aspuru-list May 2017

aspuru-list@lists.fas.harvard.edu

18 participants
54 discussions

[Aspuru-Guzik Group List] FW: Excitonics Seminar: David Snoke, TODAY -May 9 at 4:30 pm, in 36-428

by Catherine M Bourgeois

TODAY! CENTER FOR EXCITONICS Presents: Superfluids of Light TUESDAY - May 9, 2017 at 4:30pm/36-438 RLE Haus Rm David Snoke University of Pittsburgh, Department of Chemistry [http://www.rle.mit.edu/excitonics/wp-content/uploads/2014/07/Snoke002.jpg] Polaritons in microcavities can be viewed as dressed photons- light interacts with electronic states in a solid in such a way that the photons have an effective mass and repulsive interactions. Because they are bosons, they can undergo Bose-Einstein condensation at low temperature and become superfluid. It is now routine to make polariton condensates, including in thermal equilibrium, with demonstrations of such canonical effects as quantized vortices, Josephson oscillations, and phase locking of two condensates. We can also now easily see transport of polariton condensates over long distances of hundreds of microns, allowing the possibility of polaritonic circuits. I will present recent work on flow of polariton condensates in one-dimensional channels and circular rings, and discuss recent work on creating polariton condensates at room temperature. David Snoke received his PhD in physics from the University of Illinois at Urbana-Champaign. He has worked for The Aerospace Corporation and was a visiting scientist and Fellow at the Max Planck Institute. In 2006, he was elected a Fellow of the American Physical Socieity with the citation, "For his pioneering work on the experimental and theoretical understanding of dynamical optical processes in semiconductor systems." His research has focused on basic processes and phase transitions of electrons, holes, including non equilibrium dynamics of electron plasma and excitons, the Mott transition from exciton gas to electron-hole plasma and Bose-Einstein condensation of excitons and polaritons. His research group at the University of Pittsburgh uses stress to trap excitons in confined regions, similar to the way atoms are confined in traps for Bose-Einstein condensation experiments. The Center For Excitonics Is An Energy Frontier Research Center Funded By The U.S. Department Of Energy, Office Of Science And Office Of Basic Energy Sciences Light refreshments will be served at 4:15 pm.

6 years, 12 months

[Aspuru-Guzik Group List] Excitonics Seminar: David Snoke, TOMORROW -May 9 at 4:30 pm, in 36-428

by Catherine M Bourgeois

Please post and forward to your groups: CENTER FOR EXCITONICS Presents: Superfluids of Light TUESDAY - May 9, 2017 at 4:30pm/36-438 RLE Haus Rm David Snoke University of Pittsburgh, Department of Chemistry [http://www.rle.mit.edu/excitonics/wp-content/uploads/2014/07/Snoke002.jpg] Polaritons in microcavities can be viewed as dressed photons- light interacts with electronic states in a solid in such a way that the photons have an effective mass and repulsive interactions. Because they are bosons, they can undergo Bose-Einstein condensation at low temperature and become superfluid. It is now routine to make polariton condensates, including in thermal equilibrium, with demonstrations of such canonical effects as quantized vortices, Josephson oscillations, and phase locking of two condensates. We can also now easily see transport of polariton condensates over long distances of hundreds of microns, allowing the possibility of polaritonic circuits. I will present recent work on flow of polariton condensates in one-dimensional channels and circular rings, and discuss recent work on creating polariton condensates at room temperature. David Snoke received his PhD in physics from the University of Illinois at Urbana-Champaign. He has worked for The Aerospace Corporation and was a visiting scientist and Fellow at the Max Planck Institute. In 2006, he was elected a Fellow of the American Physical Socieity with the citation, "For his pioneering work on the experimental and theoretical understanding of dynamical optical processes in semiconductor systems." His research has focused on basic processes and phase transitions of electrons, holes, including non equilibrium dynamics of electron plasma and excitons, the Mott transition from exciton gas to electron-hole plasma and Bose-Einstein condensation of excitons and polaritons. His research group at the University of Pittsburgh uses stress to trap excitons in confined regions, similar to the way atoms are confined in traps for Bose-Einstein condensation experiments. The Center For Excitonics Is An Energy Frontier Research Center Funded By The U.S. Department Of Energy, Office Of Science And Office Of Basic Energy Sciences Light refreshments will be served at 4:15 pm.

