Seminars


  • Physics Colloquium

    Information and Physics: The Harris Criterion and Beyond

    Moshe Goldstein, Tel-Aviv University

    05 Mar 2024, 15:15 Ilse Katz Institute for Nanoscale Science & Technology (51), room 015

  • Astrophysics and Cosmology Seminar

    Little red dots -- JWST uncovers a new population of dust-obscured AGN in the epoch of reionization

    Lukas Furtak, BGU

    06 Mar 2024, 11:10 Sacta-Rashi Building for Physics (54), room 207

  • Quantum optics seminar

    In situ measurement and control of the laser-induced strong field ionization phenomena

    Noam Shlomo, Ben-Gurion University of the Negev

    06 Mar 2024, 16:00 Zoom Only

Condensed Matter Experimental

Mechanical properties on the nm scale


Yishay Manassen

Strain map from Gd islands and Local young modulus of nanoparticles.

The scanning tunneling microscope is a device capable of observing an image with atomic resolution and is capable of observing physical phenomena on the atomic scale. In this study we are interested in the nm scale mechanical properties, normally studied macroscopically, which can vary in different locations on the surface. These properties are the stress and strain tensors, the elastic constants, the surface energy and stress. These values can be measured either using a external perturbation (the STM tip) or internal perturbation (a heteroepitaxial island, chemical reaction).

High-Energy Physics

Quantum gravity & quantum black holes


Ram Brustein

Quantum black hole swallows matter and evaporates quantum mechanically

Are Einstein's equations and general relativity compatible with quantum mechanics? In spite of intense efforts over the last 40 years by some of the best physicists we still do not know the answer . I study the properties of black holes and other space-times with horizons to probe the laws of quantum gravity. Based on our recent research, our proposed answer is: Yes. The apparent incompatibilities between general relativity and quantum mechanics originate from the extreme approximation of treating spacetime as a strictly classical geometric object.

Seminars


  • Physics Colloquium

    Information and Physics: The Harris Criterion and Beyond

    Moshe Goldstein, Tel-Aviv University

    05 Mar 2024, 15:15 Ilse Katz Institute for Nanoscale Science & Technology (51), room 015

  • Astrophysics and Cosmology Seminar

    Little red dots -- JWST uncovers a new population of dust-obscured AGN in the epoch of reionization

    Lukas Furtak, BGU

    06 Mar 2024, 11:10 Sacta-Rashi Building for Physics (54), room 207

  • Quantum optics seminar

    In situ measurement and control of the laser-induced strong field ionization phenomena

    Noam Shlomo, Ben-Gurion University of the Negev

    06 Mar 2024, 16:00 Zoom Only

Condensed Matter Theory

Topological Supercoductors and Majorana Fermions


Eytan Grosfeld

Majorana fermion based superconducting qubit

We are interested in properties of topological superconductors, a fascinating state of matter that could be harnessed to create a new type of quantum computer [E. Ginossar and E. Grosfeld, Nature Communications 5, 4772 (2014), Tunability of microwave transitions as a signature of coherent parity mixing effects in the Majorana-transmon qubit.]

Biological and Soft Matter Physics

Internal dynamics of biological polymers: DNA molecules, actin filaments


Oleg Krichevsky

The dynamics of a semi-flexible polymer

The problem of polymer dynamics is rather old, going back to the 1930-s. How the stochastic thermal motion (diffusion) reveals itself in the dynamics of polymer segments which are bound by connectivity along the chain, by polymer stiffness, by topological constrains, by hydrodynamic and other interactions? The question does not have simple solutions in neither theory, computer simulations, or experiments. We have developed an original experimental approach to measure the dynamics of biological polymers, such as DNA at the level of single monomer with high temporal and spatial resolution.

Seminars


  • Physics Colloquium

    Information and Physics: The Harris Criterion and Beyond

    Moshe Goldstein, Tel-Aviv University

    05 Mar 2024, 15:15 Ilse Katz Institute for Nanoscale Science & Technology (51), room 015

  • Astrophysics and Cosmology Seminar

    Little red dots -- JWST uncovers a new population of dust-obscured AGN in the epoch of reionization

    Lukas Furtak, BGU

    06 Mar 2024, 11:10 Sacta-Rashi Building for Physics (54), room 207

  • Quantum optics seminar

    In situ measurement and control of the laser-induced strong field ionization phenomena

    Noam Shlomo, Ben-Gurion University of the Negev

    06 Mar 2024, 16:00 Zoom Only

Astrophysics and Cosmology

Black Holes


Uri Keshet

Stellar trajectories around SgA*, the central black hole of the Milky Way

Black holes play a dual role in physics, both as astronomical objects routinely discovered nowadays in binaries and in galactic centers, and as basic elements in quantum gravity. The presence of a supermassive black hole in the center of our own galaxy is evident from the trajectories of stars around a small region known as SgA* (see movie). We study black holes such as the one hiding in SgA*, and their dense stellar environment.

Atomic, Molecular and Optical Physics

Quantum Interferences and Lasing without inversion


Reuben Shuker

Sub-natural-width peak

Quantum-interference-related phenomena have many implications in physics. Quantum interference between two independent quantum channels in three-level systems gives rise to various coherent phenomena, such as electromagnetically induced transparency (EIT), coherent population trapping (CPT), lasing/gain without inversion (LWI/GWI), enhancement of refraction index, sub- and super-luminal light propagation etc. These phenomena open a wide-range perspective for new type of phase-sensitive spectroscopy. An example is the possibility to get sub-natural line widths (see movie).