Seminars

• Condensed Matter Seminar

  Superdiffusion in random two dimensional system with ubiquitous long-range hopping

  Alexander L. Burin, Tulane University, New Orleans

  27 Jun 2022, 11:30 Sacta-Rashi Building for Physics (54), room 207

• Particles and Fields Seminar

  Complexity with penalties

  Osher Shoval, Ben-Gurion University

  27 Jun 2022, 14:00 Sacta-Rashi Building for Physics (54), room 207

• Physics Colloquium

  Things that can happen when you "kick" a solid

  Daniel Podolsky, Technion

  27 Jun 2022, 16:10 Ilse Katz Institute for Nanoscale Science & Technology (51), room 015

Biological and Soft Matter Physics

Mechanisms of Species Diversity Change in Stressed Environments

Ehud Meron

The impacts of environmental changes on species diversity, and thus on ecosystem function and stability, is a central topic of current ecological research. At the landscape scale, where symmetry breaking vegetation patterns appear, a transition from one pattern state to another may take place (Animation). Using a mathematical modeling approach, we developed a theory of plant communities in water limited system, and are currently using it to highlight mechanisms of species diversity change in response to climate changes and disturbances.

Atomic, Molecular and Optical Physics

Attosecond Science and Nanophotonics Lab

Eugene Frumker

We are setting up a brand-new research laboratory of Attosecond Science and Nanophotonics in the Physics Department of the Ben-Gurion University. In our group, we focus on both experimental and theoretical studies at the interface of ultrafast nonlinear optics, attosecond science and nanoscience. More specifically, our work involves generation, measurement and control of the interaction of light and matter in atoms, molecules and nanosystems in space and time at extremely short (attosecond=10^(-18)sec) time scales. Our interests range from fundamental physical phenomena to applications.

Seminars

• Condensed Matter Seminar

  Superdiffusion in random two dimensional system with ubiquitous long-range hopping

  Alexander L. Burin, Tulane University, New Orleans

  27 Jun 2022, 11:30 Sacta-Rashi Building for Physics (54), room 207

• Particles and Fields Seminar

  Complexity with penalties

  Osher Shoval, Ben-Gurion University

  27 Jun 2022, 14:00 Sacta-Rashi Building for Physics (54), room 207

• Physics Colloquium

  Things that can happen when you "kick" a solid

  Daniel Podolsky, Technion

  27 Jun 2022, 16:10 Ilse Katz Institute for Nanoscale Science & Technology (51), room 015

High-Energy Physics

Effective Theories and Quantum Gravity

Eran Palti

Effective theories are simplified physics models which neglect high-energy processes. If those theories include gravitational physics, then the omitted high-energy physics must include that of Quantum Gravity. Not all effective theories can be consistently completed at high energies into Quantum Gravity. Those which can are said to belong to the Landscape of effective theories. While those which cannot are said to belong to the Swampland of inconsistent theories. We study what are the criteria which differentiate an effective theory in the Landscape from one in the Swampland.

Condensed Matter Experimental

Noise in strongly correlated systems

Grzegorz Jung

Normalized spectral density and R(T) for distinct resistivity states

To many physicist the subject of fluctuations appears esoteric and even pointless; spontaneous fluctuations seem nothing but an unwanted evil which only an unwise experimenter would encounter. In reality, noise enables a deep insight into physics of the system. Recently, we have employed noise to discriminate various resistivity states in the ferromagnetic insulating manganite La0.86Ca0.14MnO3. Different states arise due to transitions between local minima of the electronic glass potential landscape. Remarkably, freezing into the glass state is marked by the onset of non-Gaussian noise.

Seminars

• Condensed Matter Seminar

  Superdiffusion in random two dimensional system with ubiquitous long-range hopping

  Alexander L. Burin, Tulane University, New Orleans

  27 Jun 2022, 11:30 Sacta-Rashi Building for Physics (54), room 207

• Particles and Fields Seminar

  Complexity with penalties

  Osher Shoval, Ben-Gurion University

  27 Jun 2022, 14:00 Sacta-Rashi Building for Physics (54), room 207

• Physics Colloquium

  Things that can happen when you "kick" a solid

  Daniel Podolsky, Technion

  27 Jun 2022, 16:10 Ilse Katz Institute for Nanoscale Science & Technology (51), room 015

Condensed Matter Theory

Non-equilibrium steady state of low-dimensional systems

Doron Cohen

It is possible to induce non-equilibrium steady state current, which required e.g. a radiation source. We have studied the non-monotonic dependence of the current on the intensity of the driving, and its statistical properties. We also have addressed questions that concern the relaxation of such current, and how it depends on percolation and localization properties of the model.

Astrophysics and Cosmology

Space Weather

Michael Gedalin

The Sun governs the life of the Earth. Solar-terrestrial relations occur not only via radiation coming to the Earth but also via time-varying plasma flow. This solar wind is decelerated and diverted by the bow shock forming at the distance of about 10 Earth radii toward the Sun. The diverted plasma flows around the Earth, shaping a magnetosphere with a long tail and a current sheet where the so called "magnetic reconnection" (see movie) occurs, causing magnetic substorms. We study the basic processes in this interaction.