Hi all,
Doran will speak at the group meeting today. See below for his title and abstract. The Toronto side will meet in SS571 at 2:30pm. If you would like to join the meeting, please send me you Skype information.
Best,
Riley
--------------------------------------------------
Title: Mesoscale quantum dynamics
Abstract: I will present an informal group meeting with a forward outlook on quantum dynamics projects in my future lab. I will mainly be discussing my perspective on the developing field of mesoscale quantum dynamics - the study of quantum effects influencing material properties arising on the 10-100 nm length scale. I will also present some (extremely) preliminary data showing a pathway towards numerically exact simulations of quantum dynamics incorporating >>1,000 degrees of freedom.
Xanadu is hiring quantum algorithms people with undergrad degrees - see
attached.
---------- Forwarded message ---------
From: Christian Weedbrook <christian(a)xanadu.ai>
Date: Mon, Apr 22, 2019 at 6:14 PM
Subject: Job recommendation
To: Aram Harrow <aram(a)mit.edu>
Hi Aram,
Hope you are doing well.
Do you have any recommendations of someone who would fit the attached
description?
Thanks!
--
Christian Weedbrook,
Founder/CEO
xanadu.ai
_______________________________________________
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http://mailman.mit.edu/mailman/listinfo/qip
Hi fellow A2G2-ers,
It's been a long PhD journey and now I'm gonna defend my thesis this
Thursday 25 2019 at 1:15-3:00 at the 60 Oxford St. 330 room, its one minute
away from Maxwell Dorkin and two from Chemistry. If you wanna hear about ML
and chemistry, come!
The invitation is last minute, it's also during the day, so no worries
about not coming.
Hope all is well
Ben
Harvard Quantum Initiative Special Seminar
Thursday, April 18
4:00 PM
Jefferson 250
Elie Wolfe (Perimeter Institute)
Quantum Nonlocality as a challenge to Classical Causality: How Bell’s Theorem is advancing Causal Inference and vice versa.
A signature example of the nonclassicality of quantum theory is codified in Bell's Theorem, which certifies the nonlocal correlations arising from product measurements on an entangled quantum state as defying any classical explanation. I'll interpret Bell's Theorem as a statement about the existence of nonclassical "common causes." By considering novel causal scenarios, beyond Bell scenarios, we gain insight into the fundamental quantum nature of cause and effect. I'll show how machine learning (causal discovery algorithms) are crashed by quantum statistics, and I'll discuss my own effort to separate quantum correlations from their classical counterparts in general causal structures. Our approach (unexpectedly) provides a complete solution for classical causal inference, thereby substantially advancing that statistical discipline. Finally, I'll explore quantifying genuinely multipartite entanglement by asking which sorts of quantum causal structures a given state could have arisen from. Based primarily on arXiv:1609.00672<https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_1609.006…>, though also drawing on arXiv:1707.06476<https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_1707.064…> and arXiv:1903.06311<https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_1903.063…>, as well as unpublished results.
--
Clare Ploucha
Administrative Program Manager
Max Planck/Harvard Research Center for Quantum Optics
Department of Physics
17 Oxford Street, Jefferson 357
Cambridge, MA 02138
P: 617-495-3388
Hi all,
Tim will give the group meeting presentation tomorrow. His title and abstract can be found below. The Toronto side will meet in SS571 at 2:30pm. If you would like to join the meeting via Skype, please send me you information.
