December 9, 2024 Monday 11:00 AM
+
726
Broadway, Room 1067
Center for Quantum Information Physics Seminars
(
cqip)
Edwin Barnes
Virginia Tech
Control-based variational quantum algorithms and dynamical noise suppression
The simulation of strongly correlated systems is one of the most exciting potential applications of quantum computers. There is hope that variational algorithms could enable the simulation of classically intractable problems on near-term devices, but this requires significant reductions in both variational circuit depths and measurement counts. I will discuss our recent efforts to lower these resource demands by eliminating quantum gates and circuits completely and instead optimizing control pulses directly. I will also describe a general approach to designing control pulses that suppress noise while implementing qubit rotations that is based on shaping geometric space curves.
December 9, 2024 Monday 12:30 PM
+
726
Broadway, 940, CCPP Seminar
Other Center for Cosmology and Particle Physics Events
(
ccpp)
CCPP Brown Bag
Anna Suliga
New York University
Non-conservation of Lepton Numbers in the Neutrino Sector Could Change the Prospects for Core Collapse Supernova Explosions
December 9, 2024 Monday 3:30 PM
+
Hybrid: 726
Broadway, Room 871 and Zoom
Soft Condensed Matter Seminars
(
csmr)
CSMR Monday "Morning" Seminar
New York University
Min Kyung Lee and Guanming Zhang Presenting
https://nyu.zoom.us/j/95320061490
December 10, 2024 Tuesday 2:00 PM
+
726
Broadway, 940, CCPP Seminar
Astrophysics and Relativity Seminars
(
astro)
Keith Hawkins
University of Texas at Austin
Galactic Archaeology in the Gaia Era
Our universe it made up of many billions of galaxies, yet we are still trying to figure out how they form, evolve, and assemble themselves over cosmic. This question of galaxy formation and assembly is among the most fundamental in modern astronomy yet the answer still eludes us to this day. The Milky Way is an optimal laboratory for answering the questions of galaxy formation and assembly because it is one of the only systems to date where we can obtain detailed and precise data on the positions motions and chemical composition for billions of individual stars. Using our Galaxy as a sandbox for exploring galaxy formation and assembly is the essence of Galactic archaeology. In this talk, I will discuss the work my group has done on uncovering the structure and assembly history of our Galaxy using large-scale astronomical surveys such as the Gaia mission.
December 10, 2024 Tuesday 2:00 PM
+
726
Broadway, 1067, CQP Seminar
Center for Quantum Phenomena Seminars
(
cqp)
Robert Huang
Caltech
Learning in the Quantum Universe
I will present recent progress in building a rigorous theory to understand how scientists, machines, and future quantum computers could learn models of our quantum universe. The talk will begin with an experimentally feasible procedure for converting a quantum many-body system into a succinct classical description of the system, its classical shadow. Classical shadows can be applied to efficiently predict many properties of interest, including expectation values of local observables and few-body correlation functions. I will then build on the classical shadow formalism to answer two fundamental questions at the intersection of machine learning and quantum physics: Can classical machines learn to solve challenging problems in quantum physics? And can quantum machines learn exponentially faster and predict more accurately than classical machines? I will answer both questions positively through mathematical analysis and experimental demonstrations.
December 11, 2024 Wednesday 2:00 PM
+
726
Broadway, 940, CCPP Seminar
High Energy Physics Seminars
(
hep)
Nathaniel Craig
University of California - Santa Barbara
Broken higher-form symmetries in particle physics
The study of generalized symmetries has led to new insights across high energy, condensed matter, and mathematical physics, but we are still in the early days of applications to particle physics. In this talk, I’ll briefly survey some of the generalized symmetries relevant for particle physics and present two examples where broken higher-form symmetries shed new light on phenomenology: the quality problem for extra-dimensional axions, and the quantum violation of baryon number in classically baryon-conserving unified theories. Both examples have novel astrophysical and cosmological implications. No prior familiarity with generalized symmetries is assumed or required.
December 12, 2024 Thursday 11:00 AM
+
726
Broadway, Room 1067
Center for Quantum Information Physics Seminars
(
cqip)
Ludovic Perret
Laboratoire d’Informatique de Paris 6
Public-Private Initiative in Post-Quantum Cryptography
The possible construction of a large-scale quantum computer poses a systemic threat to currently deployed public-key cryptography.
Shor’s quantum algorithms permit to break number-theoretic cryptosystems (such as Diffie-Hellman, RSA, ECDSA) which form the security
backbone of digital communications.
