Dear All,
The Physics 15c poster session is starting at 4:30 today in Science Center
306. Everyone is cordially invited. Food will be served. I hope to see
you there.
Mara
--
Professor of Physics
Harvard University
17 Oxford Street
Cambridge, MA 02138
If you are doing research through Phys 90r this semester, this google form replaces the old paper form:
https://forms.gle/YgQhmxz4f54CvAT8A
Please fill this out as soon as your 90r research plan is settled. This is just an internal physics form, so don’t forget to officially sign up for 90r in your crimson cart. Let me know if you have any questions.
This email is a reminder about the Physics Department's rule for the 15b and 15c labs, and also (starting with the class of 2027) the 15a lab; see below. The lab rule applies to Physics concentrators, Chem/Phys concentrators, and students completing a Physics secondary:
If you skip 15b and/or 15c and satisfy the E&M and/or waves requirement by taking an alternative course (approved by Prof. Georgi or me), then you must still complete the 15b and/or 15c labs at some point, on a pass/fail basis. (However, you don't need to do the 15b lab if you took AP50b or PS12b.) This is just an internal Physics Dept requirement; it’s doesn’t shown up anywhere in my.harvard.
You can complete the labs in a future semester if you wish, but our recommendation is that you do them at the same time you take the alternative course. (Students in 15b and 15c must of course do the lab when taking the course.) However, if you’re a senior, we strongly recommend doing the lab **now in the fall**, because the labs get very crowded in the spring, and additionally you may be traveling around visiting grad schools etc.
NEW THIS YEAR: Starting with the incoming first-years (the class of 2027), we will also require the 15a lab, for students who don’t take 15a/16/19 (or AP50a or PS12a).
If you are presently a sophomore or higher, this does NOT apply to you. You don’t need to compete the 15a lab if you didn’t take 15a/16. You just need to do the 15b and 15c labs.
To schedule your lab time, please email (as soon as possible):
15a: Preceptor Gregorio Ponti (gponti(a)g.harvard.edu<mailto:gponti@g.harvard.edu>)
15b: Prof. Mara Prentiss (prentiss(a)g.harvard.edu<mailto:prentiss@g.harvard.edu>)
15c: Preceptor Anna Wang-Holtzen (annawang1(a)g.harvard.edu<mailto:annawang1@g.harvard.edu>)
Please let me know if you have any questions.
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Hannah Belcher (she/her)
Graduate Program Administrator
Harvard University
Department of Physics
17 Oxford Street, 241 Jefferson Lab
Cambridge, MA 02138
P: 617-496-3968<tel:617-496-3968>
See My Hybrid Schedule<https://calendar.google.com/calendar/u/0?cid=Y19qczhzb29qYnRnaTR0bXBhMmU5dG…>
Harvard Physics Colloquium
Monday, October 2, 2023
Lecture in Jefferson 250 @ 4:30 PM
Tea served in Jefferson 450 @ 3:30 PM
*****
Michel Devoret, Frederick W. Beinecke Professor of Applied Physics, Yale University
ERROR CORRECTION OF A LOGICAL QUANTUM BIT BEYOND THE BREAK-EVEN POINT
The accuracy of logical operations on quantum bits (qubits) must be improved for quantum computers to surpass classical ones in useful tasks. To that effect, quantum information needs to be made robust to noise that affects the underlying physical system. Rather than suppressing noise, quantum error correction aims at preventing it from causing logical errors. This approach derives from the reasonable assumption that noise is local: it does not act in a coordinated way on different parts of the physical system. Therefore, if a logical qubit is correctly encoded non-locally in the larger Hilbert space of a composite system, it is possible, during a limited time, to detect and correct noise-induced evolution before it corrupts the encoded information.
We will present an experiment based on a superconducting cavity and a transmon synthetic atom – the latter employed here as an auxiliary non-linear element [1] – that implements autonomous error correction, incorporating novel primitive operations [2] and feedback control based on reinforcement learning [3]. Recently, we have stabilized in real-time a logical qubit manifold spanned by the so-called Gottesman-Kitaev-Preskill grid states, reaching a correction efficiency such that the lifetime of the encoded information was prolonged by more than a factor of two beyond the lifetime of the physical qubits composing our system [4].
