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December 01, 2013
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Date:07WednesdayFebruary 2024Lecture
Chemical and Biological Physics Guest seminar
More information Time 15:00 - 16:00Title The Stark effect in quantum dots: from spectral diffusion to coherent controlLocation Gerhard M.J. Schmidt Lecture HallLecturer Dr. Ron Tenne
University of KonstanzOrganizer Department of Chemical and Biological PhysicsContact Abstract Show full text abstract about While colloidal quantum dots (CQDs) are already an important...» While colloidal quantum dots (CQDs) are already an important building block in electro-optical devices, in the realm of quantum science and technology, they are often considered inferior with respect to emitters such as solid-state defects and epitaxial quantum dots. Despite their single-photon emission [1], demonstrations of quantum coherence and control are largely still lacking. The main obstacle towards these is spectral diffusion – stochastic fluctuations in the energy of photons emitted from an individual CQD even at cryogenic temperatures. In this talk, I will present our recent work providing, for the first time, direct and definitive proof that these fluctuations arise from stochastic electric fields in the particle’s nano environment [2]. However, the high sensitivity of CQDs to electric fields, through the quantum-confined Stark effect, can also be perceived as a feature, rather than a bug. I will present future concepts for coherent control of a single photon’s temporal wavefunction through an electric bias. Relying on tools from the terahertz and femtosecond-laser toolboxes [3,4], spectroscopy and control at fast-to-ultrafast (millisecond-to-femtosecond) timescales, will play a detrimental role in fulfilling the unique potential that CQDs hold in the field of quantum optics,.
[1] R. Tenne, U. Rossman, B. Rephael, Y. Israel, A. Krupinski-Ptaszek, R. Lapkiewicz, Y. Silberberg, and D. Oron, Super-Resolution Enhancement by Quantum Image Scanning Microscopy, Nature Photonics 13, 116 (2019).
[2] F. Conradt, V. Bezold, V. Wiechert, S. Huber, S. Mecking, A. Leitenstorfer, and R. Tenne, Electric-Field Fluctuations as the Cause of Spectral Instabilities in Colloidal Quantum Dots, Nano Lett. 23, 9753 (2023).
[3] P. Henzler et al., Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot, Physical Review Letters 126, 067402 (2021).
[4] P. Fischer, G. Fitzky, D. Bossini, A. Leitenstorfer, and R. Tenne, Quantitative Analysis of Free-Electron Dynamics in InSb by Terahertz Shockwave Spectroscopy, Physical Review B 106, 205201 (2022).
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Date:08ThursdayFebruary 2024Lecture
Vision and AI
More information Time 12:15 - 13:15Title Strong and Precise Modulation of Human Percepts via Robustified ANNsLocation Jacob Ziskind BuildingLecturer Guy Gaziv
MITOrganizer Department of Computer Science and Applied MathematicsContact Abstract Show full text abstract about The visual object category reports of artificial neural netw...» The visual object category reports of artificial neural networks (ANNs) are notoriously sensitive to tiny, adversarial image perturbations. Because human category reports (aka human percepts) are thought to be insensitive to those same small-norm perturbations — and locally stable in general — this argues that ANNs are incomplete scientific models of human visual perception. Consistent with this, we show that when small-norm image perturbations are generated by standard ANN models, human object category percepts are indeed highly stable. However, in this very same "human-presumed-stable" regime, we find that robustified ANNs reliably discover low-norm image perturbations that strongly disrupt human percepts. These previously undetectable human perceptual disruptions are massive in amplitude, approaching the same level of sensitivity seen in robustified ANNs. Further, we show that robustified ANNs support precise perceptual state interventions: they guide the construction of low-norm image perturbations that strongly alter human category percepts toward specific prescribed percepts. These observations suggest that for arbitrary starting points in image space, there exists a set of nearby "wormholes", each leading the subject from their current category perceptual state into a semantically very different state. Moreover, contemporary ANN models of biological visual processing are now accurate enough to consistently guide us to those portals.
project webpage
Bio:
Guy is a Computer Vision postdoctoral researcher at the DiCarlo Lab at MIT, interested in the intersection between machine and human vision. His PhD focused on decoding visual experience from brain activity. His current focus is on harnessing contemporary models of primate visual cognition for neural and behavioral modulation. Guy holds a PhD in Computer Science and an MSc in Physics from The Weizmann Institute of Science, and a BSc in Physics-EECS from The Hebrew University of Jerusalem.
