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
A causa dell'emergenza coronavirus l'evento è sospeso e sarà posticipato.
Il 16 ed il 17 Marzo 2020, presso il Dipartimento di Chimica di Bari, si terrà un workshop internazionale “Laser plasmas and nanomaterials” che affronterà i temi dell’interazione laser-materia in liquido, il ruolo dei plasmi nell’ablazione in liquido e la produzione e le applicazioni dei nanomateriali così sintetizzati. Il workshop è stato congiuntamente organizzato dal Dipartimento di Chimica dell’Università di Bari e dall’Istituto di Nanotecnologia – CNR-NANOTEC di Bari.

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