[1] Campagne-Ibarcq, Eickbusch, Touzard, et al., Nature 584, 368-372 (2020).
[2] Eickbusch et al., Nature Physics 18, 1464 (2022).
[3] Sivak et al., Phys. Rev. X 12, 011059 (2022).
[4] Sivak et al., Nature 616, 50-55 (2023).
Michel Devoret graduated with an electrical engineer diploma in 1975 from the Ecole Nationale Supérieure des Télécommunications in Paris and with an MSc in atomic and molecular physics in 1976 from the University of Paris. He then did his PhD research on the NMR of solid hydrogen at very low temperatures in the laboratory of Prof. Anatole Abragam at CEA Saclay. Working as a post-doc in the group of Prof. John Clarke at Berkeley, he demonstrated in 1984 with John Martinis that Josephson circuits exhibited quantum energy levels, the basis of today’s superconducting qubits. Back at Saclay, he founded his own research group on mesoscopic superconductivity and single charge effects. In 2002, he moved to Yale University where his group developed new quantum devices like quantum limited amplifiers and the fluxonium qubit. Recently, his group concentrated on the physics of quantum jumps and the error correction of a logical qubit. Michel is a member of the National Academy of Sciences and the recipient of several prizes, including the Ampère Prize of the French Academy of Sciences, the John Bell Prize and the Fritz London Memorial Prize.
Zoom Details
Please click the link below to join the webinar:
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Passcode: 506586
*****
Sylvia Vieira
Events Coordinator
Department of Physics, Harvard University
Lyman Lab. Room 236
O: (617) 495-9801
Hello everyone!
Come join WiP and SPS this Monday, October 2 at 7pm in Jefferson 250 for a
panel discussion on the graduate school application process from both
graduate students and members of Harvard's admissions team! Panelists
include Professor Julia Mundy, co-Director of Graduate Studies Dr. Jacob
Barandes, and grad students from a variety of fields in physics.
We will cover application requirements, funding, and grad student life in
general. Any and all questions are welcome!
If you are planning on attending, please fill out this RSVP form
<https://docs.google.com/forms/d/e/1FAIpQLSdplMLmRXnbfeQu9x2Iy1qMxwFaEjAvy_m…>.
We will be having pizza and would like to know how much to get.
Best,
Athalia and Hana
Hi y’all!
Please join us for a sweet social hosted by the Queer Physics Collective
and PRIMUS committees in the undergraduate lounge today at 7:30pm! We will
have* Insomnia cookies, candies, and bracelet-making supplies! *If you plan
to come, please rsvp <https://forms.gle/BGokxAYADWRUtd6H8> so we know how
many cookies to order and accommodate dietary needs. Hope to see you there!!
Best,
QPC and PRIMUS
_
Rain (Kimberly) Wang
*(they/them/theirs)*
Bachelor's Candidate in Physics
Harvard College | Class of 2025
Hi Everyone!
Please join us for a sweet social hosted by the Queer Physics Collective
and FGLI in Physics committees in the undergraduate lounge on Friday 9/29
at 7:30pm! We will have* Insomnia cookies, candies, and bracelet-making
supplies! *If you plan to come, please rsvp
<https://forms.gle/BGokxAYADWRUtd6H8> so we know how many cookies to order
and accommodate dietary needs. Hope to see you there!!
Best,
QPC and FGLI in Physics
_
Rain (Kimberly) Wang
*(they/them/theirs)*
Bachelor's Candidate in Physics
Harvard College | Class of 2025
Destroyers of worlds?: Oppenheimer and the role of scientific institutions in military innovation
Wednesday, September 27th, 4:30 pm in Jefferson Labs 250
Panel Discussion
[cid:ii_ln0rmdl40]
--
Rodrigo Araiza Bravo
Ph.D. Candidate | Yelin Group
STS Secondary Field | Harvard STS
Research Lead on Quantum Ethics | Quantum Ethics Project
M.S. Physics, Harvard University '21
B.S. Physics and Mathematics, UIUC '18