February 2024 - Qse-grad-students

[QMatter in Math/Physics Feb 9, Fri 9:30 - 11 am ET] Soonwon Choi (MIT) Quantum Algorithms to Recognize Phases of Matter and Exactly Solvable 2D Models with Anomalous Entanglement Entropy - Harvard CMSA G10

by Juven Wang

Quantum Matter in Mathematics and Physics! https://cmsa.fas.harvard.edu/events-archive/category/quantum-matter-seminar/ Let us warmly welcome Prof. Soonwon Choi (MIT). ----- Time: Friday 9:30 - 11 am ET, Feb 9 Location: Harvard CMSA G10 Zoom: https://harvard.zoom.us/j/977347126 Password: cmsa ————————————————————————————————— *Soonwon Choi (MIT)* Title: Quantum Algorithms to Recognize Phases of Matter and Exactly Solvable 2D Models with Anomalous Entanglement Entropy Abstract: In this talk, I will report my two recent results at the intersection of quantum information and strongly interacting phases of matters. In the first half of the talk, we describe exact quantum algorithms that recognize a class of 1D gapped phases, namely symmetry protected topological phases or spontaneous symmetry breaking phases protected by abelian internal symmetry. The key idea is to observe the conceptual similarity between renormalization group (RG) flow and error correction, and to implement the latter as unitary circuits emulating the RG flow. Our algorithm guarantees faithful recognition of a target phase with a small number of input quantum state samples. In the second half, we present a class of 2D Hamiltonians, where the exact ground state wavefunctions can be exactly evaluated and shown to exhibit anomalous entanglement properties. One class of our models exhibit area-law scaling entanglement entropy, but this is mostly due to non-local correlation: one finds that the topological entanglement entropy also scales with the size of subsystem choices. By making simple modifications, we can also devise 2D models with volume-law scaling bipartite entanglement entropy. Our results can be understood as a generation of the 1D Motzkin model to 2D systems. Based on: Work done with Ethan Lake and Shankar Balasubramanian https://arxiv.org/abs/2211.09803 https://arxiv.org/abs/2305.07028 --- Harvard University CMSA, 20 Garden Street, Cambridge, MA 02138

3 months, 1 week

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[Harvard-quantum-initiative] FW: CQIQC Conference at the Fields, August 2024

by Harvard Quantum Initiative

Please see below for an announcement that may be of interest to the HQI Community. From: Quantum Centre <quantum(a)utoronto.ca> Date: Tuesday, February 6, 2024 at 3:39 PM To: Chemistry Communications <chem.comms(a)utoronto.ca> Subject: CQIQC Conference at the Fields, August 2024 Hello! I am writing in my capacity as Communications Officer for the Center for Quantum Information and Quantum Control (CQIQC) at the University of Toronto, where we and the Fields Institute for Research in Mathematical Sciences are deep into planning the 2024 iteration of the CQIQC conference. Scheduled for August 26-30, this gathering will continue the tradition of highlighting excellence and innovation in quantum research, as well as fostering collaboration within the quantum community worldwide. The full list of speakers is available on the conference website<http://www.fields.utoronto.ca/activities/24-25/CQIQC>. We are reaching out to you in hopes that you will help us spread the word about the upcoming meeting. In addition to the invited speakers, we incorporate a range of contributed talks and posters, many delivered by junior scientists, PDFs and graduate students. The abstract submission for contributed talks and posters<https://survey.alchemer.com/s3/7408116/CQIQC-X-abstract-submission> is now live on our site; conference registration will open in March. NOTE: We have extended the deadline for abstract submissions to February 25th at 11:59 p.m. We would be grateful if you could reach out to your members and students, pointing out the call for abstracts. Thank you for your help, and please let us know if you have any questions. ALYX DELLAMONICA (they/them) Communications Officer CQIQC University of Toronto 80 St George Street, Rm 151 Toronto, Ontario, M5S 3H6 Office: 416-978-1630 chem.comms(a)utoronto.ca<mailto:chem.comms@utoronto.ca> chemistry.utoronto.ca<https://www.chemistry.utoronto.ca/> [2Q==] _______________________________________________ Harvard-quantum-initiative mailing list -- harvard-quantum-initiative(a)lists.fas.harvard.edu To unsubscribe send an email to harvard-quantum-initiative-leave(a)lists.fas.harvard.edu

