aspuru-list May 2015

aspuru-list@lists.fas.harvard.edu

17 participants
48 discussions

[Aspuru-Guzik group list] [qip] Friday at the 15th

by Edward Farhi

Hi Quanta We will meet tomorrow at 11:00 in our usual spot. We have Sergey Bravyi speaking at 1:30 and perhaps he will join us in our meeting. See you there! Eddie Edward Farhi Director Center for Theoretical Physics Massachusetts Institute of Technology farhi(a)mit.edu _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

8 years, 11 months

[Aspuru-Guzik group list] [qip] Special seminar - Lídia del Rio (next Monday)

by Cyril Stark

Hi Everybody, Next Monday Lídia del Rio from the University of Bristol will give a special seminar. Please find the details below. I hope to see you there, cyril -- Title: Resource theories of knowledge Place: 6C-442 Time: 1:30 (May 18) Abstract: Inspired by quantum information approaches to thermodynamics, we introduce a general framework for resource theories, from the perspective of subjective agents. First we formalize a way to think of subjective knowledge through what we call specification spaces, where states of knowledge (or specifications) are represented by sets whose elements are the possible states of reality admitted by an observer. We explore how to conciliate different views of reality via embeddings between specification spaces. Then we introduce resource theories on specification spaces, which are constructed from a set of allowed operations, imposing a pre-order structure in the specification space. We see how to relate, combine and create different resource theories. The local structure of a specification space (which in quantum theory is given by tensoring different Hilbert spaces) is not assumed a priori. Instead, we derive it operationally from commutativity relations in the set of transformations. Further applications are discussed. -- 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, 11 months

[Aspuru-Guzik group list] Excitonics Seminar: Brian Skinner, TODAY, 3 pm, 36-428

by Catherine M Bourgeois

Please post and forward to your groups Center for Excitonics Special Seminar Disorder-assisted transport in topological insulators and nanocrystal superlattices May 14, 2015 at 3pm/36-428 Brian Skinner Argonne National Laboratory [Brian_Skinner] abstract: In solid state materials, disorder is usually thought of as a hindrance to electron transport. But when the disorder is produced by poorly-screened charged impurities, the long-ranged nature of the disorder potential can have unexpected consequences for the electrical conductivity. In this talk I discuss two situations where the presence of charged impurities leads to an exponential increase in the conductivity. In the first part of the talk, I show how the unexpectedly large bulk conductivity in topological insulators is the consequence of large band-bending produced by Coulomb impurities. In the second part, I consider hopping transport in nanocrystal superlattices, and show that the presence of charged impurities leads to a universal form of the temperature-dependent conductivity. bio: Brian Skinner is the Eugene Wigner postdoctoral fellow at Argonne National Laboratory, where he works in the condensed matter theory group of the Materials Science Division. Brian did his PhD at the University of Minnesota with Boris Shklovskii, where he worked primarily on electronic systems with strong Coulomb interactions. He is joining the Center for Excitonics in the fall as a postdoctoral "theorist in residence." Light refreshments will be served

8 years, 11 months

[Aspuru-Guzik group list] ITAMP lunch discussion - Prof. Vasili Kharchenko, ITAMP/UConn (05/15)

by Richard Schmidt

Dear colleagues, this week we are looking forward to a talk by one of our professors, Vasili Kharchenko. Kind regards, Richard and Swati ITAMP Topical Lunch Discussion Date: Friday, May 15th 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. Vasili Kharchenko (ITAMP, University of Connecticut, Storrs) Title: Collision Relaxation in Classical Gas Abstract: The energy and momentum relaxation of fast particles in atomic and molecular gases have been analysed. The steady state and time-dependent non-equilibrium distributions of atomic particles have been obtained in solutions of the Boltzmann kinetic equation. The collision kernel of the Boltzmann equation, computed with accurate quantum-mechanical differential cross sections, have been used to determine the relaxation kinetics. Comparisons between experimental data and theoretical results are discussed. --------------------------- Dr. Richard Schmidt Institute for Theoretical Atomic, Molecular, and Optical Physics (ITAMP) Harvard-Smithsonian Center for Astrophysics MS-14 60 Garden St. Cambridge, MA 02138 U.S.A. richard.schmidt(a)cfa.harvard.edu Tel. +1 (617) 496-7610 Fax +1 (617) 496-7668

8 years, 11 months

[Aspuru-Guzik group list] [Aspuru-meetings-list] Special Group Meeting, 5/14, 2:30pm Div Room

by Jennifer Wei

Hi Everyone, Tomorrow we will have a special group meeting given by Prof. Lea Santos of Yeshiva University. Please see below for the title and abstract of her talk. Jennifer --------------------------------------- TITLE: Equilibration and thermalization of isolated many-body quantum systems ABSTRACT: In this talk, I will discuss our recent contributions towards a better understanding of many-body quantum systems far from equilibrium. Describing and predicting the behavior of such systems is a problem at the forefront of theoretical physics. The subject is also intertwined with new experimental breakthroughs in the coherent control of complex quantum systems. Focusing on representative low-dimensional interacting quantum systems with and without disorder, we draw general conclusions about: (i) the short- and long-time dynamics, (ii) the size of the temporal fluctuations after relaxation, and (iii) the conditions to reach thermal equilibrium. We find analytical expressions for the dynamics that are in excellent agreement with numerical results. Our studies reveal a richer scenario than the simple picture associating chaos with fast evolution and viability of thermalization. _______________________________________________ Aspuru-meetings-list mailing list Aspuru-meetings-list(a)lists.fas.harvard.edu https://lists.fas.harvard.edu/mailman/listinfo/aspuru-meetings-list

