aspuru-list August 2018

aspuru-list@lists.fas.harvard.edu

8 participants
19 discussions

[Aspuru-Guzik Group List] Group meeting, Thu Aug 09, 3:30 PM, Div Room

by Ian Kivlichan

Hi all, Tomorrow Flo will speak at group meeting. See below for his title and abstract! All the best, Ian ----------------- Chimera: enabling hierarchy based multi-objective optimization for self-driving laboratories Finding the ideal conditions for experimental procedures or engineering problems is a challenging decision-making process which requires significant time and resources. Additional complexity arises for tasks involving multiple objectives to be optimized simultaneously. In this talk I will present Chimera, an approach to multi-objective optimization in scenarios where condition evaluations are costly and little is known about the shapes of the objectives. Chimera enables various optimization algorithms to reliably locate ideal conditions with only a few condition evaluations. I will highlight the applicability of Chimera on two different examples: the auto-calibration of a robotic sampling sequence for direct-injection and the inverse-design of a four-pigment excitonic model system.

5 years, 9 months

[Aspuru-Guzik Group List] FW: ITAMP Workshop "Quantum Phases of Fermions in Optical Lattices: The Low-Temperature Frontier"

by Dakoulas, Samantha R

Dear All: We hope you can participate at the ITAMP workshop on "Quantum Phases of Fermions in Optical Lattices: The Low-Temperature Frontier" to be held at Phillips Auditorium at 60 Garden St. on October 8-10, 2018. The schedule of the workshop is on the ITAMP website: https://www.cfa.harvard.edu/itamp-event/quantum-phases-fermions-optical-lat… There will be a poster session. We invite you to bring a poster. If you are planning to do so, please email ntariri(a)cfa.harvard.edu<mailto:ntariri@cfa.harvard.edu>. Note: There is no registration fee for the local participants, but for us to account for the number of attendees, we ask you to visit and click on the Registration link. Please choose the "payment by check" option, and pick a random check number so that you can complete the registration process. We look forward to seeing you soon at ITAMP. 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

5 years, 9 months

[Aspuru-Guzik Group List] Special ITAMP lunch seminar - Arghavan Safavi, JILA (August 9th)

by Zolfaghari Jooya, Hossein

*Special ITAMP Lunch Seminar* *Speaker: * Arghavan Safavi (JILA, NIST and University of Colorado) *Date:* Thursday, August 9th *Time:* 12:00-1:00 pm Includes Pizza. *Title:* *Entanglement dynamics and scrambling in a trapped-ion quantum simulator of the Dicke model * *Abstract: *When quantum information "scrambles", information initially stored in the local degrees of freedom of a quantum many-body system spreads over its many-body degrees of freedom, becoming inaccessible to local probes and thus apparently lost. Scrambling and entanglement are considered key concepts that reconcile seemingly antithetical behaviors including thermalization of isolated quantum systems and information loss in black holes. Moreover, these two concepts have revolutionized our understanding of non-equilibrium phenomena. I will show that a specific family of fidelity out-of-time-order correlators (FOTOCs), recently measured in a trapped-ion quantum simulator via time reversal of the many-body dynamics followed by a fidelity measurement, can serve as a unifying diagnostic tool that elucidates the intrinsic connection between fast scrambling, volume law entanglement, ergodicity, quantum chaos, and the associated butterfly effect in the semiclassical dynamics of the system. I will demonstrate the utility of the FOTOCs using the Dicke model which has been recently benchmarked in a 2d trapped-ion quantum simulator. *Location: *B-106 @ Center for Astrophysics (60 Garden Street <https://maps.google.com/?q=60+Garden+Street&entry=gmail&source=g>) *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.

