8,225 research outputs found
Operator product expansions as a consequence of phase space properties
The paper presents a model-independent, nonperturbative proof of operator
product expansions in quantum field theory. As an input, a recently proposed
phase space condition is used that allows a precise description of point field
structures. Based on the product expansions, we also define and analyze normal
products (in the sense of Zimmermann).Comment: v3: minor wording changes, as to appear in J. Math. Phys.; 12 page
Statistical Modeling of Epistasis and Linkage Decay using Logic Regression
Logic regression has been recognized as a tool that can identify and model non-additive genetic interactions using Boolean logic groups. Logic regression, TASSEL-GLM and SAS-GLM were compared for analytical precision using a previously characterized model system to identify the best genetic model explaining epistatic interaction for vernalization-sensitivity in barley. A genetic model containing two molecular markers identified in vernalization response in barley was selected using logic regression while both TASSEL-GLM and SAS-GLM included spurious associations in their models. The results also suggest the logic regression can be used to identify dominant/recessive relationships between epistatic alleles through its use of conjugate operators
Influência do volume de calda e da combinação de produtos usados no tratamento da semente de soja sobre o seu desempenho fisiológico.
Detecting multi-atomic composite states in optical lattices
We propose and discuss methods for detecting quasi-molecular complexes which
are expected to form in strongly interacting optical lattice systems.
Particular emphasis is placed on the detection of composite fermions forming in
Bose-Fermi mixtures. We argue that, as an indirect indication of the composite
fermions and a generic consequence of strong interactions, periodic
correlations must appear in the atom shot noise of bosonic absorption images,
similar to the bosonic Mott insulator [S. F\"olling, et al., Nature {\bf 434},
481 (2005)]. The composites can also be detected directly and their
quasi-momentum distribution measured. This method -- an extension of the
technique of noise correlation interferometry [E. Altman et al., Phys. Rev. A
{\bf 79}, 013603 (2004)] -- relies on measuring higher order correlations
between the bosonic and fermionic shot noise in the absorption images. However,
it fails for complexes consisting of more than three atoms.Comment: 9 revtex page
- …