3 months, 1 week

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[QMatter Math/Phys Feb 6th, Tue 4 - 5:30 pm] Yuta Hamada (KEK) - Flavor hierarchy from smooth confinement & Towards a complete classification of 6d supergravities - Harvard CMSA G10

by Juven Wang

Let us warmly welcome Prof. Yuta Hamada (KEK, Tsukuba) in person (who is also visiting the Swampland Program)! https://cmsa.fas.harvard.edu/series/quantum-matter-in-mathematics-and-physi… ----- Time: Tue 4 pm - 5:30 pm ET, Feb 6 Location: Harvard CMSA G10 Zoom: https://harvard.zoom.us/j/977347126 Password: cmsa ————————————————————————————————— Yuta Hamada (KEK, Tsukuba) Title: Flavor hierarchy from smooth confinement & Towards a complete classification of 6d supergravities Abstract: The talk consists of two independent parts. In the first part, I will talk about a new model to explain the Standard Model flavor hierarchy. Our model is based on explicit smooth confinement. The smallness of the first- and second-family fermion masses is explained by the exponential hierarchy via dimensional transmutation. In the second part, I will talk about a classification of 6D supergravities. We make progress towards a complete classification of 6D supergravities with minimal supersymmetry and non-abelian gauge group. -------- Subscribe to Harvard CMSA Quantum Matter and other seminar videos (more to be uploaded): https://www.youtube.com/playlist?list=PL0NRmB0fnLJQAnYwkpt9PN2PBKx4rvdup Subscribe to Harvard CMSA seminar mailing list: https://forms.gle/1ewa7KeP6BxBuBeRA --- Harvard University CMSA, 20 Garden Street, Cambridge, MA 02138

3 months, 1 week

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Note about QSE journal club

by Sule, Nishant V.

Dear all, I don’t know about you, but to me it feels like a lot is already happening in this semester. I hope yours is off to a good start! I am writing to suggest a small change to the QSE journal club with the intention of making it easier and better for everyone. In order to increase interactions between all QSE students as well as a stronger community between the cohorts, we think that it would help if the QSE journal club were to be co-led by both the G1 and G2 cohorts. Not only will this help share the organizational burden but will hopefully also initiate more interactions between your cohorts. We leave the organizational details for you all to decide, but some potential options to consider are, say a.) each cohort collectively takes turns in leading the weekly discussion, or b.) two new volunteers (one G1 and one G2) together lead the club each week, or perhaps c.) each cohort (G1 and G2) appoints their club QSE czar who take charge and organize through out the semester. Of course you are welcome to find your own creative solutions. (Notice how I have subtly made the transition from QSE journal club to club QSE :). This is to say that perhaps you may want to think broader and not limit yourselves to discussions of journal papers in these meetings. Maybe you are already going beyond papers… as some of you have heard Evelyn and me mention this in the previous QSE301– as long as these discussions benefit your academic journey in QSE, you should feel free to explore the ideas, topics, themes etc. that you all find engaging. You can also invite individuals in the broader HQI community to interact with you in these settings.) If there are any questions or if any of you would like to chat about this in more detail or anything else on your mind, please don’t hesitate to reach out. Best, Nishant

