Seminars

 Title: Research Group:   -- ALL -- Condensed Matter and Statistical Physics Group Weekly Seminar Condensed Matter and Statistical Physics Group Weekly Seminar Farmanieh Seminar Room Condensed Matter Physics SeminarFarmanieh Seminar Room Condensed Matter Physics Seminar Farmanieh Seminar Room Condensed Matter Physics SeminarFarmanieh Seminar Room Foundational Physics (FP) Monthly Seminar Farmanieh Seminar Room HEPCo Group Weekly Seminar High Energy SeminarFarmanieh Seminar Room Physics ColloquiumFarmanieh Seminar Room Soft Matter, Biological and Statistical Physics Research Group Meeting Farmanieh Seminar Room Special SeminarFarmanieh Seminar RoomApplied Physics Research Lab. Weekly Seminar Farmanieh Seminar Room AApplied Physics Research Laboratory Seminar Farmanieh Seminar RoomAPRL Weekly Seminar Farmanieh Seminar RoomColloquiumFarmanieh Seminar RoomCondensed MatterCondensed Matter and Statistical Physics GroupCondensed Matter and Statistical Physics Group Special Seminar Farmanieh Seminar RoomCondensed Matter and Statistical Physics Group Weekly SeminarCondensed Matter and Statistical Physics Group Weekly SeminarFarmanieh Seminar RoomCondensed Matter and Statistical Physics Group Weekly Seminar Farmanieh Seminar RoomCondensed Matter and Statistical Physics Group Weekly SeminarFarmanieh Seminar RoomCondensed Matter and Statistical Physics Group Weekly Seminar Farmanieh Seminar RoomCondensed Matter Group Weekly SeminarFarmanieh Seminar RoomCondensed Matter Physics SeminarFarmanieh Seminar RoomCondensed Matter Physics Seminar Farmanieh Seminar Room Condensed Matter Physics SeminarFarmanieh Seminar RoomCondensed Matter Physics SeminarFarmanieh Seminar RoomCondensed Matter Physics SeminarFarmanieh Seminar RoomCondensed Matter Physics SeminarFarmanieh Seminar RoomCanceledCondensed matter physicsFarmanieh Seminar Roomcondensed Matter Seminar Farmanieh Seminar RoomCondensed Matter SeminarFarmanieh Seminar RoomCondensed MatterFarmanieh Seminar RoomCondensed MatterLarak Seminar RoomCondensed MatterNiavaran Seminar RoomCosmologyCosmologyFarmanieh Seminar RoomEarly Universe Cosmology GroupEarly Universe Cosmology Group SeminarFarmanieh Seminar RoomEarly Universe Cosmology GroupFarmanieh Seminar Room CANCELLEDEarly Universe Cosmology SeminarFarmanieh Seminar RoomEarly Universe Cosmology SeminarFarmanieh Seminar Room CanceledEarly Universe CosmologyFarmanieh Seminar RoomEarly University CosmologyFarmanieh Seminar RoomFoundatin Physics Group Weekly Seminar Farmanieh Seminar Room Foundation of PhysicsFoundation of Physics Group Monthly Seminar Farmanieh Seminar RoomFoundation of Physics Group Monthly SeminarFarmanieh Seminar RoomFoundation of Physics Group Monthly SeminarFarmanieh Seminar RoomFoundational Physics (FP) Monthly Seminar Farmanieh Seminar RoomFoundational Physics (FP) Monthly Seminar Farmanieh Seminar RoomFoundational Physics (FP) Monthly SeminarFarmanieh Seminar RoomFoundations of Physics GroupFoundations of Physics Group (Webinar)General SeminarFarmanieh, Classroom CGeneral SeminarFarmanieh Seminar RoomGeneral SeminarNiavaran Seminar RoomHEC SeminarFarmanieh Seminar RoomHEC SeminarFarmanieh Seminar Room HEC seminarFarmanieh Seminar RoomHEC SeminarFarmanieh Seminar RoomCanceledHEPCo Group Seminar(Notice the unusual time) Farmanieh Seminar RoomHEPCo Group Special Seminar Farmanieh Seminar RoomHEPCo Group Weekly SeminarHEPCo Group Weekly Seminar(Skype)HEPCo Group Weekly SeminarFarmanieh Seminar Room HEPCo Group Weekly Seminar Farmanieh Seminar RoomHEPCo Group Weekly SeminarFarmanieh Seminar RoomHEPCo Group Weekly Seminar Farmanieh Seminar Room HEPCo SeminarFarmanieh Seminar RoomHEPCo SeminarFarmanieh Seminar RoomHEPCo SeminarFarmanieh Seminar RoomHigh Energy SeminarFarmanieh Seminar RoomHigh Energy SeminarFarmanieh Seminar RoomHigh Energy SeminarFarmanieh Seminar RoomHigh Energy TheoryHigh Energy TheoryFarmanieh Seminar RoomInformal Colloquium Farmanieh Seminar RoomInformal ColloquiumFarmanieh Seminar RoomLecture Series in Condensed Matter and Statistical PhysicsFarmanieh Seminar RoomNext Early Universe Cosmology SeminarFarmanieh Seminar Roomparticles & PhenomenologyFarmanieh Seminar RoomParticles and AcceleratorParticles and PhenomenologyParticles and Phenomenology Seminar Farmanieh Seminar RoomParticles and Phenomenology SeminarCANCELEDFarmanieh Seminar RoomParticles and Phenomenology SeminarFarmanieh Seminar Room Particles and PhenomenologyFarmanieh Seminar RoomPhysics