5 years, 9 months

[Aspuru-Guzik Group List] [qip] *talk today* Professor Stephanie Wehner, QuTech, Delft University of Technology, Monday, August 6, 2018 4-5 PM, Haus Room, 36-428

by Aram Harrow

Special OQE Seminar Monday, August 6th 4-5 PM, Haus Room, 36-428 Professor Stephanie Wehner QuTech, Delft University of Technology Abtract: Towards a network stack for quantum networks In order to realize quantum networks that can support useful applications it desirable to develop a network stack to enable reliable communication and control. Such a stack could in principle be subdivided into a number of layers similar to the classical TCP/IP stack, or OSI model. The special features of qubits (and quantum entanglement), however, introduce entirely new design challenges that are not captured by any existing model or protocol suite. Here we present initial work towards designing such a stack. In this talk, we will in particular focus on presenting a link layer protocol, which uses a class of well known heralded entanglement generation schemes that have been realized in experiment at the physical layer. We proceed to introduce the first discrete event simulator for quantum networks - NetSquid - and use it to investigate the performance of the link layer protocol as an example. We present initial simulation results for the link layer protocol based on a system using NV centers in diamond, for a lab setup as well as the planned test link from Delft to The Hague. bio: Stephanie Wehner works as Antoni van Leeuwenhoek Professor at QuTech, Delft University of Technology. Her passion is communication in all its facets, and she has written numerous scientific articles in both physics and computer science. Stephanie is one the founders of QCRYPT, which has become the largest conference in quantum cryptography. She is Roadmap Leader of the Quantum Internet and Network Computing efforts at QuTech, and is the coordinator of the european Quantum Internet Alliance. From 2010 to 2014, her research group was located at the Centre for Quantum Technologies, National University of Singapore, where she was first Assistant and later Dean's Chair Associate Professor. Previously, she was a postdoctoral scholar at the California Institute of Technology in the group of John Preskill. In a former life, she worked in the classical internet industry and as a professional hacker. For a full listing of this semester’s colloquia or to subscribe to the mailing list, please visit www.rle.mit.edu/oqesem _______________________________________________ OQE mailing list OQE(a)mit.edu http://mailman.mit.edu/mailman/listinfo/oqe _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

5 years, 9 months

[Aspuru-Guzik Group List] [qip] Special Seminar: Axel Dahlberg, QuTech: "Transforming graphs states using single-qubit operations". Tuesday, Haus Room, 36-428

by Dirk Englund

Dr. Axel Dahlberg, QuTech, Delft: "Transforming graphs states using single-qubit operations" Tuesday, August 7, Haus Room, 36-428 4:00-5:00PM Abstract: Graph states are ubiquitous in quantum information with diverse applications ranging from quantum network protocols to measurement based quantum computing. Here we consider the question whether one graph (source) state can be transformed into another graph (target) state, using a specific set of quantum operations (LC+LPM+CC): single-qubit Clifford operations (LC), single-qubit Pauli measurements (LPM) and classical communication (CC) between sites holding the individual qubits. We first show that deciding whether a graph state |G> can be transformed into another graph state |G'> using LC+LPM+CC is NP-Complete, even if |G'> is restricted to be a GHZ-state. However, we also provide efficient algorithms for two situations of practical interest: 1. |G> has Schmidt-rank width one and |G'> is a GHZ-state. The Schmidt-rank width is an entanglement measure of quantum states, meaning this algorithm is efficient if the original state has little entanglement. Our algorithm has runtime O(|V(G')||V(G)|^3), and is also efficient in practice even on small instances as further showcased by a freely available software implementation. 2. |G> is in a certain class of states with unbounded Schmidt-rank width, and |G'> is a GHZ-state of a constant size. Here the runtime is O(poly(|V(G)|)), showing that more efficient algorithms can in principle be found even for states holding a large amount of entanglement, as long as the output state has constant size. Our results make use of the insight that deciding whether a graph state |G> can be transformed to another graph state |G'> is equivalent to a known decision problem in graph theory, namely the problem of deciding whether a graph G' is a vertex-minor of a graph G. Many of the technical tools developed to obtain our results may be of independent interest. -- Dirk R. Englund Associate Professor of Electrical Engineering and Computer Science Massachusetts Institute of Technology 77 Massachusetts Avenue, Room 36-591 englund(a)mit.edu; (617) 324-7014; http://qplab.mit.edu _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

