang who is speaking on Monday at 4:30. 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

13 years, 1 month

[Aspuru-Guzik group list] Visitors from Jeremy O'Brien's Quantum Photonics group

by Jarrod McClean

Hi All, Two graduate students (Alberto Peruzzo and Jonathan Matthews) and a research fellow(Alberto Politi) from Jeremy O'Brien's group at the University of Bristol will be visiting this week (Week of April 4th). They work on quantum computation with photons and have the ability to construct photon waveguides which can create arbitrary couplings between modes, for up to 16 reconfigurable modes, and 21 non-reconfigurable modes. If you would like to meet with them to discuss any of this, you can contact me or approach them directly. Alberto Peruzzo has requested to give a special group meeting this week on the work they have been doing. The date and time of this will be confirmed tomorrow, and an email will follow with details. ~Jarrod

13 years, 1 month

[Aspuru-Guzik group list] Fwd: QuEBS 11: Registration Open

by Aspuru

Alan Aspuru-Guzik Associate Professor Harvard University http://aspuru.chem.harvard.edu Sent from my mobile. Please pardon any typos. Begin forwarded message: > From: Martin Plenio <martin.plenio(a)uni-ulm.de> > Date: April 3, 2011 12:57:03 PM EDT > To: Martin Plenio <martin.plenio(a)uni-ulm.de> > Subject: QuEBS 11: Registration Open > > Dear Colleagues, > > submission of abstracts and pre-registration for the QuEBS’11 in Ulm, Germany > > is now open at the official workshop page > > http://www.uni-ulm.de/nawi/quebs2011.html > > > > Please note that abstract submission closes on May 1, 2011. Please apply early as > > the number of participants and conference grants are limited. > > > > With best wishes > > Greg Engel > > Susana Huelga > > Martin Plenio > > > > > > Martin B Plenio > > Alexander von Humboldt Professor > > Direktor, Institut fur Theoretische Physik > > > > Universitaet Ulm > > Albert-Einstein-Allee 11 > > D-89069 Ulm > > Germany > > > > Tel: +49 (0) 731 50 22900 > > +49 (0) 731 50 22911 > > Fax: +49 (0) 731 50 22924 > > http://www.qubit-ulm.com/ > > > > | Professor (Part Time) > > | Blackett Laboratory > > | Imperial College London > > | London SW7 2BW > > | UK > > > > > >

13 years, 1 month

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aspuru-list April 2011