585 research outputs found
Ocorrencia de albatrellus ovinus no Brasil
Albatrellus ovinus (Schaeff ex Fr.) Kotb. & Puz. es descrito por primera vez en Brasil, en suelos baj
Testing for Multipartite Quantum Nonlocality Using Functional Bell Inequalities
We show that arbitrary functions of continuous variables, e.g. position and
momentum, can be used to generate tests that distinguish quantum theory from
local hidden variable theories. By optimising these functions, we obtain more
robust violations of local causality than obtained previously. We analytically
calculate the optimal function and include the effect of nonideal detectors and
noise, revealing that optimized functional inequalities are resistant to
standard forms of decoherence. These inequalities could allow a loophole-free
Bell test with efficient homodyne detection
Associação de candida mogii com albatrellus ovinus
Por cinco años consecutivos fueron colectados especĂmenes de A. ovinus asociados a C. mogii
Interação enxerto e porta-enxerto na incidĂȘncia da resinose do cajueiro.
Este estudo objetivou avaliar o efeito de combinaçÔes de clones de cajueiro-anĂŁo-precoce usados como enxerto e porta-enxerto na incidĂȘncia da resinose
Fungos isolados do ar e do piso de ambientes fechados do Hospital escola da Universidade Federal de Pernambuco, Recife, Brasil â II leveduras
Del aire y del piso de ambientes cerrados del "Hospital das ClĂnicas da Universidade Federal de Pernambuco, Recife, Brasilâ; fueron aisladas 82 muestras de levaduras de los generos Brettanomyces, Candida, Rhodotorula y Trichosporon; su mavor incidencia fue detectada en el piso y durante el periodo lluvios
Hongos asociados a semillas de tomate (lycopersicon esculentum)
Semillas de tomate (lycopersicon esculentum) colectadas en Camocin de Sao Felix-PE, Nordeste de Brasil. fueron examinadas con el objetivo de verificar la poblaciĂłn fĂșngica. Las semillas fueron obtenidos de la Cooperativa local de agricultores (semillas tratadas), y directamente de tomates maduros (semillas no tratadas).Aspelgillus Penicillium y Chaetomium, fueron los gĂ©neros encontrados con mayor frecuencia, mientras los especies : Aspergillus restrictus, Penicillium steckii y Penicillium axalicum, las mĂĄs dominantes.Ramichloridium, subulatum. Pithomyces y thielavia minuta fueron aisladas por primera vez en semillas de tomates
Hongos filamentosos aislados desde el suelo y el agua en la playa de Boa Viagem (Recife, Brasil)
Se investigó la presencia de hongos filamentosos en el suelo y en las aguas de la playa de Boa Viagem, Recife, Pernambuco, Brasil. Se aisló un total de 10.894 colonias de hongos pertenecientes a 49 géneros y 115 especies, mayoritariamente Deuteromycetes. Los géneros Aspergillus y Penicillium fueron los dominantes en ambos sustratos
Fungos isolados do ar e do piso de ambientes fechados do Hospital escola da Universidade federal de Pernambuco, Recife, Brasil â I
Del aire y del piso de ambientes confinados del "Hospital das ClĂnicas da Universidade Federal de Pernambuco, Recife, Brasilâ; fueron aisladas 3.330 colonias de hongos correspondientes a 123 entidades taxonĂłmicas pertenecientes en su mayorla a los Asco-Deuteromycotina (95,3%), estando los demĂĄs grupos escasamente representados Zigomycotina (5,6%); Basidiomycotina (0,8%) y Micelia sterilia (0,2%). No hubo diferencias significativas entre la cantidad de colonias aisladas durante los periodos de pluviosidad y verano. ObservĂĄndose el mayor nĂșmero de colonias en el piso mĂĄs que en aquellas aisladas del aire atmosfĂ©rico. Los gĂ©neros encontrados con mayor frecuencia fueron Aspergillus, Penicillium y Fusarium. Entre los Hyphomycetes aislados, 14 especies son referidas como agentes etiolĂłgicos de micosis
Dynamics of multipartite quantum correlations under decoherence
Quantum discord is an optimal resource for the quantification of classical
and non-classical correlations as compared to other related measures. Geometric
measure of quantum discord is another measure of quantum correlations.
Recently, the geometric quantum discord for multipartite states has been
introduced by Jianwei Xu [arxiv:quant/ph.1205.0330]. Motivated from the recent
study [Ann. Phys. 327 (2012) 851] for the bipartite systems, I have
investigated global quantum discord (QD) and geometric quantum discord (GQD)
under the influence of external environments for different multipartite states.
Werner-GHZ type three-qubit and six-qubit states are considered in inertial and
non-inertial settings. The dynamics of QD and GQD is investigated under
amplitude damping, phase damping, depolarizing and flipping channels. It is
seen that the quantum discord vanishes for p>0.75 in case of three-qubit GHZ
states and for p>0.5 for six qubit GHZ states. This implies that multipartite
states are more fragile to decoherence for higher values of N. Surprisingly, a
rapid sudden death of discord occurs in case of phase flip channel. However,
for bit flip channel, no sudden death happens for the six-qubit states. On the
other hand, depolarizing channel heavily influences the QD and GQD as compared
to the amplitude damping channel. It means that the depolarizing channel has
the most destructive influence on the discords for multipartite states. From
the perspective of accelerated observers, it is seen that effect of environment
on QD and GQD is much stronger than that of the acceleration of non-inertial
frames. The degradation of QD and GQD happens due to Unruh effect. Furthermore,
QD exhibits more robustness than GQD when the multipartite systems are exposed
to environment.Comment: 15 pages, 4 figures, 4 table
Entanglement and nonlocality in multi-particle systems
Entanglement, the Einstein-Podolsky-Rosen (EPR) paradox and Bell's failure of
local-hidden-variable (LHV) theories are three historically famous forms of
"quantum nonlocality". We give experimental criteria for these three forms of
nonlocality in multi-particle systems, with the aim of better understanding the
transition from microscopic to macroscopic nonlocality. We examine the
nonlocality of N separated spin J systems. First, we obtain multipartite Bell
inequalities that address the correlation between spin values measured at each
site, and then we review spin squeezing inequalities that address the degree of
reduction in the variance of collective spins. The latter have been
particularly useful as a tool for investigating entanglement in Bose-Einstein
condensates (BEC). We present solutions for two topical quantum states:
multi-qubit Greenberger-Horne-Zeilinger (GHZ) states, and the ground state of a
two-well BEC
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