Post-Quantum Cryptography (PQC) is a solution to mitigate this risk and provides a new generation of cryptography designed to be resistant against any
powerful quantum computer. Recently, PQC has received much attention from standardization bodies (e.g., the NIST PQC standardization processes)
and policy sectors (e.g., the US Quantum Computing Cybersecurity Preparedness Act).
After five years and three rounds of selection, NIST selected the first set of PQC standards in 2022. This selection is a major milestone marking a new
era of (post-quantum) cryptography. NIST standardization marks the first step toward a wide-scale deployment of PQC. However, this transition from legacy
networks protected with classical cryptography to a more robust, quantum-resistant, infrastructure is especially challenging. Many open questions at the intersection
of fundamental research and innovation need to be addressed in the short term.
This talk will present some of these challenges and a new initiative at Sorbonne University that aims to gather academics, the public sector at large, and industry to address fundamental and industrially relevant open problems.
This initiative is structured around three main scientific axes, 1) basic security analysis of pos-quantum schemes, 2) tools to help the transition, and 3) design of enhanced primitives/protocols.
The initiative also includes a multidisciplinary track that will consider the impact of post-quantum cryptography beyond the pure scientific/technical questions : standardization, regulation, policy issues, and innovation
December 12, 2024 Thursday 2:00 PM
+
726
Broadway, 901, Sm Conf
Other Center for Cosmology and Particle Physics Events
(
ccpp)
Informal Astro Talk
Amir Levinson
Tel Aviv University
High Energy Astrophysics
December 12, 2024 Thursday 4:00 PM
+
Hybrid: 726
Broadway, Room 940 and Zoom
Physics Colloquia
(
colloquia)
Vincenzo Vitelli
University of Chicago
Learning and Active Mechanics
Physical learning is an emerging paradigm whereby materials acquire behaviors by exposure to examples. So far, it has been applied to static properties encoded in energy minima. In this talk, we extend it to dynamic functionalities, such as motion and shape change. Using a generalized Hopfield model, we delineate the key physical ingredients needed and illustrate them with LEGO toys as well as potential active matter platforms based on oil droplets with chemotactic signaling that learn life-like functionalities. Next, we turn to investigate how living organisms themselves exploit active mechanics to change their shape. Using machine learning, we infer an interpretable model of morphogenesis in Drosophila embryos that captures how tissue flow is regulated by protein dynamics and validate it with a mutant analysis. This data driven model taken together with experiments on human stem cells suggest that our machine-learned mechanism for early neuroectoderm morphogenesis is conserved across species.
December 13, 2024 Friday 2:00 PM
+
726
Broadway, 973, CQP Seminar
Center for Quantum Phenomena Seminars
(
cqp)
Special CQP Seminar
Andrea Gambassi
SISSA - International School for Advanced Studies (Trieste, Italy)
A Surprising Centenarian: The Ising Model and Its Quantum Interface Dynamics
Although centenarian, the Ising model is still a source of interesting problems, especially out of equilibrium. In this talk, I consider the two-dimensional quantum model on the square lattice and discuss the evolution of coexisting ferromagnetic domains, which is relevant for understanding the quantum nucleation dynamics and the false-vacuum decay. When the Ising coupling is large, I show that a smooth quantum-fluctuating interface delimiting a large two-dimensional domain can be studied in terms of a one-dimensional integrable chain of fermionic particles, having interesting connections with noteworthy results in mathematics and with similar problems in classical statistical physics. After discussing the interface dynamics on the lattice and in the continuum limit, I provide numerical evidence that this non-ergodic dynamics — due to the Stark localization of fermions — is observed also with a finite Ising coupling.
