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Seminars

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  • Title:Unification of entanglement criteria and Bose-Einstein Condeusates
  • Start Date/Time:2019-05-14 / 11:00
  • End Date/Time :2019-05-14 / 12:30
    • Speaker:Mehmet Emre Tasgin (Hacettepe Universitesi, Nukleer Bilimler Enstitusu)
    • Place:Lecture room A of NCTS, 4F, 3rd General Building, Nat'l Tsing Hua Univ.
    • Host:Prof. Ray-Kuang Lee (NTHU)
    • Abstract:
      I show that (i) two-mode entanglement, (ii) many-particle entanglement and (iii) single-mode nonclassicality criteria are intimately connected to each other. For instance, quadrature squeezing (a single-mode nonclassicality) criterion can be obtained from the spin-squeezing (a many-particle entanglement) criterion. Next, I show that one can obtain a new many-particle entanglement criterion from the photon number-squeezing (Mandel’s Q parameter, or sub-Poissonian) single-mode criterion. I show that this criterion can witness entanglement in states, where spin-squeezing and other criteria fail. 
      ‧It can witness the onset of many-particle entanglement in some phase transitions.
      ‧It can predict the onset of coherence in a condensate, induced by collisions, as observed in the experiments.
      ‧It can distinguish between different subradiant states in single-photon superradiance. 
      ‧It can detect entanglement of many emitters induced by a single-plasmon source.
       
      At the end of the talk, I will also mention very briefly about quantification for multi-mode entanglement [2], entanglement of two BEC components [3] and symmetry breaking rotatory-superradiance in BECs [4], and a new strong entanglement criterion for number-like states [5].
       
      [1] M. E. Tasgin, Many-particle entanglement criterion for superradiant-like states, Phys. Rev. Lett. 119, 033601 (2017).  arXiv:1610.06883
      [2] M. E. Tasgin and M.S. Zubairy, Quantifications for multi-mode entanglement, arXiv:1905.01740
      [3] M. Gunay, O.E. Mustecaplioglu and M.E. Tasgin, Entanglement of two interacting ensembles via a Dicke-like quantum phase transition, arXiv:1904.12668
      [4] Priyam Das, Mehmet Emre Tasgin and Ozgur E. Mustecaplioglu, Collectively induced many-vortices topology via rotatory Dicke quantum phase transition, New J. Phys. 18, 093022 (2016).  arXiv:1601.06413
      [5] M.E. Tasgin, Anatomy of entanglement and nonclassicality criteria, arXiv:1901.04045
       
    • Detailed contents: 
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