ITAMP/HQOC Joint Quantum Sciences Seminar
Wednesday, March 21, 2018
4:00 PM, Jefferson 250
Prof. Markus Aspelmeyer, University of Vienna
“Quantum optomechanics with levitated solids: sensing, simulation and the gravity-quantum interface”
I will discuss our current experiments to achieve quantum optical control over motional states of levitated solids. This includes dielectric nanospheres coupled to Fabry-Perot cavities and nanophotonic structures, as well as micron-sized superconductors and magnets that will eventually be coupled to superconducting circuits. I will provide an overview of the status and challenges, and of the perspectives for such experiments for sensing, simulation and for novel tests of the interface between quantum physics and gravity.
Student Presentation by Richard Lee Liu will begin at 4:00
Guest Presentation will begin at 4:30 PM
Refreshments will be provided.
Samantha Dakoulas
Faculty Assistant to Professors Lukin & Greiner & their groups
Department of Physics
17 Oxford St., Lyman 324A
Cambridge, MA 02138
P. (617) 496-2544
*ITAMP Lunch Seminar*
*Speaker:* Shengtao Wang (Harvard University)
*Date:* Thursday, March 22nd
*Time:* 12:00-1:00 pm
Includes Pizza.
*Title: Quantum approximate optimization: performance and applications with
MaxCut and maximum independent set problems*
*Abstract: *The Quantum Approximate Optimization Algorithm (QAOA) is a
variational method proposed to find approximate solutions for combinatorial
optimization problems. However, finding the optimal variational parameters
becomes exponentially difficult as the depth p of the QAOA circuit
increases. We propose a systematic method to efficiently find
(quasi-)optimal variational parameters. Using our proposed approach, we
numerically benchmark the performance of QAOA on MaxCut and Maximum
Independent Set (MIS) problems up to p≤50. We find that while QAOA
generically behaves similarly to quantum adiabatic algorithm (QAA), it can
outperform QAA by multiple orders of magnitude in computation time for hard
problem instances. We also discuss how the MIS problem can be naturally
implemented using systems of trapped Rydberg atoms.
*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, B-106 will be
at the end of the hallway on the left side.
---------- Forwarded message ---------
From: Dave Bacon <dabacon(a)google.com>
Date: Fri, Mar 16, 2018 at 3:57 PM
Subject: Cirq
To: Dr. Michael Marthaler <marthaler(a)qorrection.de>, <
andreas.hintennach(a)daimler.com>, <gustav.boehm(a)daimler.com>, <
markus.leder(a)daimler.com>, Joseph Lykken <lykken(a)fnal.gov>, Panagiotis
Spentzouris <spentz(a)fnal.gov>, James B Kowalkowski <jbk(a)fnal.gov>, James
Amundson <jfamundson(a)gmail.com>, Alexandru Macridin <macridin(a)fnal.gov>,
Neukart, Dr. Florian <Florian.Neukart(a)vw.com>, Von Dollen, David <
extern.David.VonDollen(a)audi.com>, Alekseyenko, Alex <
extern.Alex.Alekseyenko(a)audi.com>, Bert de Jong <Wadejong(a)lbl.gov>, Alan
Aspuru-Guzik <alan(a)aspuru.com>, aspuru.staff <aspuru.staff(a)gmail.com>,
Norman Yao <norman.yao(a)gmail.com>, Cao, Yudong <yudongcao(a)fas.harvard.edu>,
Eleanor G. Rieffel <eleanor.g.rieffel(a)nasa.gov>, Davide Venturelli
(affiliate) <davide.venturelli(a)nasa.gov>, Christopher Cantwell <
ccantwel(a)usc.edu>
CC: Alan Ho <alankho(a)google.com>, Craig Gidney <craiggidney(a)google.com>
*Dear Quantum Partners, We are happy to let you know that a preliminary
version of our platform for building, optimizing, and running quantum
circuits, Cirq, is now available for testing!WhatCirq is an open-source
Python framework for writing quantum programs. Right now it runs against a
local classical simulator, but in the future it will be hooked up to
Google’s quantum cloud service to run against our honest-to-goodness
quantum computers (and also classical simulators running on Google
infrastructure).WhereCirq is currently in a private github repo:
https://github.com/quantumlib/cirq <https://github.com/quantumlib/cirq> If
you have previously given us your github id, then you should have received
an invitation to access this repo. Please note that we require 2 factor
authorization be turned on for your github account (see
https://help.github.com/articles/securing-your-account-with-two-factor-auth…
<https://help.github.com/articles/securing-your-account-with-two-factor-auth…>
for how to enable 2 factor authorization). If you have more github
accounts that need to be added, please email dabacon(a)google.com
<dabacon(a)google.com> with these requests. Some of you requested github ids
for team members not on this email thread, please feel free to share this
email with them.HowTo get up and running with Cirq, the following documents
will be useful: - Installation instructions
<https://github.com/quantumlib/cirq/blob/master/cirq/docs/install.md>-
