BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:CECAM Workshop: "Atto2Nano: Modeling ultrafast dynamics across tim
 e-scales in condensed matter"
DTSTART:20230926T120000
DTEND:20230929T125000
DTSTAMP:20260408T060125Z
UID:cb7f5902db65abcec0d92f8f6722c575acfbcadc21f3105e4b9da0a9
CATEGORIES:Conferences - Seminars
DESCRIPTION:You can apply to participate and find all the relevant informa
 tion (speakers\, abstracts\, program\,...) on the event website: https://
 www.cecam.org/workshop-details/1193\n\nDescription:\nThe wide range of eme
 rgent phenomena and quasiparticles arising from excitation\, correlation\,
  and coherence of electrons\, spin\, photons\, and nuclei provides a weal
 th of largely unexplored possibilities to achieve properties on demand in
  advanced materials [BAS17]. Achieving control of these phenomena constit
 utes the key to the formulation of novel technology concepts based on quan
 tum materials [GIU21]. However\, this requires a detailed understanding o
 f light-matter coupling in many-body systems out of equilibrium via predi
 ctive ab-initio methods and semi-empirical approaches suitable to simulate
  time-resolved ultrafast dynamics [TOR21].\nModelling non-equilibrium dyn
 amics in solids involves capturing a wide and diverse landscape of 
 excitations (Floquet states\, excitons\, polaritons\, magnons) and fundame
 ntal interaction mechanisms (light-matter\, electron-exciton-phonon\, spin
 -phonon\, etc.) spanning different time and length scales\, as well as 
 different levels of complexity. In recent years\, a significant progress
  was attained in experimental [SEI21]\, theoretical [PER19]\, and comp
 utational [QIU21] capabilities to explore ultrafast processes ranging f
 rom attoseconds to nanoseconds [GIN20\, PER19\, CHE20\, SME20\, DEG20\, CH
 A21\, QIU21\, HEL21] thus enabling new routes and perspectives for the
  reliable prediction of excited-state dynamics in advanced materials. T
 he extension of quantum electrodynamics and non-equilibrium Green function
 s [MAR13\, PER19] to the domain of ab-initio methods has enabled to desc
 ribe the quantum kinetics of electrons and photons at the atto- and femtos
 econd timescales\, respectively\, yielding unprecedented information on 
 the formation\, dynamics\, and decay of coupled light-matter states and 
 many-body excitations. Ab-initio molecular dynamics and perturbative tech
 niques can provide insight into the non-equilibrium phonon and structural 
 dynamics for timescales up to tens or hundreds of picoseconds.\nMany-body
  interactions among electrons\, magnons\, excitons\, phonons\, and photons
  in systems out of equilibrium constitute a major challenge for both ab-in
 itio [ATT11\, CHE20\, ANT22] and semi-empirical approaches [CHR19\, PAV
 22\, PER22]. In spite of the remarkable progress in the theoretical descri
 ption of ultrafast processes – such as\, e.g.\, coherent phonon excitati
 ons [HÜB18\, SHI18\, TRO20]\, driven topological insulators [GAT20\, SCH
 20]\, two dimensional semiconductors [AES21] and  magnetic systems [ELL16
 \, PRE21] –\, the rich interplay of several coupling mechanisms and man
 y-body interactions across multiple length and time scales often hinders a
  thorough theoretical understanding of non-equilibrium phenomena in advanc
 ed materials. These considerations outline the urgency of establishing nov
 el concepts to bridge spatio-temporal scales in the theory of ultrafast ph
 enomena and their implementation in efficient computational methods.\nThis
  workshop aims at bringing together researchers with complementary experti
 se in the field of experimental and theoretical ultrafast science. In part
 icular\, the goal of this event is to stimulate discussion and exchange on
  bridging time-scales in both ab-initio and semi-empirical approaches for 
 non-equilibrium phenomena\, focusing on time-scales ranging from attosecon
 ds to nanoseconds. While the primary focus of the workshop will be on theo
 retical and numerical modelling of ultrafast dynamics\, we intend to foste
 r participation of few leading experimentalists from the area of time-reso
 lved spectroscopy and microscopy. Our aim is to generate an open and dive
