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SUMMARY:Polariton condensates: a photonic platform for quantum simulation
DTSTART:20140523T141500
DTSTAMP:20260501T055549Z
UID:fe9c274a36ae4c813a36279516c9a3b3856bc2a09d36121fea1a617d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Jacqueline Bloch\, CNRS research director\, Laboratoire de
  Photonique et de Nanostructures\, LPN/CNRS\, Marcoussis\, France\nMore th
 an twenty years after their discovery\, cavity polaritons appear today as 
 a fascinating system to study the physics of interacting bosons in the pre
 sence of dissipation. Moreover the use of nanotechnology allows full engin
 eering of the potential geometry undergone by polaritons. Thus it becomes 
 now possible to experimentally implement complex polariton Hamiltonians\, 
 a first step toward quantum simulation. In this seminar\, I will illustrat
 e these recent developments describing some experimental works performed o
 n polariton condensates confined in microstructures\, and manipulated in p
 hotonic circuits. I will show how the ballistic propagation properties of 
 polariton condensates can be used to implement a variety of optically cont
 rolled polariton devices [1-2]: the example of a nonlinear resonant tunnel
 ing polariton diode will be addressed\, a device very promising to reach t
 he quantum regime of polariton blockade [1]. The very same device can be u
 sed to implement a sonic black hole for polaritons. The second part of the
  talk will be devoted to the physics of polaritons in lattices. I will dis
 cuss polariton condensation in a 1D periodic potential [3]\, as well as th
 e observation of a fractal energy spectrum in a quasi-periodic structure [
 4]. Optical measurements\nperformed on a polaritonic 2D honeycomb lattice 
 will be shown: Dirac cones and a flat band are directly revealed [5]. Thes
 e examples highlight the great potential of semiconductor cavities as a ne
 w platform to investigate the physics of interacting bosons and realize qu
 antum simulations.\nReferences\n[1] Realization of a double barrier resona
 nt tunneling diode for cavity polaritons\, H-.S. Nguyen et al.\, Phys. Rev
 . Lett. 110\, 236601 (2013)\n[2] All-optical phase modulation in a cavity-
 polariton Mach-Zehnder interferometer \, C. Sturm et al.\, Nature Communic
 ations 5\, 3278 (2014)\n[3] Polariton condensation in solitonic gap states
  in a one-dimensional periodic potential\, D. Tanese et al.\, Nature Commu
 nications 4\, 1749 (2013)\n[4] Fractal energy spectrum of a polariton gas 
 in a Fibonacci quasi-periodic potential\, D. Tanese\, Phys. Rev. Lett. 112
 \, 146404 ( 2014)\n[5] Direct observation of Dirac cones and a flatband in
  a honeycomb lattice for polaritons\, T. Jacqmin et al.\, Phys Rev Lett 11
 2\, 116402 (2014)
LOCATION:PH L1 503 (Aquarium) http://plan.epfl.ch/?room=PHL1503
STATUS:CONFIRMED
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