Documentation
<https://github.com/quantumlib/cirq/blob/master/cirq/docs/table_of_contents.…>Bugs,
Feedback, and ContributionsWe want your feedback! For bugs, questions,
feature requests, complaints, suggestions, or other feedback, please use
https://github.com/quantumlib/cirq/issues
<https://github.com/quantumlib/cirq/issues>. If there is a comment you
want to make that you’d rather not share publicly on github, please send
these to dabacon(a)google.com <dabacon(a)google.com> or alankho(a)google.com
<alankho(a)google.com>. We also welcome contributions. Instructions for
contributing code can be found at
https://github.com/quantumlib/Cirq/blob/master/CONTRIBUTING.md
<https://github.com/quantumlib/Cirq/blob/master/CONTRIBUTING.md> Note that
you will need to sign the CLA to contribute, please consult with your
employer about signing the CLA before you sign. Also note that we have a
code review process, if you are thinking of a major change or change that
significantly changes the interface we recommend filing an issue first to
ensure that this change is going to not be killed during code review.Note
that Cirq is still under very active development and is not yet to an alpha
version. We will be making breaking changes, especially as a result of
feedback we receive from you. ConfidentialityPlease keep the contents of
Cirq confidential. Only you can prevent the spread of quantum hype! Thank
you for your patience in waiting for us to get Cirq to you. We look
forward to getting feedback from you on Cirq, please don’t be shy in
sharing your opinions!Thanks,The Quantum Cloud Team*
--
Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology
Harvard University | 12 Oxford Street, Room M138 | Cambridge, MA 02138
(617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru
Dear quanta,
We will meet (minus me) this Friday. Fred Shultz will speak about finding
decompositions of separable states.
-aram
_______________________________________________
qip mailing list
qip(a)mit.edu
http://mailman.mit.edu/mailman/listinfo/qip
Everyone,
We just got the notice that University Central Offices, FAS, and CCB will
close tomorrow due to the snowstorm. Felix and I expect to be back in the
office on Wednesday, March 14th.
Snowday 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>*
*ITAMP Lunch Seminar*
*Speaker: *Mariusz Pawlak (Nicolaus Copernicus University)
*Date:* Thursday, March 15
*Time:* 12:00-1:00 pm
Includes Pizza.
*Title: *Adiabatic variational theory for anisotropic atom−diatom
collisions at very low temperatures
*Abstract: *We recently developed an adiabatic variational theory for
low-energy collisions between atoms and diatomic molecules [1,2]. Our
approach reduces the dimensionality of the Hamiltonian under consideration
without losing essential physics and significantly enhances the
computational efficiency. The five degrees of freedom problem, where the
bond length in the diatomic molecule is kept fixed, is replaced with a set
of uncoupled one-dimensional subproblems. As an illustrative numerical
example, the theory has been applied to calculate the Penning ionization
reaction rate of the excited metastable helium atom and the molecular
hydrogen for both configurations: para and ortho. The results are in very
good agreement with the latest experimental findings [3].
[1] M. Pawlak, Y. Shagam, E. Narevicius, N. Moiseyev, J. Chem. Phys. 143,
074114 (2015).
[2] M. Pawlak, Y. Shagam, A. Klein, E. Narevicius, N. Moiseyev, J. Phys.
Chem. A 121, 2194 (2017).
[3] A. Klein, Y. Shagam, W. Skomorowski, P. S. Zuchowski, M. Pawlak, L. M.
C. Janssen, N. Moiseyev, S. Y. T. van de Meerakker, A. van der Avoird, C.
P. Koch, E. Narevicius, Nature Phys. 13, 35 (2017).
*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, B-106 will be
at the end of the hallway on the left side.
Hi everyone,
Prof. Ignacio Franco from the University of Rochester (
https://www.chem.rochester.edu/groups/franco/) will be visiting Harvard
this Thursday (*March 15*) for THEOCHEM. The work of his group focuses on
studying Laser control of electrons, Mechanical manipulation of
single-molecule junctions and Quantum Dynamics.
If you want to meet Prof. Franco and/or have lunch or dinner with him,
please let me know. I will send the abstract of his talk soon (His talk is
this
Wednesday at MIT, 4:15pm, as usual).
Cheers,
Ben
Dear All,
Next Monday (March 12th) we will have a postdoc candidate, Dr. Si Yue Guo visiting from University of Toronto. She will give a talk at 3PM in the division room. Please see attached for her title and abstract.
In addition, if you would like to meet with her please feel free to sign up in this Google doc<https://docs.google.com/document/d/1AwCy1MWFyBtbqnH0xJvuSOOrPaIsyoR09nQnPPZ…>. If you have any questions please let me know.
Best,
Yudong