Best,
Riley
-----------------------------------------------
Title: Automated discovery and steps towards implementation of 4-local couplers for superconducting qubits
Abstract: Interactions of more than two bodies simultaneously rarely appear in nature. Even in dense systems, forces usually act pairwise. However, n-local terms with n>3 frequently arise when mapping physical or mathematical problems to an Ising spin Hamiltonian. Superconducting flux qubits have emerged as a promising, versatile platform to simulate such spin systems and find their ground state, but the implementation of n-local superconducting qubit couplers has so far proven elusive. We have developed automated discovery software that intelligently searches the design space of superconducting circuits to fulfill desired spectral properties. After benchmarking the versatile software tool on well-known circuits, we have applied it to the design of 4-local couplers and found candidate circuits achieving up to several hundred MHz of coupling strength. In a second step, we have gained intuition for such couplers by invoking the physics of basic superconducting circuit building blocks. In this way, we were able to further tailor the circuit design towards a chip layout for experimental verification of the coupler properties. For future work, we propose experimental tests with successively larger numbers of qubits
another relevant talk
---------- Forwarded message ---------
From: Christina Andujar <candujar(a)mit.edu>
Date: Tue, Apr 16, 2019 at 10:17 PM
Subject: FW: April 24, 8pm - 2019 David M. Lee Historical Lecture in
Physics - Anton Zeilinger, "Quantum Information and Quantum Communication,
Foundations and Prospects"
To:
Begin forwarded message:
*From: *"Davis, Jolanta M." <jmdavis(a)fas.harvard.edu>
*Subject: April 24, 8pm - 2019 David M. Lee Historical Lecture in Physics -
Anton Zeilinger, "Quantum Information and Quantum Communication,
Foundations and Prospects"*
*Date: *April 16, 2019 at 3:54:19 PM EDT
*To: *"Davis, Jolanta M." <jmdavis(a)fas.harvard.edu>
*Please forward to your department faculty, students, and research scholars
this information about the 2019 David M. Lee Historical Lecture in Physics.*
In addition to the Lee Lecture mentioned below, on Thursday, April 25,
Professor Zeilinger will also present and speak about a film he had
commissioned, "Exile and Excellence: The Class of '38", which features 16
eminent Austrian-born US American and British scholars, who share their
life stories after they managed to escape Nazi persecution as children in
Austria. One of the scholars featured in the movie is Prof. Gerald Holton
from the Physics Department at Harvard University.
This event (on April 25) will be held at Harvard's Center for European
Studies (CES), at 4:30-6:00. For more information, please see:
https://ces.fas.harvard.edu/events/2019/04/austrian-academy-of-sciences---c…
David M. Lee Historical Lectures in Physics, sponsored by the Marvin and
Annette Lee Fund, are free and open to the public.
*April 24, 2019*
*8:00 pm*
*Jefferson Laboratories 250*
Physics Department
17 Oxford Street
Cambridge, MA
A dessert reception following the lecture will be held in Jefferson 450 –
Physics Department Library.
*Anton Zeilinger*
Vienna Center for Quantum Science and Technology, University of Vienna
Institute for Quantum Optics and Quantum Information, Austrian Academy of
Sciences
[image: cid:image001.jpg@01D4E55D.AEA16900]
*“Quantum Information and Quantum Communication, Foundations and Prospects”*
It is curious that the development of quantum physics – arguably the most
successful description of nature ever – was accompanied by fundamental
debates from the early days until today. Schrödinger’s cat, Einstein’s
“spooky action at a distance” and his comment that “God does not play dice
with the Universe” are deeply rooted in fundamental features of the theory:
superposition, entanglement and randomness. The concept of Quantum
Information encompasses these fundamental features. In the talk, I will
discuss some fundamental experiments. For example, in delayed-choice
entanglement swapping, the decision whether two photons which share no
common past are entangled or not can be made at the time when they already
have been detected. An interesting and very visual workhorse are orbital
angular momentum states of photons. They opened up the possibility for
higher-dimensional quantum experiments. That way, entanglement has been
confirmed for quantum numbers above 10.000 and between two more than
100-dimensional quantum states. In the talk, I will also mention recent
experiments in higher dimensions where the setup has been designed by the
computer program Melvin. Finally, a recent Cosmic Bell Test experiment will
be discussed, where the randomness is taken from fluctuations of light from
distant quasars. The talk will conclude with a most technical application,
the implementation of intercontinental quantum cryptography between Beijing
and Vienna via the Chinese quantum satellite Micius, and with The Big Bell
Test involving 100.000 participants providing independent input for 13
experiments on 5 continents.