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Date:08ThursdayFebruary 2024Lecture
The Language of Bacterial Pathogens, Commensals, and Biomedical Potentials
More information Time 15:00 - 16:00Location Nella and Leon Benoziyo Building for Biological SciencesLecturer Dr. Neta Sal-Man
Department of Microbiology, Immunology and Genetics (BGU)Organizer Department of Biomolecular SciencesContact Abstract Show full text abstract about Reported cases of diarrheal samples exhibiting co-infections...» Reported cases of diarrheal samples exhibiting co-infections or multiple infections with two or more infectious agents are on the rise, likely due to advances in bacterial diagnostic techniques. Our work aims to decode the communication between bacterial pathogens within the digestive system and investigates whether they compete or cooperate. Additionally, we examine how commensal strains of the microbiome intercept this communication through specific metabolites -
Date:11SundayFebruary 2024Lecture
Special Guest Seminar: Dr. Nir Ben Chetrit
More information Time 09:30 - 10:30Title Empowering a Paradigm Shift: Harnessing Innate Immunity and Tumor Immunization for Immuno-OncologyLocation Nella and Leon Benoziyo Building for Biological SciencesLecturer Dr. Nir Ben Chetrit
Weill Cornell Medicine ,New York Genome CenterOrganizer Department of Molecular Cell BiologyContact -
Date:11SundayFebruary 2024Lecture
The geologic history of marine dissolved organic carbon from iron (oxyhydr)oxides
More information Time 11:00 - 11:00Title EPS Department SeminarLocation Sussman Family Building for Environmental SciencesLecturer Nir Galili Organizer Department of Earth and Planetary SciencesContact -
Date:11SundayFebruary 2024Lecture
The Clore Center for Biological Physics
More information Time 13:15 - 14:30Title Tunable Architecture of Nematic Disclination LinesLocation Edna and K.B. Weissman Building of Physical SciencesLecturer Dr. Hillel Aharoni
department of physics of complex systemsOrganizer Clore Center for Biological PhysicsContact Abstract Show full text abstract about In this talk, I introduce a theoretical framework to tailor ...» In this talk, I introduce a theoretical framework to tailor three-dimensional defect line architecture in nematic liquid crystals. By drawing an analogy between nematic liquid crystals and magnetostatics, I will show quantitative predictions for the connectivity and shape of defect lines in a nematic confined between two thinly spaced glass substrates. I will demonstrate experimental and numerical verification of these predictions, and identify critical parameters that tune the disclination lines' curvature within an experimental setup, as well as non-dimensional parameters that allow matching experiments and simulations at different length scales. Our system provides both physical insight and powerful tools to induce desired shapes and shape changes of defect lines. -
Date:12MondayFebruary 2024Lecture
Midrasha on Groups Seminar
More information Time 11:15 - 13:00Title Applications of the Selberg trace formulaLocation Jacob Ziskind BuildingLecturer Benny Bachner
WeizmannOrganizer Department of MathematicsContact Abstract Show full text abstract about The talk is based on Nicolas Bergeron’s book, Section 5.4. ...» The talk is based on Nicolas Bergeron’s book, Section 5.4.
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Date:12MondayFebruary 2024Lecture
Midrasha on Groups Seminar
More information Time 14:15 - 16:00Title Isometric rigidity of the quadratic Wasserstein space over the Euclidean n-sphereLocation Jacob Ziskind BuildingOrganizer Department of MathematicsContact Abstract Show full text abstract about We study the structure of isometries of the quadratic Wasser...» We study the structure of isometries of the quadratic Wasserstein space W_2( -
Date:12MondayFebruary 2024Lecture
EPS AI discussion seminar- Machine Learning for Flood Forecasting: Research to Ope
More information Time 15:00 - 15:00Title EPS AI discussion seminarLocation Sussman Family Building for Environmental SciencesLecturer Grey Nearing Organizer Department of Earth and Planetary SciencesContact -
Date:13TuesdayFebruary 2024Lecture
To be announced
More information Time 10:00 - 11:00Location Nella and Leon Benoziyo Building for Biological SciencesOrganizer Department of Biomolecular SciencesContact -
Date:13TuesdayFebruary 2024Lecture
Mechanistic insights into ‘brainwashing’
More information Time 12:30 - 13:30Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. Jonathan Kipnis
Dept of Pathology and Immunology Washington University School of Medicine in St. LouisOrganizer Department of Brain SciencesContact -
Date:14WednesdayFebruary 202415ThursdayFebruary 2024Conference
German Israeli Immunology Workshop
More information Time 08:00 - 08:00Location The David Lopatie Conference CentreChairperson Steffen JungHomepage -