January 27, 2025 Monday 11:00 AM
+
726
Broadway, Room 1067
Center for Quantum Information Physics Seminars
(
cqip)
Haruki Kiyama
University of Osaka
TBA
January 28, 2025 Tuesday 1:00 PM
+
726
Broadway, Room 1025
Center for Quantum Information Physics Seminars
(
cqip)
Akira Oiwa
University of Osaka
TBA
January 30, 2025 Thursday 11:00 AM
+
726
Broadway, Room 1067
Center for Quantum Information Physics Seminars
(
cqip)
Kin Chung Fong
Northeastern University
TBA
February 3, 2025 Monday 12:30 PM
+
726
Broadway, 940, CCPP Seminar
Other Center for Cosmology and Particle Physics Events
(
ccpp)
CCPP Brown Bag
Jeremy Tinker
New York University
A scientific history of halo occupation
February 10, 2025 Monday 12:30 PM
+
726
Broadway, 940, CCPP Seminar
Other Center for Cosmology and Particle Physics Events
(
ccpp)
CCPP Brown Bag
Emily Davis + Ken Van Tilburg
New York University
Detecting Dark Matter
February 13, 2025 Thursday 11:00 AM
+
726
Broadway, Room 1067
Center for Quantum Information Physics Seminars
(
cqip)
Nathalie de Leon
Princeton University
TBA
February 19, 2025 Wednesday 2:00 PM
+
726
Broadway, 940, CCPP Seminar
High Energy Physics Seminars
(
hep)
Netta Engelhardt
Massachusetts Institute of Technology
TBA
February 27, 2025 Thursday 4:00 PM
+
Hybrid: 726
Broadway, Room 940 and Zoom
Physics Colloquia
(
colloquia)
Karri Dipetrillo
University of Chicago
Towards a Multi-TeV Muon Collider: Today's R&D for Tomorrow's Discoveries
Future high energy colliders are essential to unravel the mysteries of the universe. The question is how best to access higher energies. After decades of physically larger and larger pp and e+e- machines, a compact and power-efficient muon collider would represent a paradigm shift for the field. In this talk, I'll make the case that a multi-TeV Muon Collider is a compelling successor to the LHC, and outline recent progress in overcoming technical challenges. In particular, I'll discuss how the unique collision environment influences detector design, and demonstrate that we can extract high quality physics with existing and emerging technologies.
March 5, 2025 Wednesday 2:00 PM
+
726
Broadway, 940, CCPP Seminar
High Energy Physics Seminars
(
hep)
Giorgio Gratta
Stanford University
nEXO and the quest for neutrino-less double beta decay.
Neutrinos, the only neutral elementary fermions, have provided many surprises. Flavor
oscillations reveal the non-conservation of the lepton flavor number and demonstrate that
neutrino masses are finite; yet they are surprisingly much smaller than those of other fermions
(by at least six orders of magnitude!) It is then natural to ask if the mechanism providing the
mass to neutrinos is the same that gives masses to the other (charged) elementary fermions
and if neutrinos are described by 4-component Dirac wavefunctions or, as is possible for neutral
particles, by 2-component Majorana ones.
The hypothetical phenomenon of neutrino-less double-beta decay can probe the Majorana
nature of neutrinos and the conservation of the total lepton number. It may also help
elucidating the origins of mass in the neutrino sector. This is the Frontier of neutrino physics.
Following the well-known principle that there is no free lunch in life, interesting half-lives for
neutrino-less double-beta decay exceed 10^{25} years (or ~10^{15} times the age of the Universe!)
making experiments rather challenging. I will describe nEXO, a 5-tonne, enriched Xenon
experiment with a sensitivity reaching beyond 10^{28} years, or >100 times the current state of the
art. The nEXO detector derives directly from EXO-200, a very successful, rogue detector built
by a collaboration with a heavy SLAC-Stanford participation.
March 12, 2025 Wednesday 2:00 PM
+
726
Broadway, 940, CCPP Seminar
High Energy Physics Seminars
(
hep)
Junwu Huang
Perimeter Institute
TBA
TBA
March 13, 2025 Thursday 11:00 AM
+
726
Broadway, Room 1067
Center for Quantum Information Physics Seminars
(
cqip)
Georgios Katsaros
Institute of Science and Technology of Austria
TBA
March 19, 2025 Wednesday 2:00 PM
+
726
Broadway, 940, CCPP Seminar
High Energy Physics Seminars
(
hep)
Daniel Harlow
MIT
TBA
March 28, 2025 Friday 11:00 AM
+
726
Broadway, Room 1067
Center for Quantum Information Physics Seminars
(
cqip)
Giordano Scappucci
Delft University of Technology
TBA
April 2, 2025 Wednesday 2:00 PM
+
726
Broadway, 940, CCPP Seminar
High Energy Physics Seminars
(
hep)
Csaba Csaki
Cornell University
TBA
April 10, 2025 Thursday 11:00 AM
+
726
Broadway, Room 1067
Center for Quantum Information Physics Seminars
(
cqip)
Anthony Sigillito
University of Pennsylvania
TBA
May 1, 2025 Thursday 11:00 AM
+
726
Broadway, Room 1067
Center for Quantum Information Physics Seminars
(
cqip)
Archana Kamal
Northwestern University
TBA
