People Mail List

Name	Primary Category	Discipline
Adiel Etty	Administration
Agam Oded	Faculty	Condensed Matter Physics
Agranov Tal	Graduate Students	Nonlinear
Aharon Nati	Post-Docs	Condensed Matter Physics
Alpern Hen	Graduate Students	Condensed Matter Physics
Amusia Miron Ya	Emeriti	Condensed Matter Physics
Anahory Yonathan	Faculty	Condensed Matter Physics
Arad-Vosk Neta	Graduate Students	Condensed Matter Physics
Armon Tsafrir	Graduate Students	Nonlinear
Arviv Galya	Graduate Students

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Upcoming Events

Tomorrow

Physics Colloquium : "From single-cell variability and correlations across lineages to the population growth"
- Start time: 12:00pm
- End date: Monday, December 10th
- End time: 01:30pm
- Lecturer: Ariel Amir
  
  Abstract:
  
  Genetically identical microbial cells often display diverse phenotypes. Stochasticity at the single-cell level contributes significantly to this phenotypic variability, and cells utilize a variety of mechanisms to regulate noise. In turn, these control mechanisms lead to correlations in various cellular traits across the lineage tree. I will present recent models we developed for understanding cellular homeostasis, with special focus on protein levels and cell size. These models allow us to characterize single-cell variability, including the emerging correlations and distributions. I will discuss the implications of stochasticity on the population growth. In contrast to the dogma, we find that variability may be detrimental to the population growth, suggesting that evolution would tend to suppress it.
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Thursday, December 13th

Condensed-Matter Seminar:"Collective quantum optics with 2D atom arrays"
- Start time: 12:00pm
- End date: Thursday, December 13th
- End time: 01:25pm
- Lecturer: Efi Shahmon
  Abstract:
  How do atoms radiate together? Although in general this is still an open question, addressing the problem of collective light-matter interactions in specific cases can lead to important insights and applications. In my talk, I will discuss how the collective optical response of a 2D array of trapped atoms renders it as a new platform for quantum science, with potential applications in quantum technologies. In particular, I will show how a dilute 2D array, comprised of even just a few dozen atoms, can perfectly reflect and scatter light, leading to the possibility of observing for the first time opto-mechanical phenomena at the single-photon level. I will discuss how this may pave the way towards the realization of “quantum metamaterials” which can exhibit a quantum superposition of their macroscopic optical responses.
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Biophysics Seminar: "Jamming and Geometry in Epithelial Biology"
- Start time: 02:00pm
- End date: Thursday, December 13th
- End time: 03:30pm
- Lecturer: Lior Atia, Postdoctoral Research Associate, Program in Molecular and Integrative Physiological Sciences (MIPS), Harvard - School of Public HealthAbstract:As an injury heals, an embryo develops, or a carcinoma spreads, epithelial cells systematically change their shape. In each of these processes cell shape is studied extensively whereas variability of shape from cell-to-cell is regarded most often as biological noise. But where do cell shape and its variability come from? In this talk I will show that cell shape and shape variability are mutually constrained through a relationship that is purely geometrical. That relationship is shown to govern processes as diverse as maturation of the pseudostratified bronchial epithelial layer cultured from non-asthmatic or asthmatic donors, and formation of the ventral furrow in the Drosophila embryo. Across these and other epithelial systems, shape variability collapses to a family of distributions that is common to all. That distribution, in turn, is accounted for by a mechanistic theory of cell-cell interaction showing that cell shape becomes progressively less elongated and less variable as the layer becomes progressively more jammed and solid-like. These findings suggest that, in diverse multicellular organisms, jamming behavior sets overriding geometrical constraints. Such constraints along with the well-recognized role of cellular geometry as a fundamental regulator of cell behavior, may provide the missing physical picture of cancer invasion and growth. This perspective points to the hypothesis that the malignant primary tumor is unjammed and fluid-like, and thus, through the agency of elongated cell shapes, may shed clusters of metastasizing cells and retain high mitotic capacity even in dense cell packing.
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