1,721,152 research outputs found
Screening effects in bipolaron theory and high temperature superconductivity
Full text linkThe subject of the book is a study on bipolaron formation in heavily doped and polar materials. The study is applied to the physics of superconducting compounds with high transition temperature
Routes to chaos for driven Bose-Einstein condensates: from fast to slow crossing regimes
No full textExperiments with ultracold atoms periodically kicked in a phase-modulated lattice have clearly shown the emergence of chaotic behaviour and realized the transition from classical to quantum chaos, in agreement with the predictions of numerical calculations. We turn our attention to Bose-Einstein condensates (BEC), presenting a systematic study of the signatures which define the dynamical transition of periodically kicked BECs to classical and quantum chaos, pointing out the role of coherence. The same type of numerical experiments are performed and analyzed for a BEC following a different route to chaos under slow, adiabatic periodical driving. Preliminary comments are then devoted to the consequences of the nonlinear atomic interactions on the phase decoherence. Our results can be relevant to current experiments with BECs. (C) 2002 Elsevier Science B.V. All rights reserved
Presto volando: Un breve viaggio nel mondo degli strumenti musicali
No full textSAPERE, rivista di divulgazione scientific
La superfluidita' di atomi fermionici: sulla natura dello stato superfluido dalle coppie di Cooper alla condensazione di Bose-Einstein
No full text
Io vado a idrogeno (2011) Video divulgativo del progetto “H3 – idrogeno come vettore energetico”
No full textvideo divulgativo del progetto “H3 – idrogeno come vettore energetico” finanziato da Regione Toscana con il cofinanziamento di Università di Pisa e Scuola Superiore Sant'Anna. Ideazione: Marilù Chiofalo e Sara P. Maggi Coordinamento: Antonio Colicelli (Università di Pisa) Riprese, montaggio, grafica: Claudio Benedetti Regia: Sara P. Maggi Produzione: Laboratorio di Cultura Digitale (Università di Pisa) Realizzato per: Università di Pisa Facoltà di Ingegneria in collaborazione con Consorzio Pont-Tech Scaricabile da http://www.unipi.it -> iTunes-
Josephson-type oscillations of a driven Bose-Einstein condensate in an optical lattice
No full textCoherent transport behaviour has been demonstrated in experiments on atomic Bose-Einstein condensates driven by an external force through a quasi one-dimensional optical lattice. We exploit the Wannier-function representation of band states to elucidate the relationship of such coherent transport with the weak-link Josephson effect and test the observability of multimode behaviour in condensates by numerical solution of the Gross-Pitaevskii equation
Nobel Donna
No full textUna serie di Perché Nobel? dedicata alle donne cui e' stato assegnato il Premio Nobel. Scaricabile da iTunes
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