 rse environment that will stimulate discussions and collaborations on new 
 theoretical and computational horizons for the description of non-equilibr
 ium dynamics and time-resolved excited-state phenomena.\n \nReferences\n
  \nThe wide range of emergent phenomena and quasiparticles arising from e
 xcitation\, correlation\, and coherence of electrons\, spin\, photons\, an
 d nuclei provides a wealth of largely unexplored possibilities to achiev
 e properties on demand in advanced materials [BAS17]. Achieving control o
 f these phenomena constitutes the key to the formulation of novel technolo
 gy concepts based on quantum materials [GIU21]. However\, this requires a
  detailed understanding of light-matter coupling in many-body systems out 
 of equilibrium via predictive ab-initio methods and semi-empirical approa
 ches suitable to simulate time-resolved ultrafast dynamics [TOR21].\nMode
 lling non-equilibrium dynamics in solids involves capturing a wide and
  diverse landscape of excitations (Floquet states\, excitons\, polarit
 ons\, magnons) and fundamental interaction mechanisms (light-matter\, elec
 tron-exciton-phonon\, spin-phonon\, etc.) spanning different time and le
 ngth scales\, as well as different levels of complexity. In recent years
 \, a significant progress was attained in experimental [SEI21]\, theo
 retical [PER19]\, and computational [QIU21] capabilities to explore ult
 rafast processes ranging from attoseconds to nanoseconds [GIN20\, PER19\, 
 CHE20\, SME20\, DEG20\, CHA21\, QIU21\, HEL21] thus enabling new routes a
 nd perspectives for the reliable prediction of excited-state dynamics i
 n advanced materials. The extension of quantum electrodynamics and non-e
 quilibrium Green functions [MAR13\, PER19] to the domain of ab-initio met
 hods has enabled to describe the quantum kinetics of electrons and photon
 s at the atto- and femtosecond timescales\, respectively\, yielding unpr
 ecedented information on the formation\, dynamics\, and decay of coupled
  light-matter states and many-body excitations. Ab-initio molecular dynam
 ics and perturbative techniques can provide insight into the non-equilibri
 um phonon and structural dynamics for timescales up to tens or hundreds o
 f picoseconds.\nMany-body interactions among electrons\, magnons\, exciton
 s\, phonons\, and photons in systems out of equilibrium constitute a major
  challenge for both ab-initio [ATT11\, CHE20\, ANT22] and semi-empirical
  approaches [CHR19\, PAV22\, PER22]. In spite of the remarkable progress 
 in the theoretical description of ultrafast processes – such as\, e.g.\,
  coherent phonon excitations [HÜB18\, SHI18\, TRO20]\, driven topologica
 l insulators [GAT20\, SCH20]\, two dimensional semiconductors [AES21] and 
  magnetic systems [ELL16\, PRE21] –\, the rich interplay of several co
 upling mechanisms and many-body interactions across multiple length and ti
 me scales often hinders a thorough theoretical understanding of non-equili
 brium phenomena in advanced materials. These considerations outline the ur
 gency of establishing novel concepts to bridge spatio-temporal scales in t
 he theory of ultrafast phenomena and their implementation in efficient com
 putational methods.\nThis workshop aims at bringing together researchers w
 ith complementary expertise in the field of experimental and theoretical u
 ltrafast science. In particular\, the goal of this event is to stimulate d
 iscussion and exchange on bridging time-scales in both ab-initio and semi-
 empirical approaches for non-equilibrium phenomena\, focusing on time-scal
 es ranging from attoseconds to nanoseconds. While the primary focus of the
  workshop will be on theoretical and numerical modelling of ultrafast dyna
 mics\, we intend to foster participation of few leading experimentalists f
 rom the area of time-resolved spectroscopy and microscopy. Our aim is to 
 generate an open and diverse environment that will stimulate discussions a
 nd collaborations on new theoretical and computational horizons for the de
 scription of non-equilibrium dynamics and time-resolved excited-state phen
 omena.\n \nReferences\n \n[AES21] S. Aeschlimann\, S. A. Sato\, R. Krau
 se\, M. Chávez-Cervantes\, U. De Giovannini\, H. Hübener\, S. Forti\, C.
