Emeriti

Name	Discipline/Position	Phone	Office
Margoninski Yohanan	Condensed Matter Physics	02 6584 338	Kaplun 9
Bauminger Rivka	Condensed Matter Physics	02 6584 744	Kaplun 11
Gutfreund Hanoch	Biophysics and Interdisciplinary Research	02 6584 802	Kaplun 109
Ron Akiva	Biophysics and Interdisciplinary Research	02 6586 885	Popick 109
Tikochinsky Yoel	Biophysics and Interdisciplinary Research	02 6586 884	Yoel Tikochinsky
Goldberg Isser	Biophysics and Interdisciplinary Research	02 6584 491	Popick 107
Wagschal Jehudah	Biophysics and Interdisciplinary Research	02 6584 521	Popick 105
Lichtenstadt Itamar	Astrophysics and Relativity	02 6584 491	Popick 107
Stein Josef	Astrophysics and Relativity	02 6584 806	Popick 109
Barkat Zalman	Astrophysics and Relativity	02 6586 857	Popick 120

Pages

Upcoming Events

Tomorrow

Inhouse meeting: Odelia
- Start time: 12:00pm
- End date: Sunday, January 17th
- End time: 01:00pm
- Meeting Link:%%%%%%%%%%%%%%%%%%%%%%%%%%https://huji.zoom.us/j/86394061310?pwd=WjQrYXJHTU1wcFJIWDhtTk9IVFlUZz09Meeting ID: 863 9406 1310Passcode: 230598
- View this event in Google Calendar

Monday, January 18th

Eli Megidish
- Start time: 10:00am
- End date: Monday, January 18th
- End time: 11:00am
- View this event in Google Calendar
Eli Megidish - Quantum Seminar - Candidate
- Start time: 10:00am
- End date: Monday, January 18th
- End time: 11:30am
- Lecturer: Dr. Eli MegidishTitle: Quantum information science usingtrapped ions"Abstract: The high degree of controlavailable over individual atoms holds a great promise to harness quantumsystems for improved computation, metrology and sensing. In the first part ofthe talk I will present the application of a trapped ion quantum system in precision tests of fundamental physical concepts. In search for physics beyondthe standard model we performed a precision test of Local Lorentz Invariance(LLI) for the electron. Using a trapped ion system we were able to improve thebounds on the violation of LLI for electrons and show how precisionmeasurements can be improved using tools from quantum information. Weexplicitly demonstrate the advantage from entanglement on a precision testreaching the quantum projection noise limit set by quantum mechanics. Underspecific conditions, multipartite entangled states may yield substantialfurther improvements.In the second part of thetalk I will describe our efforts in developing the technological enablers toscale the trapped ion systems. This effort involves scalable traps,integrated control and noise mitigation.
- View this event in Google Calendar

Tuesday, January 19th

astrolunch: Lorentzo Posti
- Start time: 12:30pm
- End date: Tuesday, January 19th
- End time: 01:30pm
- Title: Where feedback fails: clues from the dynamics of massive galaxiesAbstract: It is widely understood that galaxies use, throughout the Hubble time, only a small fraction of the baryons associated to their dark matter halos to form stars. Such low baryon-to-stars conversion efficiencies are expected in galaxy formation scenarios where stellar/AGN feedback play a key role in regulating star formation in galaxies, respectively at the low- and high-mass end.In this talk I will show how we can constrain this scenario using galaxy dynamics. Both robust determinations of disc dynamical scaling relations (e.g. Tully-Fisher, mass-size) and accurate measurements of dark matter halo masses from HI rotation curves of spirals and from the kinematics of globular clusters around ellipticals, provide compelling evidence that the population of massive spirals has systematically larger baryon-to-stars conversion efficiencies than ellipticals. In fact, we see that the baryon-to-stars conversion efficiency monotonically increases with mass for discs, while it shows a clear turn over at about L* only for spheroids. I will discuss the possible repercussions that these results have, highlighting in particular what they imply in terms of AGN feedback in galaxies of different types. Finally I will show that current state-of-the-art cosmological hydrodynamical simulations (EAGLE, TNG) still struggle to reproduce what we observe for the most massive discs. Zoom linkhttps://huji.zoom.us/j/84740565269?pwd=R2o3Vk9BUFRGZ0hzT3B6Zm9USmthQT09 Meeting ID: 847 4056 5269 Passcode: w31c0m3
- View this event in Google Calendar