5 years, 9 months

[Aspuru-Guzik Group List] [qip] Fwd: Invitation to meet with Special OQE Seminar: Professor Stephanie Wehner, QuTech, Delft University of Technology

by Dirk Englund

Dear All, Prof. Wehner from QuTech will be giving a talk tomorrow, Monday, at 4-5PM entitled "Towards a network stack for quantum networks." She will be at MIT Monday-Friday. If you'd like to meet, please sign up here <https://docs.google.com/spreadsheets/d/16AXVcRQfRz9iS9IagHH-TG4nHvxkHNyr1Sp…> ? Also, Dr. Axel Dahlberg from QuTec gives a talk on Tuesday in the Haus room, 4-5PM, on the topic of "Transforming graphs states using single-qubit operations". Best regards, Dirk ---------- Forwarded message --------- From: Janice L Balzer <balzer(a)mit.edu> Date: Fri, Aug 3, 2018 at 5:08 PM Subject: Invitation to meet with Special OQE Seminar: Professor Stephanie Wehner, QuTech, Delft University of Technology To: oqe-fac <oqe-fac(a)mit.edu> Professor Stephanie Wehner will be giving a special OQE Seminar on Monday (details below). If you are interested in meeting with her, please indicate so on her schedule which can be found here <https://docs.google.com/spreadsheets/d/16AXVcRQfRz9iS9IagHH-TG4nHvxkHNyr1Sp…> . [image: image001.png] Special OQE Seminar Monday, August 6th 4-5 PM, Haus Room, 36-428 Professor Stephanie Wehner QuTech, Delft University of Technology Abtract: Towards a network stack for quantum networks In order to realize quantum networks that can support useful applications it desirable to develop a network stack to enable reliable communication and control. Such a stack could in principle be subdivided into a number of layers similar to the classical TCP/IP stack, or OSI model. The special features of qubits (and quantum entanglement), however, introduce entirely new design challenges that are not captured by any existing model or protocol suite. Here we present initial work towards designing such a stack. In this talk, we will in particular focus on presenting a link layer protocol, which uses a class of well known heralded entanglement generation schemes that have been realized in experiment at the physical layer. We proceed to introduce the first discrete event simulator for quantum networks - NetSquid - and use it to investigate the performance of the link layer protocol as an example. We present initial simulation results for the link layer protocol based on a system using NV centers in diamond, for a lab setup as well as the planned test link from Delft to The Hague. bio: Stephanie Wehner works as Antoni van Leeuwenhoek Professor at QuTech, Delft University of Technology. Her passion is communication in all its facets, and she has written numerous scientific articles in both physics and computer science. Stephanie is one the founders of QCRYPT, which has become the largest conference in quantum cryptography. She is Roadmap Leader of the Quantum Internet and Network Computing efforts at QuTech, and is the coordinator of the european Quantum Internet Alliance. From 2010 to 2014, her research group was located at the Centre for Quantum Technologies, National University of Singapore, where she was first Assistant and later Dean's Chair Associate Professor. Previously, she was a postdoctoral scholar at the California Institute of Technology in the group of John Preskill. In a former life, she worked in the classical internet industry and as a professional hacker. For a full listing of this semester’s colloquia or to subscribe to the mailing list, please visit www.rle.mit.edu/oqesem -- You received this message because you are subscribed to the Google Groups "MIT Quantum Photonics" group. To unsubscribe from this group and stop receiving emails from it, send an email to QP-mit+unsubscribe(a)googlegroups.com. To post to this group, send email to QP-mit(a)googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/QP-mit/B23F31EA93341940A25C8F445C5ADCF6FA… <https://groups.google.com/d/msgid/QP-mit/B23F31EA93341940A25C8F445C5ADCF6FA…> . For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "MIT Quantum Photonics" group. To unsubscribe from this group and stop receiving emails from it, send an email to QP-mit+unsubscribe(a)googlegroups.com. To post to this group, send email to QP-mit(a)googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/QP-mit/B23F31EA93341940A25C8F445C5ADCF6FA… <https://groups.google.com/d/msgid/QP-mit/B23F31EA93341940A25C8F445C5ADCF6FA…> . For more options, visit https://groups.google.com/d/optout. -- Dirk R. Englund Associate Professor of Electrical Engineering and Computer Science Massachusetts Institute of Technology 77 Massachusetts Avenue, Room 36-591 englund(a)mit.edu; (617) 324-7014; http://qplab.mit.edu _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

