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 Seminar Condensed 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
 Tue Aug 02, 2022 (1401/5/11) Aug 021401/5/11 14:00 Generalized Volume-Complexity For Two-Sided Hyperscaling Violating Black Branes Show Abstract Abstract:In this talk, I will first briefly review generalized volume-complexity $\mathcal{C}_{\rm gen}$ which was recently introduced in [arXiv:2111.02429]. This quantity is an extension of volume in the Complexity=Volume (CV) proposal, by adding higher curvature corrections with a coupling constant $\lambda$ to the volume functional. Next, I will talk about the calculation of $\mathcal{C}_{\rm gen}$ for two-sided Hyperscaling Violating (HV) black branes in $d+2$ dimensions for different values of the hyperscaling violation exponent $\theta$ and dynamical exponent $z$. It is observed that $\mathcal{C}_{\rm gen}$ always grows linearly at late times provided that we choose $\lambda$ properly. Moreover, it approaches its late time value from below. I will also discuss the dependence of the growth rate of $\mathcal{C}_{\rm gen}$ on $d$, $\theta$, $z$ and $\lambda$. In the end, I will report our results for the complexity of formation obtained from volume-complexity and show that it is not UV divergent. I will also discuss its dependence on the thermal entropy and temperature of the black brane. Lecturer(s): Farzad Omidi From : School of Physics, IPM Research Group: HEPCO Group Weekly Seminar More Info. : link Tue Jul 26, 2022 (1401/5/4) Jul 261401/5/4 14:00 On complex coordinate transformations Show Abstract Abstract:Abstract Since the Newman-Janis paper, we know an exciting complex coordinate transformation that maps Schwarzschild solution to Kerr and Reissner�??Nordström to Kerr-Newman. A similar transformation maps the Coulomb field to a fascinating electromagnetic field dubbed "the magic field". Other complex coordinate or mixed parameter-coordinate transformations map solutions of Einstein-Maxwell theory into each other. I review some of these transformations and comment on the Newman-Janis as well as another complex transformation that preserves the Kerr-NUT set of solutions. Lecturer(s): Sajad Aghapour From : Max Planck Institute Research Group: HEPCO Group Weekly Seminar More Info. : Link Tue Jul 19, 2022 (1401/4/28) Jul 191401/4/28 14:00 Remarks on memory effect, electric-magnetic duality, and holonomy Show Abstract Abstract:I will describe some aspects of the "gravitational electric-magnetic duality". Then, I will show that the generator of this symmetry appears naturally in the net rotation caused by gravitational waves on the spin of a freely falling gyroscope. Then latter, which we call the "gyroscopic memory" is in principle observable. Lecturer(s): Ali Seraj From : Centre for Gravitational Waves, university of bruxelles Research Group: HEPCO Group Weekly Seminar More Info. : link Tue Jul 12, 2022 (1401/4/21) Jul 121401/4/21 14:00 Accelerating black holes: Gravitational lensing and timelike geodesics Show Abstract Abstract:Abstract Accelerating supermassive black holes, connected to cosmic strings, could contribute to structure formation and get captured by galaxies if their velocities are small. This would mean that the acceleration of these black holes is small too. Such a slow acceleration has no significant effect on the shadow of such supermassive black holes. We also show that, for slowly accelerating black holes, the angular position of images in the gravitational lensing effects does not change significantly. We propose a method to observe the acceleration of these black holes through gravitational lensing. The method is based on the observation that differential time delays associated with the images are substantially different with respect to the case of non-accelerating black holes. We also study the geodesics of massive particles around accelerating Schwarzschild black holes. Lecturer(s): Mohammad Bagher Jahani Poshteh From : School of Physics,IPM Research Group: HEPCO Group Weekly Seminar More Info. : Link Tue Jul 12, 2022 (1401/4/21) Jul 121401/4/21 12:13 Valorization of carbon dioxide to cyclic carbonate using silica/organosilica mesoporous materials Show Abstract Abstract:In recent years, human activities, the rapid growth of industrialization, and especially the uncontrolled combustion of fossil fuels have unfortunately resulted in the increase of atmospheric concentration of carbon dioxide (CO2), as a component of greenhouses gases. The long-term effects of this trend have ensued global warming, ice melting, ocean warming, sea-level rising, and ocean acidification which are overall defined as global climate change. Consequently, the development of new carbon capture and utilization systems enabled to minimize CO2 emissions, has become the hottest topic in the scientific communities. On the other hand, CO2 is turned over in the organic chemist's mind as a resource rather than a waste product since it is an abundant, non-toxic, cheap, and renewable C1 feedstock. Therefore, the conversion of anthropogenic CO2 into high value-added chemicals, if performed in a promising sustainable approach, is receiving considerable and ever-increasing attentions. In this context, the direct coupling of CO2 with epoxides not only is significantly interested owing to the eco-friendly and more carbon-balanced approach, but also the resulting five-membered cyclic carbonates are widely used as polar aprotic solvents, electrolytes in lithium-ion batteries, and chemical intermediates in fine chemicals syntheses. However, CO2 is thermodynamically stable and the use of the catalyst for this conversion would be mandatory. Despite a variety of metal and organocatalysts have been so far reported for cyclization reaction between carbon dioxide and epoxides, the development of simple and low-cost systems which met eco-friendly, green and sustainable chemistry viewpoints, under solvent-free and mild temperature (<100 °C) and pressure (1-10 bar) have remained with many challenges. In this presentation, I am going to talk about our recent supported metal and organocatalysts on the mesoporous materials that have been described for direct CO2 valorization to cyclic carbonate. Lecturer(s): Mojtaba Khorasani From : Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran Research Group: Condensed Matter and Statistical Physics Group More Info. : Link Wed Jul 06, 2022 (1401/4/15) Jul 061401/4/15 14:00 Quasiparticle properties in doped monolayer MoS2 Show Abstract Abstract:One of the appealing features of MoS2 and TMDs, in general, is their external controllability of the quantum many-body properties. In particular, the environmental sensitivity of the Coulomb interaction in these materials is remarkable which has crucial consequences in the determination of the quasiparticle properties through further screening effects. In this talk, I will present a theoretical analysis in order to determine a comprehensive picture of the quasiparticle features of monolayer MoS2 and also of the extrinsic variables affecting them based on a full random-phase-approximation (RPA) self-energy calculation in the framework of Landau Fermi liquid theory. I will show how the quasi-2D character of the Coulomb interaction in this system tends to stabilize the Fermi liquid picture. Also, the important quasiparticle band-gap renormalization induced by the doped carriers in monolayer MoS2 will be discussed Lecturer(s): Azadeh Faridi From : School of Physics,IPM Research Group: Condensed Matter and Statistical Physics Group More Info. : Link 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 *** Please Search (Top of the page) to see more seminars. ***

footer