827 research outputs found
Subtle leakage of a Majorana mode into a quantum dot
We investigate quantum transport through a quantum dot connected to source
and drain leads and side-coupled to a topological superconducting nanowire
(Kitaev chain) sustaining Majorana end modes. Using a recursive Green's
function approach, we determine the local density of states (LDOS) of the
system and find that the end Majorana mode of the wire leaks into the dot thus
emerging as a unique dot level {\it pinned} to the Fermi energy
of the leads. Surprisingly, this resonance pinning, resembling in this sense a
"Kondo resonance", occurs even when the gate-controlled dot level
is far above or far below . The
calculated conductance of the dot exhibits an unambiguous signature for the
Majorana end mode of the wire: in essence, an off-resonance dot
[], which should have ,
shows instead a conductance over a wide range of , due to this
pinned dot mode. Interestingly, this pinning effect only occurs when the dot
level is coupled to a Majorana mode; ordinary fermionic modes (e.g., disorder)
in the wire simply split and broaden (if a continuum) the dot level. We discuss
experimental scenarios to probe Majorana modes in wires via these leaked/pinned
dot modes.Comment: 3 figures, 5 pages, published in Phys. Rev. B (Editors' suggestion
Custos de aplicação do inóculo de nematoide, em gelatina e em hidrogel, para o controle da vespa-da-madeira.
bitstream/item/119295/1/CT-341-Susete.pd
Primeiro registro de Seticornuta Morley (Hymenoptera, Ichneumonidae, Metopiinae) do Brasil e descrição de uma nova espécie.
A new species of Seticornuta from Brazil is described and illustrated, the frst record of this genus for the Brazilian fauna. This new species was found in a study that aimed to enhance knowledge of the Brazilian fauna of Metopiinae, analysing samples from the hydrographic basin of Rio Mogi Guaçu. A diagnosis, along with distribution information for Seticornuta species are provided
Criopreservação do nematóide Deladenus (Beddingia) siricidicola.
bitstream/item/25621/1/175-10.pd
Stream network analysis and geomorphic flood plain mapping from orbital and suborbital remote sensing imagery application to flood hazard studies in central Texas
The author has identified the following significant results. Development of a quantitative hydrogeomorphic approach to flood hazard evaluation was hindered by (1) problems of resolution and definition of the morphometric parameters which have hydrologic significance, and (2) mechanical difficulties in creating the necessary volume of data for meaningful analysis. Measures of network resolution such as drainage density and basin Shreve magnitude indicated that large scale topographic maps offered greater resolution than small scale suborbital imagery and orbital imagery. The disparity in network resolution capabilities between orbital and suborbital imagery formats depends on factors such as rock type, vegetation, and land use. The problem of morphometric data analysis was approached by developing a computer-assisted method for network analysis. The system allows rapid identification of network properties which can then be related to measures of flood response
Biologia de Cinara pinivora (Hemoptera: Aphididae), em duas temperaturas, em laboratório.
Organizado por Patrícia Póvoa de Mattos, Celso Garcia Auer, Paulo César Botosso e Rejane Stumpf Sberze
Primeiro registro de ataque de Sirex noctilio em Pinus taeda no Brasil.
bitstream/item/215497/1/circ-tec20.pd
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