Date:14WednesdayFebruary 2024Lecture
Ironing out the details of mitochondrial translation
More information Time 10:00 - 11:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Dr. Tslil Ast
Department of Biomolecular SciencesContact -
Date:14WednesdayFebruary 2024Lecture
LS Luncheon
More information Time 12:00 - 14:00Title Principles and applications of computational protein designLocation Nella and Leon Benoziyo Building for Biological SciencesLecturer Prof. Sarel Fleishman Contact -
Date:14WednesdayFebruary 2024Lecture
The role of the corpus callosum in interhemispheric communication
More information Time 14:00 - 15:00Location The David Lopatie Hall of Graduate StudiesLecturer Yael Oran-PhD Thesis Defense
Prof. Ilan Lampl Lab Dept of Brain SciencesOrganizer Department of Brain SciencesContact Abstract Show full text abstract about Interhemispheric communication is a comprehensive concept th...» Interhemispheric communication is a comprehensive concept that involves both the synchronization of neural activity as well as the integration of sensory information across the two brain hemispheres. In this work, we explored these properties in the somatosensory system of the mouse brain. We show that during spontaneous activity in awake animals, robust interhemispheric correlations of both spiking and synaptic activities that are reduced during whisking compared to quiet wakefulness. And that the state-dependent correlations between the hemispheres stem from the state-depended nature of the corpus callosum activity. Further, to understand how sensory information is integrated across the brain's hemispheres, we studied bilateral and ipsilateral responses to passive whisker stimulation using widefield imaging and then employed a virtual tunnel environment to explore bilateral integration in active whisking -
Date:15ThursdayFebruary 2024Lecture
Vision and AI
More information Time 12:15 - 13:15Title ConceptLab: Creative Concept Generation using VLM-Guided Diffusion Prior ConstraintsLocation Jacob Ziskind BuildingLecturer Elad Richardson
Tel Aviv UniversityOrganizer Department of Computer Science and Applied MathematicsContact Abstract Show full text abstract about The surge of personalization techniques has allowed us to im...» The surge of personalization techniques has allowed us to imagine how existing concepts would look in new scenes. However, an intriguing question remains: How can we generate a new, imaginary concept that has never been seen before? In this talk, we will present the task of creative text-to-image generation, where we seek to generate new and imaginary concepts.
Bio
Elad Richardson is a computer vision researcher. In his MSc thesis, he explored the application of Deep Learning to 3D facial reconstruction under the supervision of Prof. Ron Kimmel. Elad is currently a PhD student under the supervision of Prof. Daniel Cohen-Or, focusing on generative models and their relation to computer-assisted creativity.
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Date:15ThursdayFebruary 2024Lecture
Geometric Functional Analysis and Probability Seminar
More information Time 13:30 - 14:30Title Two Problems on Homogenization in GeometryLocation Jacob Ziskind BuildingLecturer Oleg Ivrii
TAUOrganizer Department of MathematicsContact Abstract Show full text abstract about We show that a random quasiconformal mapping is close to an ...» We show that a random quasiconformal mapping is close to an affine mapping, while a circle packing of a random Delauney triangulation is close to a conformal map. This is joint work with Vlad Marković.
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Date:15ThursdayFebruary 2024Lecture
Nucleo-cytoplasmic shuttling of the 26 proteasome: A potential anti-cancer drug target and prognostic biomarker
More information Time 14:00 - 15:00Location Nella and Leon Benoziyo Building for Biological SciencesLecturer Prof. Aaron Ciehanover Ido Livneh
The Rappaport Faculty of Medicine and Integrated Cancer Center Technion-Israel Institute of Technology, HaifaOrganizer Dwek Institute for Cancer Therapy ResearchContact -
Date:18SundayFebruary 2024Lecture
PhD Thesis Defense by Adi Egozi (Prof. Shalev Itzkovitz Lab)
More information Time 10:00 - 12:00Title Single Cell Analysis of the Developing Human Small IntestineLocation Nella and Leon Benoziyo Building for Biological SciencesLecturer Adi Egozi
(Prof. Shalev Itzkovitz Lab)Organizer Department of Molecular Cell BiologyContact -
Date:18SundayFebruary 2024Lecture
PhD Thesis Defense by Ori Hassin (Prof. Moshe Oren Lab)
More information Time 11:30 - 13:30Title Cell autonomous and non-cell autonomous effects of p53 in colorectal cancer and breast cancerLocation Ullmann Building of Life SciencesLecturer Ori Hassin
Prof. Moshe Oren LabOrganizer Department of Molecular Cell BiologyContact