ColloquiumPhysics ColloquiumFarmanieh Conference HallPhysics ColloquiumFarmanieh Seminar RoomPhysics ColloquiumFarmanieh, Classroom CPhysics ColloquiumFarmanieh, Conference HallPhysics ColloquiumFarmanieh, Lecture Room CPhysics ColloquiumFarmanieh, Seminar RoomPhysics ColloquiumFarmanieh, Seminar Room CPhysics Colloquium Farmanieh Seminar RoomPhysics Colloquium Farmanieh Seminar Room C Physics ColloquiumFarmanieh Conference HallPhysics ColloquiumFarmanieh Seminar RoomPhysics ColloquiumFarmanieh Seminar Room CPhysics ColloquiumFarmanieh Seminar Room DPhysics Colloquium Farmanieh Seminar RoomPhysics Colloquium Farmanieh Seminar Room Physics ColloquiumFarmanieh Seminar Room Physics ColloquiumLarak Seminar RoomPhysics ColloquiumNiavaran Lecture Hall (number 1)Physics ColloquiumNiavaran Lecture Hall (number 2)Physics ColloquiumNiavaran Seminar RoomPhysics SeminarFarmanieh Seminar Room DPlasmaQuantum Gravity group meetingFarmanieh Seminar RoomQuantum Gravity Group Meeting Farmanieh Seminar Room Series of lectures onFarmanieh Seminar RoomSoft Matter, Biological and Statistical Physics Research Group MeetingFarmanieh Seminar RoomSpecial HEP SeminarFarmanieh Seminar Room, Class DSpecial SeminarFarmanieh, Lecture room A, Ground floorSpecial SeminarConference Hall, Farmanieh Building (1st floor)Special SeminarFarmanieh Seminar RoomSpecial SeminarFarmanieh Seminar RoomString Theory Group MeetingString Theory Group Meeting Farmanieh Seminar Room String Theory Group MeetingFarmanieh Seminar Room String Theory Group MeetingFarmanieh Seminar RoomString Theory Group MeetingFarmanieh Seminar Room Canceled From:   JanFebMarAprMayJunJulAugSepOctNovDec12345678910111213141516171819202122232425262728293031 1990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023 To:   JanFebMarAprMayJunJulAugSepOctNovDec12345678910111213141516171819202122232425262728293031 1990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023
 Wed Jun 29, 2022 (1401/4/8) Jun 291401/4/8 18:00 Disease Ecology from Perspectives of Physics Show Abstract Abstract:Here I will review my recent works [1-14] on modeling interacting contagious dynamics, for example coupled SIR or SIS dynamics, in mean field approximations and also on different random generated or empirical complex networks. I show and discuss how our recent results have been improving our understanding and prediction of epidemic dynamics and disease ecology while raising new questions and challenges in physics of critical phenomena. Also I will briefly discuss SARS-COV-2 from the perspective of disease ecology and present my recent studies on "behavioral responses to the COVID-19 spread"; which focus on the analysis and modelling of empirical data including testing strategies, air traffic, urban mobility, inequality (socio-economic classes), news spread, etc. in Iran or USA or globally. Lecturer(s): Fakhteh Ghanbarnejad From : Sharif University of Technology Research Group: Physics Colloquium More Info. : Link Wed Jun 29, 2022 (1401/4/8) Jun 291401/4/8 13:00 Fingerprinting local environments with application to machine learning interatomic potentials Show Abstract Abstract:A class of supervised machine learning approaches aims at predicting a quantity from an input data vector. For example, it is common practice to recognize a person's face from the set of data points (pixels) in a digital image frame. The same techniques are effectively useful in computational condensed matter physics problems for the prediction of atomic contributions to a given physical quantity from the arrangement of the neighboring atoms of the individual atoms. Then one needs a "descriptor" that quantifies the environment of an atom such that it can be fed as input to a supervised machine learning tool. We review the basic ideas, techniques, and challenges of fingerprinting the local environment as an essential ingredient of training interatomic potentials from e.g. ab initio reference samples. We exemplify the local fingerprinting by applying it to predict the excited and ground-state energy surfaces of large atomic systems. Lecturer(s): Ali Sadeghi From : Physics Department, Shahid Beheshti University, Tehran, Iran Research Group: Condensed Matter and Statistical Physics Group More Info. : link Tue Jun 28, 2022 (1401/4/7) Jun 281401/4/7 14:00 Distorted Black Holes in Higher Dimensions Show Abstract Abstract:In this talk, I will analyze the concept of a distorted black hole. As examples, I