Wednesday, January 20th

Nonlinear Physics Seminar :"Kapitza resistance in one dimension: basic models and classes of universality"
- Start time: 12:00pm
- End date: Wednesday, January 20th
- End time: 01:30pm
- Lecturer: O.V.Gendelman, Faculty of Mechanical engineering, Technion – Israel Institute of Technology Abstract:It is commonly accepted today, that one-dimenisonal lattice models can belong to threeuniversality classes with respect to the bulk heat conduction. The first class (e.g. lattices withlinear interactions) is characterized by heat flux that is proportional to temperature differencerather than to the temperature gradient. The second class includes models with size-dependent heat conduction coefficient (e.g. Fermi-Pasta-Ulam model and similar nonlinearchains with conserved momentum). The third class includes the chains that can becharacterized by well-defined convergent heat conduction coefficient in the thermodynamiclimit (e.g. Frenkel – Kontorova model or chain of rotators). There exist some quarrels andcontradictions on classification of various exotic chain models, but the universality classesseem well-established.The talk will address, in a sense, the opposite limit case with respect to a transport in thehomogeneous bulk – Kapitza, or boundary, thermal resistance (KR). This phenomenon (sharpstep in the temperature profile) readily reveals itself if one considers either isolated isotopicor link defect in the homogeneous chain, or interface between two chain fragments withdifferent characteristics. Linear chain model with isolated defect allows exact analytic solutionfor the KR – so, contrary to the bulk conductivity, the resistance has well-defined value also inthe linear chain. However, the result strongly depends on the model of thermostat –therefore, the anomaly still is well articulated.Account of nonlinearity demonstrates that the KR properties are related to the universalityclass with respect to the heat conduction, to which the considered chain model belongs. Inlinear chains, the KR does not depend on the chain length in the thermodynamic limit, butsubstantially depends on the characteristics of thermostats used in the simulations. In themodels with size-dependent heat conduction coefficient, the KR also is substantially size-dependent, despite strong localization of the Kapitza step. Finally, in the models with normalheat conductivity the KR is also normal, i.e. size- and thermostat-independent in thethermodynamical limit.
- View this event in Google Calendar

Thursday, January 21st

High Energy Astro Seminar - Prof. Thomas Janka (MPA) - " Core-collapse Supernova Theory: Successes and Perspectives"
- Start time: 01:00pm
- End date: Thursday, January 21st
- End time: 02:00pm
- Title: Core-collapse Supernova Theory: Successes and PerspectivesAbstract:Supernova explosions terminate the lives of massive stars, produce and disseminate a major fraction of the heavy elements, and give birth to neutron stars and black holes. Their explosions can be triggered by energy transfer through neutrino heating, magnetorotational effects, or a hadron-quark phase transition in high-mass neutron stars, which tap the thermal, rotational, or gravitational energy reservoir of the new-born compact remnant. Recent 3D simulations have confirmed the viability of these mechanisms and, in particular, have shown that neutrino-driven explosions can explain the morphological and chemical asymmetries observed in supernovae, supernova remnants, and in the form of neutron star kicks. The talk will review these results with a special eye on neutrinos and their diagnostic potential to reveal the dynamical processes and thermodynamic conditions in the supernova core. Frontiers of the field are connected to the problem of neutrino-flavor oscillations and the question which stellar populations explode by dint of an important role of rotation and magnetic fields.
- View this event in Google Calendar

Search form

Emeriti

Pages