5 years, 9 months

[Aspuru-Guzik Group List] Group meeting, Thu Aug 02, 3:30 PM, Div Room

by Ian Kivlichan

Hi all, Tomorrow Tere will speak at group meeting. See below for her title and abstract! All the best, Ian ----------------- Simulation of light harvesting systems: Towards a 100PFs computation Abstract: In this talk, I will present a possible approach to model the exciton dynamics of large protein complexes and aggregates of them, by a high-performance implementation of the method HOPS (Hierarchy of Stochastic Pure States). We will discuss the challenges in the understanding the light harvesting mechanisms on biological systems. I will briefly review the status of previous approaches. Finally, I will present an analysis of the potential use a HOPS to model large portions of light-harvesting systems in a supercomputer.

5 years, 9 months

[Aspuru-Guzik Group List] Fwd: Hirschfelder Postdoctoral Fellowship

by Alan Aspuru-Guzik

Alán Aspuru-Guzik Professor of Chemistry and Computer Science | Vector Institute Canada 150 Research Chair in Quantum Chemistry | CIFAR Senior Fellow University of Toronto | 80 St George St | Toronto, ON M5S 3H6, Canada http://matter.toronto.edu Twitter @A_Aspuru_Guzik aspuru(a)utoronto.ca ---------- Forwarded message ---------- From: J.R. SCHMIDT <schmidt(a)chem.wisc.edu> Date: Wed, Aug 1, 2018 at 4:42 PM Subject: Hirschfelder Postdoctoral Fellowship To: "alan(a)aspuru.com" <alan(a)aspuru.com> Dear Professor Aspuru-Guzik, The Theoretical Chemistry Institute at the University of Wisconsin-Madison is now accepting nominations for a Hirschfelder Postdoctoral Fellow. The Fellowship offers the opportunity for an extremely well-qualified recent Ph.D. graduate to pursue a combination of independent and collaborative research within the Institute and beyond. The Fellow will be provided with a salary of $50,000 and a comprehensive benefits package. Additional research funds of up to $5,000 per year are available to support the Fellow's research. The initial appointment is for a period of 12 months and is renewable for a 2nd year. Starting date is negotiable but must commence prior to June 1, 2019. Interested candidates should arrange for a *single* letter of nomination to be submitted via email (hirschfelder.fellowship(a)gmail.com) prior to 9/15/18; self-nominations are not accepted. Sincerely, J.R. Schmidt ------------------------------------------ J.R. Schmidt Professor of Chemistry Room 8305D Department of Chemistry University of Wisconsin-Madison 1101 University Ave <https://maps.google.com/?q=1101+University+Ave+%0D%0A+%0D%0AMadison,+WI+537…> Madison, WI 53706 Phone: (608) 262-2996 Fax: (608) 262-9918 E-mail: schmidt(a)chem.wisc.edu http://www.chem.wisc.edu/users/schmidt

5 years, 9 months

[Aspuru-Guzik Group List] [qip] Fwd: 2018 Bosonic Quantum Chemistry Workshop

by Aram Harrow

Dear quanta, See below for a conference announcement featuring Seth and other speakers. The topic is "bosonic quantum computing" and note that they have registered the URL https://www.bosonicquantumchemistry.com/ -aram ---------------- Christian Weedbrook, Joonsuk Huh, and Raúl García-Patrón are organizing a workshop on “Quantum Bosonic Chemistry” in Toronto on August 27th-29th, this year. In this event, scientists from the fields of quantum information and theoretical chemistry will be gathered to discuss topics of quantum chemistry where bosonic modes play a relevant role and its interplay with quantum simulation and computation algorithms. Relevant players in the field of chemistry and quantum information have already committed to participate in this event, such as Seth Lloyd, Alán Aspuru-Guzik, Fabrizio Santoro, and Ove Christiansen. Event website: https://www.bosonicquantumchemistry.com/ Should you have any questions, do not hesitate to contact Ranier Sandoval – ranier(a)xanadu.ai Xanadu www.xanadu.ai 372 Richmond Street W, Suite 306, Toronto, ON <https://maps.google.com/?q=372+Richmond+Street+W,+Suite+306,+Toronto,+ON&en…> +1(416) 304-9629 _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

5 years, 9 months

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

aspuru-list August 2018