5,283 research outputs found
Pairing effects in the normal phase of a two-dimensional Fermi gas
No full textIn recent experiments [1, 2], a pairing gap was detected in a two-dimensional (2D)
Fermi gas with attractive interaction at temperatures where superfluidity does not occur.
A relevant question is whether this gap is a pseudogap phenomenon or is due to a molecular
state, which is always present in 2D. In this talk I will discuss how the boundary between
the pseudogap and molecular regimes can be set, and compare the theoretical results
obtained by using a t-matrix approach [3] with the above experimental data for a 2D
Fermi gas. I will also show that pseudogap phenomena occurring in 2D and 3D can be
related through a variable spanning the BCS-BEC crossover in a universal way.
[1] M. Feld, B. Fr ̈ohlich, E. Vogt, M. Koschorreck, and M. K ̈ohl, Nature 480, 75 (2011).
[2] P. A. Murthy, M. Neidig, R. Klemt, L. Bayha, I. Boettcher, T. Enss, M. Holten, G. Z ̈urn,
P. M. Preiss, and S. Jochim, arXiv:1705.10577 (2017).
[3] F. Marsiglio, P. Pieri, A. Perali, F. Palestini, and G. C. Strinati, Phys. Rev. B 91, 054509
(2015
Affine Pieri rule for periodic Macdonald spherical functions and fusion rings
No full textLet gˆ be an untwisted affine Lie algebra or the twisted counterpart thereof (which excludes the affine Lie algebras of type BCˆn=A2n(2)). We present an affine Pieri rule for a basis of periodic Macdonald spherical functions associated with gˆ. In type Aˆn−1=An−1(1) the formula in question reproduces an affine Pieri rule for cylindric Hall-Littlewood polynomials due to Korff, which at t=0 specializes in turn to a well-known Pieri formula in the fusion ring of genus zero slˆ(n)c-Wess-Zumino-Witten conformal field theories.Applied Probabilit
Kraśkiewicz-Pragacz Modules and Pieri and Dual Pieri Rules for Schubert Polynomials
No full textIn their 1987 paper Kra\\u27skiewicz and Pragacz defined certain modules \smod_w (), which we call KP modules, over the upper triangular Lie algebra whose characters are Schubert polynomials. In a previous work the author showed that the tensor product of KP modules always has a KP filtration, i.e. a filtration whose each successive quotients are isomorphic to KP modules. In this paper we explicitly construct such filtrations for certain special cases of these tensor product modules, namely \smod_w \otimes S^d(K^i) and \smod_w \otimes \bigwedge^d(K^i), corresponding to Pieri and dual Pieri rules for Schubert polynomials
Kraskiewicz-Pragacz modules and Pieri and dual Pieri rules for Schubert polynomials
No full textIn their 1987 paper Kraskiewicz and Pragacz defined certain modules, which we call KP modules, over the upper triangular Lie algebra whose characters are Schubert polynomials. In a previous work the author showed that the tensor product of Kraskiewicz-Pragacz modules always has KP filtration, i.e. a filtration whose each successive quotients are isomorphic to KP modules. In this paper we explicitly construct such filtrations for certain special cases of these tensor product modules, namely Sw Sd(Ki) and Sw Vd(Ki), corresponding to Pieri and dual Pieri rules for Schubert polynomials
In nova corpora: evoluzioni e metamorfosi dell'uomo
No full textIntroduzione al tema della metamorfosi animalesca (e del rapporto animale/ uomo) nel mondo antico, con particolare riferimento a brani tratti da Odissea, Sofocle, Aristofane, Lucrezio, Virgilio, Ovidio, Seneca; la metamorfosi, dall'episodio odissiaco di Circe all'Aracne ovidiana, è metafora della natura fondamentalmente animale dell'essere umano (disvelata in passi chiave come il V libro di Lucrezio o la descrizione dell'eros degli animali - fra cui è l'uomo ad avere la peggio - in Virgilio georgico); una minaccia alla concezione fondamentalmente antropocentrica del mondo antico
Le torsioni dello sguardo interiore
No full textPresentazione, testo e traduzione di Aug. Conf. 8,7,16; 7,18. Nel descrivere il difficile processo della sua conversione, Agostino sfrutta quello che Alfonso Traina ha definito linguaggio dell'interiorità, facendogli raggiungere, per via di metafora e di un uso straniato della sintassi, livelli ignoti persino al modello senecan
Identikit del congiurato
No full textIntroduzione, testo e traduzione di un passo della II Catilinaria di Cicerone (2,17-25
- …