  Coletti\, K. Hanff\, K. Rossnagel\, A. Rubio\, I. Gierz\, “Survival of 
 Floquet–Bloch States in the Presence of Scattering”. Nano Lett. 21\,
  5028 (2021).\n[ANT22] G. Antonius\, S. G. Louie\, "Theory of exciton-phon
 on coupling"\, Phys. Rev. B 105\, 085111 (2022).\n[ATT11] C. Attaccalite\,
  M. Grüning\, A. Marini. "Real-time approach to the optical properties of
  solids and nanostructures: Time-  dependent Bethe-Salpeter equation"\, P
 hys. Rev. B 84\, 245110 (2011).\n[BAS17] D. N. Basov\, R. D.  Averitt\, D
 . Hsieh\, “Towards properties on demand in quantum materials”\, Nat. M
 ater. 16\, 1077 (2017).\n[CHA21] Chan\, Y.-H.\, D. Y. Qiu\, F. H. da Jorn
 ada\, S. G. Louie. "Giant exciton-enhanced shift currents and direct curre
 nt conduction with subbandgap photo excitations produced by many-electron 
 interactions." Proc. Nat. Acad. Sci. 118\, 25 (2021).\n[CHE20] Chen\, H.-Y
 \, D. Sangalli\, M. Bernardi. "Exciton-phonon interaction and relaxation 
 times from first principles." Phys. Rev. Lett. 125\,107401 (2020).\n[CHR19
 ] D. Christiansen\, M. Selig\, E. Malic\, R. Ernstorfer\, A. Knorr. "Theor
 y of exciton dynamics in time-resolved ARPES: Intra- and intervalley scatt
 ering in two-dimensional semiconductors". Phys. Rev. B 100\, 205401 (2019)
 .\n[DEG20] U. De Giovannini\, H. Hübener\, S. A. Sato\, A. Rubio. "Direct
  measurement of electron-phonon coupling with time-resolved ARPES." Phys. 
 Rev. Lett. 125\, 136401 (2020).\n[ELL16] P. Elliot\, K. Krieger\, J. K. De
 whurst\, S. Sharma\, E. K. U. Gross\, "Optimal control of laser-induced sp
 in–orbit mediated ultrafast demagnetization"\, New J. Phys. 18\, 013014 
 (2016).\n[GAT20] G. Gatti. et al. “Light-Induced Renormalization of th
 e Dirac Quasiparticles in the Nodal-Line Semimetal ZrSiSe”. Phys. Rev. L
 ett. 125\, 076401 (2020).\n[GIN20] Ginsberg\, N. S.\, W. A. Tisdale. "Spa
 tially resolved photogenerated exciton and charge transport in emerging se
 miconductors." Ann. Rev. Phys. Chem. 71\, 1 (2020).\n[GIU21] F. Giustino 
 et al.\, "The 2021 quantum materials roadmap" J. Phys. Mater. 3\, 042006 
 (2021).\n[HEL21] Helmrich\, S.\, K. Sampson\, D. Huang\, M. Selig\, K.Hao\
 , K. Tran\, et al. "Phonon-Assisted Intervalley Scattering Determines Ultr
 afast Exciton Dynamics in MoSe2 Bilayers." Phys. Rev. Lett. 127\, 157403 (
 2021).\n[HÜB18] H. Hübener\, U. De Giovannini\, A Rubio\, “Phonon Driv
 en Floquet Matter”. Nano Lett. 18\, 1535 (2018).\n[MAR13] A. Marini\, 
 "Competition between the electronic and phonon–mediated scattering chann
 els in            the out–of–equilibrium carrier dynamics of
  semiconductors: an ab-initio approach" J. Phys.: Conf. Ser. 427 012003 (
 2013).\n[PAV22] Y. Pavlyukh\, E. Perfetto\, D. Karlsson\, R. van Leeuven\,
  and G. Stefanucci\, “Time-linear scaling nonequilibrium Green's functio
 n methods for real-time simulations of interacting electrons and bosons”
 \, Phys. Rev. B 105\, 125134 and 125135 (2022)\n[PER19] Perfetto\, E.\, D.
