Jan 10, 2020
Publication
Directional Goldstone waves in polariton condensates close to equilibrium
Quantum fluids of light are realized in semiconductor microcavities using exciton-polaritons, solid-state quasi-particles with a light mass and sizeable interactions. Here, we use the microscopic analogue of oceanographic techniques to measure the excitation spectrum of a thermalised polariton condensate. Increasing the fluid density, we demonstrate the transition from a free-particle parabolic dispersion to a linear, sound-like Goldstone mode characteristic of superfluids at equilibrium. Notably, we reveal the effect of an asymmetric pumping by showing that collective excitations are created with a definite direction with respect to the condensate. Furthermore, we measure the critical sound speed for polariton superfluids close to equilibrium.
Nature Communications - 11, 217 (2020)
Jan 15, 2020
Award
Scholar-in-Training AACR Award to Marta Cavo.
Marta Cavo, INTERCELLMED-ERC postdoc fellow at CNR-Nanotec in Lecce (IT), was awarded the "Scholar-in-Training Award" (USD $625) by the American Association for Cancer Research (AACR). The selection rewards her participation in the international conference "The Evolving Landscape of Cancer Modeling", organized by the American Association for Cancer Research (AACR), to be held on March 2-5, 2020 in San Diego, California, where she will present the work "Quantifying stroma-tumor cell interactions in three-dimensional cell culture systems".
Due to novel coronavirus (COVID-19) outbreak, the AACR2020 meeting is being planned for later this year.
Mar 16-17, 2020
EventWorkshop
International Workshop - Laser plasmas and nanomaterials
Due to coronavirus emergency the event is suspended and will be posticipated.
On 16 and 17 March 2020, at the Department of Chemistry in Bari, an international workshop "Laser plasmas and nanomaterials" will be held, which will address the issues of laser-matter interaction in liquid, the role of plasmas in liquid ablation and the production and applications of nanomaterials synthesized as follows. The workshop has been jointly organized by the Department of Chemistry of the University of Bari and the Institute of Nanotechnology - CNR-NANOTEC of Bari.

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