3 months, 1 week

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[Harvard-quantum-initiative] FW: Reminder: 2024 Dalgarno Memorial Lectures - Prof. Jun Ye (JILA)

by Harvard Quantum Initiative

Please see below for a talk series that may be of interest to the HQI Community From: "Donahue, Jaclyn" <jaclyn.donahue(a)cfa.harvard.edu> Date: Friday, February 2, 2024 at 2:00 PM Subject: Reminder: 2024 Dalgarno Memorial Lectures - Prof. Jun Ye (JILA) Dear Everyone: I am sending a friendly reminder about the 2024 Dalgarno Memorial Lectures given by Prof. Jun Ye (JILA) next week. with regards, Jaclyn Dalgarno Memorial Lectures (https://lweb.cfa.harvard.edu/itamp-lectures/dalgarno-memorial-lectures) 4:30 pm Monday February 5 - Physics Colloquium, Jefferson 250 Celebrating Dalgarno’s Serendipitous Journey – Building atomic clocks for fundamental physics 1:30 pm Tuesday February 6 - Center for Astrophysics Colloquium, Phillips Auditorium Quantum degenerate gas of polar molecules 10:00 am Thursday February 8 - 301 Pierce Hall Molecules under new light -- Jaclyn Donahue Administrative Coordinator The Institute for Theoretical Atomic, Molecular and Optical Physics 60 Garden Street, MS 14 Cambridge MA 02138 617-495-9524 | http://www.cfa.harvard.edu/itamp/ -- You received this message because you are subscribed to the Google Groups "itampannounce" group. To unsubscribe from this group and stop receiving emails from it, send an email to itampannounce+unsubscribe(a)cfa.harvard.edu<mailto:itampannounce+unsubscribe@cfa.harvard.edu>. To view this discussion on the web visit https://groups.google.com/a/cfa.harvard.edu/d/msgid/itampannounce/CAKVYK6xJ…<https://groups.google.com/a/cfa.harvard.edu/d/msgid/itampannounce/CAKVYK6xJ…>. For more options, visit https://groups.google.com/a/cfa.harvard.edu/d/optout. _______________________________________________ Harvard-quantum-initiative mailing list -- harvard-quantum-initiative(a)lists.fas.harvard.edu To unsubscribe send an email to harvard-quantum-initiative-leave(a)lists.fas.harvard.edu

3 months, 2 weeks

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[QMatter in Math/Physics Feb 2, Fri 10 - 11:30 am ET] Anurag Anshu (Harvard) Quantum Circuits to local Hamiltonian: role in quantum complexity and new constructions - Harvard CMSA G10

by Juven Wang

Let us warmly welcome Prof. Anurag Anshu (Harvard) in person! https://cmsa.fas.harvard.edu/series/quantum-matter-in-mathematics-and-physi… ----- *Time: Friday 10:00 - 11:30 am ET, Feb 2 * *Location: Harvard CMSA G10* Zoom: https://harvard.zoom.us/j/977347126 Password: cmsa ————————————————————————————————— *Anurag Anshu (Harvard)* Title: *Quantum Circuits to local Hamiltonian: role in quantum complexity and new constructions * Abstract: At the heart of the theory of NP completeness lies a mapping from classical circuits to constraint satisfaction problems (classical local Hamiltonians). The quantum analogue of this is the remarkable history state construction of Kitaev (building upon Feynman's work). This (whiteboard) talk will provide an introduction to this mapping and its crucial role in bridging quantum computer science and quantum many-body physics research. Then, we will describe a new mapping using tensor networks and quantum fault tolerance (https://arxiv.org/abs/2309.16475). Time permitting, we will discuss the relevance of this mapping to the quantum PCP conjecture. -------- Subscribe to Harvard CMSA Quantum Matter and other seminar videos (more to be uploaded): https://www.youtube.com/playlist?list=PL0NRmB0fnLJQAnYwkpt9PN2PBKx4rvdup Subscribe to Harvard CMSA seminar mailing list: https://forms.gle/1ewa7KeP6BxBuBeRA --- Harvard University CMSA, 20 Garden Street, Cambridge, MA 02138

3 months, 2 weeks

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Qse-grad-students February 2024