_________
Jolanta M. Davis | Administrator to the Chair | Harvard University
| Department of Physics | 17 Oxford St., Jefferson 370 | Cambridge, MA
02138 | Tel.: 617-495-2866 | Fax: 617-495-0416 |
https://www.physics.harvard.edu/
_______________________________________________
qip mailing list
qip(a)mit.edu
http://mailman.mit.edu/mailman/listinfo/qip
Dear quanta,
Geoff Penington from Stanford is giving a talk today in the string/gravity
seminar <http://ctp.lns.mit.edu/seminars/seminars_gravity.html> today at
3pm in 6C-442. Details below.
Title: Entanglement Wedge Reconstruction and the Information Paradox
Abstract: Assuming only entanglement wedge reconstruction and general
relativity as an effective bulk field theory, we derive the Page curve and
the Hayden-Preskill decoding criterion, as well as various generalisations
thereof, from a purely bulk perspective in AdS/CFT. A key role is played by
the tools of approximate quantum error correction.
_______________________________________________
qip mailing list
qip(a)mit.edu
http://mailman.mit.edu/mailman/listinfo/qip
Harvard Quantum Initiative Special Seminar
Thursday, April 18
4:00 PM
Jefferson 250
Elie Wolfe (Perimeter Institute)
Quantum Nonlocality as a challenge to Classical Causality: How Bell’s Theorem is advancing Causal Inference and vice versa.
A signature example of the nonclassicality of quantum theory is codified in Bell's Theorem, which certifies the nonlocal correlations arising from product measurements on an entangled quantum state as defying any classical explanation. I'll interpret Bell's Theorem as a statement about the existence of nonclassical "common causes." By considering novel causal scenarios, beyond Bell scenarios, we gain insight into the fundamental quantum nature of cause and effect. I'll show how machine learning (causal discovery algorithms) are crashed by quantum statistics, and I'll discuss my own effort to separate quantum correlations from their classical counterparts in general causal structures. Our approach (unexpectedly) provides a complete solution for classical causal inference, thereby substantially advancing that statistical discipline. Finally, I'll explore quantifying genuinely multipartite entanglement by asking which sorts of quantum causal structures a given state could have arisen from. Based primarily on arXiv:1609.00672<https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_1609.006…>, though also drawing on arXiv:1707.06476<https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_1707.064…> and arXiv:1903.06311<https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_1903.063…>, as well as unpublished results.
--
Clare Ploucha
Administrative Program Manager
Max Planck/Harvard Research Center for Quantum Optics
Department of Physics
17 Oxford Street, Jefferson 357
Cambridge, MA 02138
P: 617-495-3388
Dear all,
Please see the attached announcement of a talk that may be of interest:
Fred Chong, University of Chicago
“Closing the Gap Between Quantum Algorithms and Machines with Hardware-Software Co-Design”
Friday, April 19, 2019
Maxwell Dworkin G125
3:00-4:00 p.m.
Light refreshments
--
Clare Ploucha
Administrative Program Manager
Max Planck/Harvard Research Center for Quantum Optics
Department of Physics
17 Oxford Street, Jefferson 357
Cambridge, MA 02138
P: 617-495-3388
Hello all,
Thi Ha will speak at tomorrow's group meeting. Title and abstract can be found below. The Toronto side will meet in SS571 at 2:30pm. Please let me know your Skype information if you would like to call in.
Best,
Riley
-------------------------------------------------
Title: Quantum simulation of superconducting qubit
Abstract: Without assuming any familiarity, the fundamentals of superconducting circuit will be outlined in the first half of the talk. In the second half, we will discuss some of the latest developments, in simulating an artificial two-level system that have been carried out in the Matter Lab.