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Physique Théorique
(133) Production(s) de l'année 2016
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The multipolar hamiltonian to model quantum metamaterialsin the visible range
Auteur(s): Rousseau E., Felbacq D.
Conférence invité: Quantum Metamaterials and Quantum Technology 2016 workshop (Spetses, GR, 2016-06-19)
Texte intégral en Openaccess :
Ref HAL: hal-01337693_v1
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Résumé: This presentation adresses the question of the correct hamiltonian to describe a quantum metamaterials in the optical frequency range.
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Enhancing carbon-nanotubes luminescence with the help of resonant hotspots
Auteur(s): Rousseau E., Beaufils C., Cassabois G.
Conférence invité: Advances in Photonics and Applications (Florence, IT, 2016-06-09)
Texte intégral en Openaccess :
Ref HAL: hal-01333418_v1
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Résumé: In this talk we will present experimental results demonstrating enhancement of the luminescence of single carbon nanotubes with the help of a random surface of resonant metallic scatterers.
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Quantum metamaterials in the microwave and optical ranges
Auteur(s): Zagoskin A. m., Felbacq D., Rousseau E.
(Article) Publié:
Epj Quantum Technology, vol. 3 p.2 (2016)
Texte intégral en Openaccess :
Ref HAL: hal-01333403_v1
Ref Arxiv: 1601.06587
DOI: 10.1140/epjqt/s40507-016-0040-x
WoS: 000407193100001
Ref. & Cit.: NASA ADS
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22 Citations
Résumé: Quantum metamaterials generalize the concept of metamaterials (artificial optical media) to the case when their optical properties are determined by the interplay of quantum effects in the constituent 'artificial atoms' with the electromagnetic field modes in the system. The theoretical investigation of these structures demonstrated that a number of new effects (such as quantum birefringence, strongly nonclassical states of light, etc) are to be expected, prompting the efforts on their fabrication and experimental investigation. Here we provide a summary of the principal features of quantum metamaterials and review the current state of research in this quickly developing field, which bridges quantum optics, quantum condensed matter theory and quantum information processing.
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Equilibrium sampling of hard spheres up to the jamming density and beyond
Auteur(s): Berthier L., Coslovich D., Ninarello A. S., Ozawa M.
(Article) Publié:
Physical Review Letters, vol. 116 p.238002 (2016)
Texte intégral en Openaccess :
Ref HAL: hal-01331594_v1
Ref Arxiv: 1511.06182
DOI: 10.1103/PhysRevLett.116.238002
WoS: 000377509900014
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
76 Citations
Résumé: We implement and optimize a particle-swap Monte-Carlo algorithm that allows us to thermalize a polydisperse system of hard spheres up to unprecedentedly-large volume fractions, where \revise{previous} algorithms and experiments fail to equilibrate. We show that no glass singularity intervenes before the jamming density, which we independently determine through two distinct non-equilibrium protocols. We demonstrate that equilibrium fluid and non-equilibrium jammed states can have the same density, showing that the jamming transition cannot be the end-point of the fluid branch.
Commentaires: 5 pages, 3 figs; To be published in Phys. Rev. Lett. Réf Journal: Phys. Rev. Lett. 116, 238002 (2016)
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D-instantons, mock modular forms and BPS partition functions
Auteur(s): Alexandrov S.
Conférence invité: Number Theory and Physics (Paris, FR, 2016-05-23)
Ref HAL: hal-01330956_v1
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Résumé: I'll discuss the modular properties of D3-brane instantons appearing in Calabi-Yau string compactifications. I'll show that the D3-instanton contribution to a certain geometric potential on the hypermultiplet moduli space can be related to the elliptic genus of (0,4) SCFT. The modular properties of the potential imply that the elliptic genus associated with non-primitive divisors of Calabi-Yau is only mock modular. I'll show how to construct its modular completion and prove the modular invariance of the twistorial construction of D-instanton corrected hypermultiplet moduli space.
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Theory of morphological transformation of viral capsid shell during the maturation process in the HK97 bacteriophage and similar viruses.
Auteur(s): Konevtsova O., Lorman V., Rochal S.B.
(Article) Publié:
Physical Review E: Statistical, Nonlinear, And Soft Matter Physics, vol. 93 p.052412 (2016)
Texte intégral en Openaccess :
Ref HAL: hal-01319073_v1
PMID 27300929
DOI: 10.1103/PhysRevE.93.052412
WoS: 000376262700007
Exporter : BibTex | endNote
4 Citations
Résumé: We consider the symmetry and physical origin of collective displacement modes playing a crucial role in the morphological transformation during the maturation of the HK97 bacteriophage and similar viruses. It is shown that the experimentally observed hexamer deformation and pentamer twist in the HK97 procapsid correspond to the simplest irreducible shear strain mode of a spherical shell. We also show that the icosahedral faceting of the bacteriophage capsid shell is driven by the simplest irreducible radial displacement field. The shear field has the rotational icosahedral symmetry group I while the radial field has the full icosahedral symmetry I_{h}. This difference makes their actions independent. The radial field sign discriminates between the icosahedral and the dodecahedral shapes of the faceted capsid shell, thus making the approach relevant not only for the HK97-like viruses but also for the parvovirus family. In the frame of the Landau-Ginzburg formalism we propose a simple phenomenological model valid for the first reversible step of the HK97 maturation process. The calculated phase diagram illustrates the discontinuous character of the virus shape transformation. The characteristics of the virus shell faceting and expansion obtained in the in vitro and in vivo experiments are related to the decrease in the capsid shell thickness and to the increase of the internal capsid pressure.
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Realistic tunnelling states for the magnetic effects in non-metallic real glasses
Auteur(s): Jug Giancarlo, Bonfanti S., Kob W.
(Article) Publié:
Philosophical Magazine, vol. 96 p.648-703 (2016)
Texte intégral en Openaccess :
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