  Sangalli\, M. Palummo\, A. Marini\, G. Stefanucci. "First-principles none
 quilibrium green’s function approach to ultrafast charge migration in gl
 ycine." J. Chem. Theory and Comput. 15\, 4526 (2019).\n[PER22] E. Perfett
 o\, Y. Pavlyukh\, G. Stefanucci\, “Real-Time GW: Toward an Ab Initio Des
 cription of the Ultrafast Carrier and Exciton Dynamics in Two-Dimensional 
 Materials”\, Phys. Rev. Lett. 128\, 016801 (2022)\n[PRE21] F. Pressacco\
 , D. Sangalli et al. "Subpicosecond metamagnetic phase transition driven b
 y non-equilibrium electron dynamics" Nat. Comm. 12\, 088 (2021).\n[QIU21] 
 Qiu\, D. Y.\, G. Cohen\, D. Novichkova\, S. Refaely-Abramson. "Signatures 
 of Dimensionality and Symmetry in Exciton Band Structure: Consequences for
  Exciton Dynamics and Transport." Nano Lett. 21\, 7644 (2021).\n[RAJ19] 
 A. Raja\, L. Waldecker\, J. Zipfel\, Y. Cho\, S. Brem\, J. D. Ziegler
 \, M. Kulig\, T. Taniguchi\, K. Watanabe\, E. Malic\, T. F. Heinz\, T
 . C. Berkelbach\, A. Chernikov\, "Dielectric disorder in two-dimensional
  materials" Nature Nanotec. 14\, 832 (2019).\n[SCH20] M. Schüler\, U.
  De Giovannini\, H. Hübener\, A. Rubio\, M. A. Sentef\, T. P. Devereaux\
 , P. Werner\,  “How Circular Dichroism in Time- and Angle-Resolved Phot
 oemission Can Be Used to Spectroscopically Detect Transient Topological St
 ates in Graphene”. Phys Rev X 10\, 041013 (2020).\n[SEI21] H. Seiler\,
  D. Zahn\, M. Zacharias\, P. Hildebrandt\, T. Vasileiadis\, Y. W. Windsor\
 , Y. Qi\, C. Carbogno\, C. Draxl\, R. Ernstorfer\, F. Caruso\,  "Accessi
 ng the anisotropic non-thermal phonon populations in black phosphorus"\, 
 Nano Lett. 21\, 6171 (2021).\n[SHI18] D. Shin\, H. Hübener\, U. De Giovan
 nini\, H. Jin\, A. Rubio\, N. Park “Phonon-driven spin-Floquet magneto-v
 alleytronics in MoS2” Nat. Comm. 9\, 638 (2018).\n[SME20] Smejkal\, V.
 \, F. Libisch\, A. Molina-Sanchez\, C. Trovatello\, L. Wirtz\, A. Marini. 
 "Time-dependent screening explains the ultrafast excitonic signal rise in 
 2D semiconductors." ACS nano 15\, 1179 (2020).\n[TOR21] A. de la Torre\, D
 . M. Kennes\, M. Claassen\, S. Gerber\, J. W. McIver\, M. Sentef\, "Nonthe
 rmal pathways to ultrafast control in quantum materials"  Rev. Mod. Phys.
  93\, 041002 (2021).\n[TRO20] C. Trovatello et al.\, “Strongly coupled c
 oherent optical phonons” ACS Nano 14\, 5700 (2020)
LOCATION:BCH 2103 https://plan.epfl.ch/?room==BCH%202103
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR