Master Matière Condensée Et Nanophysique

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Master Matière Condensée et Nanophysique Année universitaire : 2014/2015 Nom du responsable et intitulé du laboratoire d’accueil : Stefan Haacke - IPCMS Adresse : Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Département d'Optique ultrarapide et Nanophotonique (DON), 23, rue du Loess - BP 43 - 67034 Strasbourg Cedex Responsables de stage : HERVIEUX Paul-Antoine (PU), MANFREDI Giovanni (DR) Téléphone : 03 88 10 72 14 Fax : 03 88 10 72 45 E-mail : [email protected], [email protected] Group web page: http://dyno.u-strasbg.fr/ Title: The physics of dropletons A new quantum state of matter (called dropleton) has been discovered very recently [1]. A dropleton is a quantum system composed of many correlated electron-hole pairs (“quantum droplet”) that can arise in a semiconductor quantum well irradiated by ultrashort optical pulses. It constitutes the latest addition to the “periodic table” of quasiparticles in solids. The present project has the ambition to understand the physics behind this fascinating new state of matter. In particular, the static and dynamical properties (linear and nonlinear response) will be studied theoretically and numerically using a methodology recently developed in our group and originally applied to electron-positron clusters [2]. The envisaged approach is based on a two- component quantum hydrodynamic model that incorporates the kinetic energy, the Coulomb interaction, and the exchange energy, but neglects higher-order correlations. Further, using a variational approach, the linear response and nonlinear properites of the system can be studied. The dropleton formation will also be explored using quantum kinetic methods previously developed in our group for studying the Bose-Einstein condensation dynamics in atomic gases [3]. References *1+ “Quantum droplets of electrons and holes”, A. E. Almand-Hunter et al., Nature 506, 471 (2014). [2] "Nonlinear dynamics of electron–positron clusters", G. Manfredi, P. -A. Hervieux and F. Haas, New J. Phys. 14, 075012 (2012). [3] "Bose-Einstein-condensation dynamics with a quantum-kinetic approach", O. Morandi, P. -A. Hervieux and G. Manfredi, Phys. Rev. A 88, 023618 (2013). .

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