focus on the case of distorted black holes in higher dimensions and the most common generating techniques. In particular, I represent the distorted black ring solution and some of its interesting properties. Lecturer(s): Shohreh Abdolrahimi From : California State Polytechnic University Research Group: HEPCO Group Weekly Seminar More Info. : link Wed Jun 22, 2022 (1401/4/1) Jun 221401/4/1 14:00 Optimization by a quantum reinforcement algorithm Show Abstract Abstract:Providing an optimal path to a quantum annealing algorithm is key to find good approximate solutions to computationally hard optimization problems. Reinforcement is one of the strategies that can be used to circumvent the exponentially small energy gaps of the system in the annealing process. We take a local entropy in the configuration space for the reinforcement and apply the algorithm to a number of easy and hard optimization problems. Lecturer(s): Abolfazl Ramezanpour From : Department of Physics, School of Sciences, Shiraz University Research Group: Condensed Matter and Statistical Physics Group More Info. : link Tue Jun 21, 2022 (1401/3/31) Jun 211401/3/31 14:00 Probing charged lepton flavor violation with axion-like particles at a future muon collider Show Abstract Abstract:In this talk, after a brief review of the origin of axion-like particles (ALPs), I will show how charged lepton-flavor-violating (LFV) decays of the tau lepton (if exist) with an ALP in the final state can be probed at a future muon collider. I will explain the search scenario, challenges and strategies for mitigating the background. Finally, we will compare the expected constraints on the LFV couplings obtained in this analysis with the present experimental constraints. Lecturer(s): Gholamhossein Haghighat From : IPM, School of Particles and Accelerators Research Group: HEPCO Group Weekly Seminar More Info. : link Wed Jun 15, 2022 (1401/3/25) Jun 151401/3/25 14:00 Two-component density functional theory for muonic molecules Show Abstract Abstract: It is well-known experimentally that the positively charged muon and the muonium atom may bind to molecules and solids, and through muon�??s magnetic interaction with unpaired electrons, valuable information on the local environment surrounding the muon is deduced. Theoretical understanding of the structures and properties of the resulting muonic species requires accurate and efficient quantum mechanical computational methodologies. In this talk, the two-component density functional theory (TC-DFT) will be introduced as a possible candidate for the proper treatment of muonic systems. This approach is capable of treating the electrons and positive muon on an equal footing as quantum particles, which is beyond the domain of the purely electronic DFT framework. In addition, a novel electron-positive muon correlation functional will be offered for the first time, which serves as the main ingredient of the muonic TC-DFT methodology. The computational application of the developed method to a benchmark set of muonic organic molecules will also demonstrate its capability to elucidate the intricate interactions of the positive muon in complex molecular systems. Lecturer(s): Mohammad Goli From : IPM, School of Nano Science Research Group: Condensed Matter and Statistical Physics Group More Info. : link Tue Jun 14, 2022 (1401/3/24) Jun 141401/3/24 14:00 Quantum designs and Mutually Unbiased Measurements Show Abstract Abstract:Two orthonormal bases of a Hilbert space are said to be mutually unbiased bases (MUB) if the transition probabilities from each state of the first basis to each state of the second basis are the same, irrespective of which pair of states is chosen. A complete set of MUBs is an example of a rich combinatorial structure known as complex projective 2-designs. Mutually unbiased measurements (MUM), on the other hand, are a generalization of the mutually unbiased bases in which the measurement operators need not to be rank-one projectors. Among the various applications of MUBs and MUMs, their ability in detecting quantum entanglement is one of the most recent and interesting ones. In this talk, I will briefly introduce designs, quantum designs, and mutually unbiased measurements and describe how they can be used to detect entanglement. Lecturer(s): Seyed Javad Akhtarshenas From : Ferdowsi University of Mashhad Research Group: HEPCO Group Weekly Seminar More Info. : link Wed Jun 08, 2022 (1401/3/18) Jun 081401/3/18 14:00 Magnetic blue-shift of Mott gaps enhanced by double-exchange Mechanism Show Abstract Abstract:Strong correlations in Mott insulators induce a substantial charge excitation energy known as the Mott gap. In this talk, we discuss how the Mott gap is affected by long-range antiferromagnetic ordering upon reducing the temperature below the Neel temperature. Our finding is that the Mott gap is increased by the magnetic ordering: a magnetic blue-shift (MBS) occurs. We unveil the origin of the MBS of the Mott gap by analyzing the Hubbard model and the Hubbard-Kondo model and clarify the subtle differences. We show that in the Hubbard model the MBS is determined by the magnetic exchange coupling. In the Hubbard-Kondo model, an additional contribution proportional to the hopping is induced by the double-exchange mechanism. We describe the magnetic contribution to the band gap blue-shift observed in the optical conductivity of α-MnTe and pinpoint a hopping contribution of 64 % and a magnetic exchange contribution of 36 %. A MBS with the energy scale of the hopping and the exchange interaction bears the potential to enable spin-to-charge conversion on extreme time scales, highly promising for spintronic and magnonic applications. Lecturer(s): Mohsen Hafez Torbati From : Department of physics, Technical University of Dortmund, Germany Research Group: Condensed Matter and Statistical Physics Group More Info. : link Tue Jun 07, 2022 (1401/3/17) Jun 071401/3/17 14:00 Formation and Abundance of Late Forming Primordial Black Holes as Dark Matter Show Abstract Abstract:The 'Dark Matter' (DM) is one of the mysterious components of our universe that accounts for almost 27% of its matter-energy content. Out of all the proposed dark matter candidates, 'WIMP' was thought to be the best-fitted one, yet its undetectability proved otherwise despite a decade of search. Recently Primordial Black Hole (PBH) has emerged as one of the most potent and well-studied candidates, even though there are theoretical and observational constraints on PBHs, keeping them from contributing to the whole DM density, except for a mass window of $10^{-16}$ - $10^{-10} M_{\odot}$. Recently a late PBH formation mechanism has been proposed between the epoch of Big Bang Nucleosynthesis (BBN) and Cosmic Microwave Background (CMB) photon decoupling. A natural late phase transition around redshift $10^6 \leq z \leq 10^8$ in a strongly interacting fermion-scalar fluid gives rise to instability in the density perturbation resulting in the exponential growth of density perturbations in sub-Compton scales. It triggers the collapse and formation of an early dense halo that finally collapses into PBH due to cooling through scalar radiation. The talk's goal is to convince the audience that the PBHs formed in this manner indeed account for the total DM density of the universe and prove the existence of a temporary static phase of the halo due to the balance between fermi pressure and the attractive scalar during the PBH formation. Lecturer(s): Amlan Chakraborty From : Indian Institute of Astrophysics Research Group: HEPCO Group Weekly Seminar More Info. : link Wed Jun 01, 2022 (1401/3/11) Jun 011401/3/11 14:00 Collective cloaking of a cluster of electrostatically defined core-shell quantum dots in graphene Show Abstract Abstract:We study the cloaking of a cluster of electrostatically defined core-shell quantum dots in graphene. Guided by the generalized multiparticle Mie theory, the Dirac electron scattering from a cluster of quantum dots is addressed. Indeed distant quantum dots may experience a sort of individual cloaking. But despite the multiple scattering of an incident electron from a set of adjacent quantum dots, collective cloaking may happen. Via a proper choice of the radii and bias voltages of shells, the two most important scattering coefficients and hence the scattering efficiency of the cluster dramatically decrease. Energy-selective electron cloaks are realizable. More importantly, clusters simultaneously transparent to electrons of different energies, are achievable. Being quite sensitive to applied bias voltages, clusters of core-shell quantum dots may be used to develop switches with high on-off ratios. Lecturer(s): Mahdiyeh Sadrara From : IPM, School of Nano Science Research Group: Condensed Matter and Statistical Physics Group *** Please Search (Top of the page) to see more seminars. ***

footer