aspuru-list November 2013

aspuru-list@lists.fas.harvard.edu

34 participants
83 discussions

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

by Edward Farhi

Hi Quanta We will meet tomorrow at 11:00 in our usual spot. Scott is going to share with us. The afternoon talk by Dirk Englund has been postponed till December 13. 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

10 years, 5 months

[Aspuru-Guzik group list] GROUP MEETING MOVED TO FRIDAY

by Alan Aspuru-Guzik

Dear all, See below. *NOTE THAT GROUP MEETING IS ON FRIDAY and not tomorrow* 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 | http://about.me/aspuru ---------- Forwarded message ---------- From: Ryan Babbush <babbush(a)fas.harvard.edu> Date: Wed, Nov 13, 2013 at 12:00 PM Subject: [Aspuru-Guzik group list] [Aspuru-meetings-list] group meeting this week ON FRIDAY: Peter Love To: aspuru-meetings-list(a)lists.fas.harvard.edu Hi Everyone, Professor Peter Love will present group meeting this week on Friday at 2pm in the Division Room (please note that unusual time). An abstract for Peter's talk is included below. =========================================================== Mixed state entanglement: bounds, computation and optimal ensembles =========================================================== Quantifying entanglement has been a longstanding goal of quantum information theory, and many measures for pure states exist. These measures may be extended to mixed states by the convex roof construction. This requires the determination of the convex decomposition of the density matrix into pure states that minimizes the average pure state entanglement. One may regard this as the mean pure-state entanglement cost of synthesizing the density matrix. This minimization is challenging, and exact solutions are only known in a few cases, the most famous of which is the concurrence for two qubits. The next hardest case would seem to be the three-tangle for mixed states of three qubits, for which an analytic form is currently unknown. In this talk I will describe numerical techniques to both compute and bound the three-tangle, and give some properties of the minimal ensembles for this and other polynomial entanglement monotones. -- Ryan Babbush | PhD Student in Physics (949) 331-3943 | babbush(a)fas.harvard.edu Harvard University | Aspuru-Guzik Group 12 Oxford Street | Cambridge, MA 02138 _______________________________________________ Aspuru-meetings-list mailing list Aspuru-meetings-list(a)lists.fas.harvard.edu https://lists.fas.harvard.edu/mailman/listinfo/aspuru-meetings-list _____________________________________________ Aspuru-list mailing list Aspuru-list(a)lists.fas.harvard.edu https://lists.fas.harvard.edu/mailman/listinfo/aspuru-list

10 years, 5 months

[Aspuru-Guzik group list] Desk Queue

by Marlon Cummings

Dear Friends: For the next four to six months (and during lab renovations), Alan and I will decide on who sits in what office at a particular desk, when necessary. Our lab is moving forward with new endeavors. With that, new staff will be joining. New scientific staff and postdoctoral researchers for new projects will require a desk -- some bigger than others, and in some cases, will need to be clustered together. To this end, the existing desk queue system is on hold until Alan decides on incoming RA and postdoc seating locations. Thank you for your patience. 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/

10 years, 5 months

[Aspuru-Guzik group list] Coffee club NOW

by Joey Goodknight

We have fancy hippy coffee $1 a cup in breakroom. Get it while it lasts! -Joey ************** Please forgive my terseness; I am writing this on my phone.

10 years, 5 months

[Aspuru-Guzik group list] [Aspuru-meetings-list] group meeting this week ON FRIDAY: Peter Love

by Ryan Babbush

Hi Everyone, Professor Peter Love will present group meeting this week on Friday at 2pm in the Division Room (please note that unusual time). An abstract for Peter's talk is included below. =========================================================== Mixed state entanglement: bounds, computation and optimal ensembles =========================================================== Quantifying entanglement has been a longstanding goal of quantum information theory, and many measures for pure states exist. These measures may be extended to mixed states by the convex roof construction. This requires the determination of the convex decomposition of the density matrix into pure states that minimizes the average pure state entanglement. One may regard this as the mean pure-state entanglement cost of synthesizing the density matrix. This minimization is challenging, and exact solutions are only known in a few cases, the most famous of which is the concurrence for two qubits. The next hardest case would seem to be the three-tangle for mixed states of three qubits, for which an analytic form is currently unknown. In this talk I will describe numerical techniques to both compute and bound the three-tangle, and give some properties of the minimal ensembles for this and other polynomial entanglement monotones. -- Ryan Babbush | PhD Student in Physics (949) 331-3943 | babbush(a)fas.harvard.edu Harvard University | Aspuru-Guzik Group 12 Oxford Street | Cambridge, MA 02138 _______________________________________________ Aspuru-meetings-list mailing list Aspuru-meetings-list(a)lists.fas.harvard.edu https://lists.fas.harvard.edu/mailman/listinfo/aspuru-meetings-list

10 years, 5 months

[Aspuru-Guzik group list] Volunteer graduate students (or postdocs) for HarvardX course development.