6 years, 12 months

[Aspuru-Guzik Group List] Welcome New Post Doc: Loïc Roch

by Siria Serrano

Dear All, Please welcome new group member and Post-Doc* Loïc Roch*. He is seating in the big office downstairs next to Jose for the moment. Please swing by sometime today and welcome him to the group. Cheers, 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>*

6 years, 12 months

[Aspuru-Guzik Group List] Excitonics and Quantum Subgroup Meetings Moved, May 26th

by Siria Serrano

Dear All, Please note that the* Excitonics Subgroup Meeting *will take place on* Friday, June 2nd 1:30-2:30 PM.* The *Quantum Subgroup Meeting* has been moved to *Thursday, June 8th 10:30-11:30 AM. * Cheers, 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>*

6 years, 12 months

[Aspuru-Guzik Group List] [qip] talk Friday, May 12, 12:30pm on area law violations

by Aram Harrow

(We will also have a group meeting that morning at the usual time with Fernando Brandao joining us.) ------- Please join us at *12:30pm *on *Friday, May 12, 2017 *for a * Special Condensed Matter Physics Seminar* with *Ramis Movassagh, *IBM TJ Watson Research Center The seminar will be held in the Duboc room 4-331. Please see the details of Ramis’ talk below. *Title:* Supercritical Entanglement: counter-examples to the area law for quantum matter *Abstract:* In recent years, there has been a surge of activities in proposing exactly solvable quantum spin chains with the surprisingly high amount of ground state entanglement entropies--beyond what one expects from critical systems describable by conformal field theories (i.e., super-logarithmic violations of the area law). We will introduce entanglement and discuss these models. We prove that the ground state entanglement entropy is \sqrt(n) and in some cases even extensive (i.e., ~n) despite the underlying Hamiltonian being: 1. Local 2. Having a unique ground state and 3. Being translationally invariant in the bulk. These models have rich connections with combinatorics, random walks, and universality of Brownian excursions. Lastly, we develop techniques that enable proving the gap of these models. As a consequence, the gap scaling of 1/n^c with c>1 that we prove rules out the possibility of these models having a relativistic conformal field theory description. Time permitting, we will discuss more recent developments in this direction. References: ---------------- . Movassagh, Farhi, Goldstone, Nagaj, Osborne, Shor, PRA (2010) . Bravyi, Caha, Movassagh, Nagaj and Shor, PRL (2012) . Movassagh and Shor, PNAS, doi:10.1073/pnas.1605716113 (2016) http://www.pnas.org/content/early/2016/11/02/1605716113.abstract . https://arxiv.org/abs/1609.09160 . (with L. Levine) https://arxiv.org/abs/1611.03147 *Date:* Friday, May 12, 2017 *Time:* 12:30pm *Room:* Duboc 4-331 _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

6 years, 12 months

[Aspuru-Guzik Group List] Excitonics Seminar: David Snoke, May 9 at 4:30 pm, in 36-428

by Catherine M Bourgeois

6 years, 12 months

[Aspuru-Guzik Group List] [qip] group meeting tomorrow

by Aram Harrow

Dear quanta, We will meet tomorrow at the usual coordinates (6-310, 11am). Seth will tell us about his recent work. -aram _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

7 years

[Aspuru-Guzik Group List] Theo-chem visit May 11 with Dr. Ivet Bahar

by Benjamin Sanchez Lengeling

Hi Dr. Ivet Bahar from University of Pittsburgh will be visiting us as part of the Theoretical Chemistry seminar next *Thursday, May 11.* Dr. Ivet Bahara is well-known for her work in describing protein structure using normal mode analysis and has a lot of recent structural bioinformatics work. (*http://www.ccbb.pitt.edu/Faculty/bahar/index.php <http://www.ccbb.pitt.edu/Faculty/bahar/index.php>*) *Want to signup for a meeting with him and/or lunch or dinner?* Send me a note (bsanchezlengeling(a)g.harvard.edu or beangoben(a)gmail.com) Hope all Ben Sanchez

7 years

[Aspuru-Guzik Group List] Work On Converse

by Siria Serrano

Group, Facilities will be doing work on the first floor of Converse today so they'll be out in the hall with ladders and going into some of the lab rooms. Please help out by staying out of their way and giving them access to space if they need it. Let Felix or I know if you have any questions or concerns. 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>*

7 years

[Aspuru-Guzik Group List] Group meeting, Thu May 04, 3:30 PM, Div Room

by Ian Kivlichan

Hi all, David Huang is visiting us on sabbatical from Adelaide. He'll talk tomorrow at group meeting - see below for the title and abstract! All the best, Ian ----------------- Title: Excursions in soft condensed matter theory and computation Abstract: I will give an overview of the research in my group, which is broadly concerned with understanding the properties of soft condensed matter, with a focus on problems involving a wide range of length and/or time scales and in which structural and electronic properties are often strongly coupled. I will discuss applications of this work to nanofluidics, porous functional materials, and organic electronics.

7 years

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aspuru-list May 2017