8 years, 11 months

[Aspuru-Guzik group list] Excitonics Seminar: Brian Skinner, May 14, 3 pm, in 36-428

by Catherine M Bourgeois

Please post and forward to your groups ------ Center for Excitonics Special Seminar Disorder-assisted transport in topological insulators and nanocrystal superlattices May 14, 2015 at 3pm/36-428 Brian Skinner Argonne National Laboratory [Brian_Skinner] abstract: In solid state materials, disorder is usually thought of as a hindrance to electron transport. But when the disorder is produced by poorly-screened charged impurities, the long-ranged nature of the disorder potential can have unexpected consequences for the electrical conductivity. In this talk I discuss two situations where the presence of charged impurities leads to an exponential increase in the conductivity. In the first part of the talk, I show how the unexpectedly large bulk conductivity in topological insulators is the consequence of large band-bending produced by Coulomb impurities. In the second part, I consider hopping transport in nanocrystal superlattices, and show that the presence of charged impurities leads to a universal form of the temperature-dependent conductivity. bio: Brian Skinner is the Eugene Wigner postdoctoral fellow at Argonne National Laboratory, where he works in the condensed matter theory group of the Materials Science Division. Brian did his PhD at the University of Minnesota with Boris Shklovskii, where he worked primarily on electronic systems with strong Coulomb interactions. He is joining the Center for Excitonics in the fall as a postdoctoral "theorist in residence." Light refreshments will be served

8 years, 11 months

[Aspuru-Guzik group list] Clean Link for the soccer game at 2:45

by Marlon Cummings

Guys: Although I'm busy and by myself, I'll still need a little entertainment. If you have a safe and clean link for the Champions League 2nd leg game, please forward. I'm sure some soccer can inspire my letter writing this afternoon. Thanks, Marlon. ------------ *Marlon G. CummingsLab Manager, Aspuru-Guzik GroupMallinckrodt M136Department of Chemistry and Chemical BiologyHarvard University12 Oxford StreetCambridge, MA 02138617-496-9964617-496-9411 (fax)http://aspuru.chem.harvard.edu/ <http://aspuru.chem.harvard.edu/>*

8 years, 11 months

[Aspuru-Guzik group list] group photos

by Joey Goodknight

enjoy! https://www.dropbox.com/sh/o3tyz2to8qjv4l2/AACMZSDPD7Lpe7mJHd2qFP9la?dl=0

8 years, 11 months

[Aspuru-Guzik group list] Fwd: Kelsey Justis-Housing Search

by Marlon Cummings

Dear group: We have a visitor this summer who is looking for a place to rent from June-Sept. If you know or have a room/unit to rent, please contact him directly. Thanks, Marlon. ----------- *Marlon G. CummingsLab Manager, Aspuru-Guzik GroupMallinckrodt M136Department of Chemistry and Chemical BiologyHarvard University12 Oxford StreetCambridge, MA 02138617-496-9964617-496-9411 (fax)http://aspuru.chem.harvard.edu/ <http://aspuru.chem.harvard.edu/>* ---------- Forwarded message ---------- From: Kelsey C. Justis <kelsey.c.justis.16(a)dartmouth.edu> Date: Fri, May 8, 2015 at 12:53 PM Subject: Kelsey Justis-Housing Search To: "marloncummings(a)chemistry.harvard.edu" < marloncummings(a)chemistry.harvard.edu> Hi Marlon, If you do not mind, could you forward the message below onto the rest of the group as you feel appropriate? Thank you ahead of time. Hello, My name is Kelsey, I am 21 year old guy from Daytona Beach, Florida. I am also a rising senior at Dartmouth College studying physics and computer science. I hope to find great roommate(s) to spend the summer (between June 15th and September 4th) with. I am very clean and easy going. I am budgeting ~$900/month for rent and hope to be either close to campus or public transportation. If you have any questions at all, please feel free to email me at kelsey.c.justis(a)dartmouth.edu, or call/text 386 214-6600. Thank you. Best of luck with your studies, Kelsey

8 years, 11 months

[Aspuru-Guzik group list] Next Wednesday: Special HQOC Seminar: Alejandro Gonzales-Tudela 4PM (Lyman 425)

by Coleman, Karl

There will be a Special HQOC Seminar on Wednesday, May 13, at 4 PM, in Lyman 425. Alejandro Gonzalez-Tudela will be visiting from the Max Planck Institute of Quantum Optics and will present the following talk: Cold Atoms Coupled to Nanophotonics for Quantum Simulation and Information Please see the attached flyer for details. In addition, he will be available on Wednesday (May 13) and Thursday (May 14) for meetings and lab tours. You can use the following scheduler to set up a time: https://docs.google.com/spreadsheets/d/1sf4Fohr5B3Cn6TBS53JO6cbjIxBvnHQ5JHb… Karl Karl Coleman HQOC Laboratory Administrator Faculty Assistant to Profs. Greiner and Lukin Harvard University Department of Physics 17 Oxford Street Cambridge, MA 02138 P: (617) 496-2544 F: (617) 496-2545

8 years, 11 months

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aspuru-list May 2015