by Alan Aspuru-Guzik

Dear all, I have been talking to a few of you (and now I am making it global) about the opportunity of volunteering (potential pay may come but it would be mostly symbolic) to participate in developing content for a new HarvardX course on quantum chemistry (called "The Quantum World") that Carlos Amador, Peter Love and myself (amongst others such as Rick Heller, Dudley Herschbach, etc.) will be creating over the next few months. We will be in need of people that want to a) solve problems online b) develop pedagogical materials for specific topics c) help us write concept-tests and d) are willing to perhaps appear as 'cameos' in some of our videos or as students, etc. The team will be of course acknolwedged online and this could be a great thing to add to your CV. I am calling for the enthusiasts amongst you and we would then have periodic meetings with those interested and we would begin developing content almost immediately. We will be using cool tools such as Sparkol VideoScribe, etc. If interested, just write to Carlos and we will compile a list and see how many are interested and make sure you can help us participate in this. Cheers, 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.ed u <http://aspuru.chem.harvard.edu> | http://about.me/aspuru

10 years, 5 months

[Aspuru-Guzik group list] AAG Admin. Office

by Marlon Cummings

Closed today due to project related business. ---------------- 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/

10 years, 5 months

[Aspuru-Guzik group list] In case you are interested...

by Alan Aspuru-Guzik

http://www.ncsa.illinois.edu/news/story/applications_now_being_accepted_for… 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

10 years, 5 months

[Aspuru-Guzik group list] ITAMP topical lunch discussion: Thursday November 14 @ 12:00

by tony.lee＠cfa.harvard.edu

Dear Friends, On Thursday, November 14, there will be an ITAMP topical lunch discussion. B-106 Conference Room @ CfA (60 Garden Street) NOTE: ALL FUTURE LUNCH DISCUSSIONS WILL BE HELD IN B-106. 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. Time: 12:00-1:30 As always pizza will be served. Speaker: Johannes Otterbach Title: Wigner-Crystallization of Single Photons in a Cold Rydberg Ensemble Abstract: The coupling of weak light fields to Rydberg states of atoms under conditions of electromagnetically induced transparency leads to the formation of Rydberg polaritons which are quasiparticles with tunable effective mass and nonlocal interactions. Confined to one spatial dimension their low energy physics is that of a moving-frame Luttinger liquid which, due to the nonlocal character of the repulsive interaction, can form a Wigner crystal of individual photons. In this talk I will review the basic principles of strongly interacting photons, leading to phenomena such as hard-sphere photons and bound two-photon states. Based on this I introduce a model to describe the low-energy, many-body properties of the system. Reformulating this theory in terms of a Luttinger liquid gives allows to estimate the physical parameters required to obtain quasi-crystalline long-range order. Using DMRG and approximation methods I show that under typical slow-light conditions kinetic energy contributions are too strong for crystal formation. However, adiabatically increasing the polariton mass by turning a light pulse into stationary spin excitations allows for the generation of true crystalline order over a finite length. The dynamics of this process and asymptotic correlations are analyzed in terms of a time-dependent Luttinger theory. Looking forward to seeing you there, Tony Lee

10 years, 5 months

[Aspuru-Guzik group list] Do you love mexican food??

by Adrian Jinich

Do you love having a boss (jefecito) who loves mexican food? Do you love performing quantum chemical simulations of molecular components of mexican food? Then come to this talk (by my cousin Pati, host of the PBS TV Show *Pati´s Mexican Table) *tomorrow at 5PM a few blocks away at the David Rockefeller Center for Latin American Studies. There will be free delicious cookies! [image: Inline image 1] Some people think there are 32 regional cuisines of Mexico, as many as the number of states in the country. Others say there are as many as delineated regions, many within a state. I, for one, consider, there are as many as one can possibly count, taking into consideration the marked historical periods, family legacies, smaller community culinary traditions. What?s more, these days, one has to look at the evolution of Mexican food outside of its national borders. Mexican communities that come from a particular region bring along culinary baggage that combines differently depending on where they settle. New regional cooking trends emerge. What?s more, for Mexicans who never crossed the border, but where the border crossed them (in the words from Los Tigres del Norte) their cooking evolved in peculiar ways as they became part of the United States. >From the infamous Tex-Mex Combo platter, to Fresh-Mex salads, to Cal-Mex Fish Tacos, to SoCal-Mex Burritos, to Chicago-French-Mex, to New-Mex and MEX-Tex, I find the movement of people and the evolution of their culture and cooking to be fascinating. Being Mexican, or eating Mexican, has become part of the American experience. Who considers salsa, nachos or guacamole ethnic these days? I invite you to come share with me many of the stories that have given shape to what Mexican food is considered today.

10 years, 5 months

← Newer
1
2
3
4
5
6
7
8
9
Older →

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

aspuru-list November 2013