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UID:0-795@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20220125T110000
DTEND;TZID=Europe/Paris:20220125T120000
DTSTAMP:20220116T114759Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-jacqueline-bloch-c2n/
SUMMARY:Séminaire du LPTMS : Jacqueline Bloch (C2N) - Petit amphi\, bâtim
 ent Pascal n° 530 - 25 Jan 22 11:00
DESCRIPTION:Using cavity polariton lattices as analog simulators\nJacquelin
 e Bloch (Center for Nanoscience and Nanotechnology)\nHybrid seminar: onsi
 te + zoom.\n\nZoom link: https://cnrs.zoom.us/j/97201630000?pwd=MlhLSFBtU
 kJQcXZDdXZHWkQrRm9hUT09\n\nMeeting ID: 972 0163 0000\nPasscode: 36PnNs\n\n
 An analog simulator is a synthetic physical system\, which emulates in a c
 ontrolled way a physical problem. You can get answers about the physical p
 roblem by directly performing experiments on the simulator. This approach 
 is particularly relevant for quantum problems where computation times grow
 s exponentially with the system’s size. In the present seminar\, I will 
 present the polariton platform and explain how it is relevant for analog s
 imulation of many interesting open problems. \n\nCavity polaritons are hy
 brid exciton-photon quasi-particle emerging from the strong coupling regim
 e between photons confined in an optical cavity and excitons confined in q
 uantum wells. They present physical properties reflecting their mixed natu
 re. From the photon part\, they inherit a small effective mass and can be 
 confined in lattices with typical dimensions of the order of a few microns
 . Their excitonic part endows them with inter-particle interactions result
 ing  in a giant Kerr non linearity. Moreover the system is intrinsically 
 open and out of equilibrium because photons constantly leak out from the c
 avity. Cavity polaritons have been shown to present fascinating properties
  such as Bose Einstein condensation at elevated temperature\, superfluidit
 y\, multistability etc [1].\n\nIn the present talk\, I will explain how th
 e polariton plateform is particularly suitable to realize analog simulatio
 n of open complex systems and explore fundamental physical phenomena.\n\nI
  will describe a few recent results of our group: \n\n 	How do wave local
 ize in exotic quasi-crystals and how fractality does develop? This physics
  can be emulated with polariton lattices [2]\n 	Polariton condensates are 
 out of equilibrium and their phase dynamics has been predicted to obey the
  celebrated Kardar Parisi Zhang (KPZ) equation. We have been able to revea
 l experimentally universal KPZ scaling laws in the first order coherence o
 f a 1D polariton condensate.[3]\n 	Polariton lattices are also very intere
 sting for the investigation of topological photonics. In particular\, the 
 ability to drive the system with controlled phases opens a new paradigm fo
 r non-linear topological photonics. [4] \n\nReferences :\n\n[1]  Ciuti &
 amp\; I. Carusotto\, Quantum fluids of light\, Rev. Mod. Phys. 85\, 299 (2
 013)\n\n[2] V. Goblot et al. Emergence of criticality through a cascade of
  delocalization transitions in quasiperiodic chains\, Nature Physics 16\, 
 832 (2020)\n\n[3] Q. Fontaine et al.\, Observation of KPZ universal scalin
 g in a one-dimensional polariton condensate\, arXiv:2112.09550 (2021)\n\n[
 4] N. Pernet et al.\, N. Pernet\, et al.\, Topological gap solitons in a 1
 D non-Hermitian lattice\, arXiv:2101.01038 (to appear 2022)
CATEGORIES:seminars
LOCATION:Petit amphi\, bâtiment Pascal n° 530\, rue André Rivière\, Ors
 ay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Rivière\, Orsay
 \, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Petit amphi\, bâtiment Pasca
 l n° 530:geo:0,0
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