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VERSION:2.0
PRODID:Icfo
X-PUBLISHED-TTL:P1W
BEGIN:VEVENT
UID:69d0b5fe03281
DTSTART:20230828T130000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20230828T140000Z
LOCATION:Seminar Room & Online
SUMMARY:ICFO | PRINEHA NARANG
CLASS:PUBLIC
DESCRIPTION:In this talk\, I will present a pedagogical introduction of the
 oretical and computational approaches to describe excited-states in quantu
 m matter\, and predicting emergent states created by external drives. Unde
 rstanding the role of such light-matter interactions in the regime of corr
 elated electronic systems is of paramount importance to fields of study ac
 ross condensed matter physics and ultrafast dynamics1. The simultaneous co
 ntribution of processes that occur on many time and length-scales have rem
 ained elusive for state-of-the-art calculations and model Hamiltonian appr
 oaches alike\, necessitating the development of new methods in computation
 al physics. I will discuss our latest results at the intersection of ab in
 itio cavity quantum-electrodynamics and electronic structure methods to tr
 eat electrons\, photons and phonons on the same quantized footing\, access
 ing new observables in strong light-matter coupling. Current approximation
 s in the field almost exclusively focus on electronic excitations\, neglec
 ting electron-photon effects\, for example\, thereby limiting the applicab
 ility of conventional methods in the study of polaritonic systems\, which 
 requires understanding the coupled dynamics of electronic spins\, nuclei\,
  phonons and photons. With our approach we can access correlated electron-
 photon and photon-phonon dynamics2&ndash\;7\, essential to our latest work
  on driving quantum systems far out-of-equilibrium to control the coupled 
 electronic and vibrational degrees-of-freedom  8&ndash\;20. In the second 
 part of my talk\, I will demonstrate how the same approach can be generali
 zed in the context of control of molecular quantum matter and quantum tran
 sduction. As a first example\, I will discuss a cavity-mediated approach t
 o break the inversion symmetry allowing for highly tunable even-order harm
 onic generation (e.g. second- and fourth-harmonic generation) naturally fo
 rbidden in such systems. This relies on a quantized treatment of the coupl
 ed light-matter system\, similar to the driven case\, where the molecular 
 matter is confined within an electromagnetic environment and the incident 
 (pump) field is treated as a quantized field in a coherent state. When the
  light-molecule system is strongly coupled\, it leads to two important fea
 tures: (i) a controllable strong-coupling-induced symmetry breaking\, and 
 (ii) a tunable and highly efficient nonlinear conversion efficiency of the
  harmonic generation processes 21&ndash\;23. Both of these have implicatio
 ns for molecular quantum architectures. Being able to control molecules at
  a quantum level gives us access to degrees of freedom such as the vibrati
 onal or rotational degrees to the internal state structure. Finally\, I wi
 ll give an outlook on connecting ideas in cavity control of matter with qu
 antum information science.
DTSTAMP:20260404T065558Z
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