1,261 research outputs found
Dyson-Schwinger Equations with a Parameterized Metric
We construct and solve the Dyson-Schwinger equation (DSE) of quark propagator
with a parameterized metric, which connects the Euclidean metric with the
Minkowskian one. We show, in some models, the Minkowskian vacuum is different
from the Euclidean vacuum. The usual analytic continuation of Green function
does not make sense in these cases. While with the algorithm we proposed and
the quark-gluon vertex ansatz which preserves the Ward-Takahashi identity, the
vacuum keeps being unchanged in the evolution of the metric. In this case,
analytic continuation becomes meaningful and can be fully carried out.Comment: 10 pages, 7 figures. To appear in Physical Review
Generic Structure of Research Article Abstracts
As an academic genre, the research article (RA) abstracts play an important role in academic community. This paper aims to explore the differences between RA abstracts by native and non-native speakers of English in terms of the generic structure. Theoretically, the commonly accepted IMRD model (Introduction-Method-Results-Discussion) and Swale’s Move-Step model are adopted to analyse the macro- and micro-structure respectively. It is found that the Introduction Move is obligatory for English RA abstracts by non-native speakers as opposed to the Introduction and the Results move by native speakers. Key words: Research Article; ; GeGenre Analysisneric Structur
Phase diagram and critical endpoint for strongly-interacting quarks
We introduce a method based on the chiral susceptibility, which enables one
to draw a phase diagram in the chemical-potential/temperature plane for
strongly-interacting quarks whose interactions are described by any reasonable
gap equation, even if the diagrammatic content of the quark-gluon vertex is
unknown. We locate a critical endpoint (CEP) at (\mu^E,T^E) ~ (1.0,0.9)T_c,
where T_c is the critical temperature for chiral symmetry restoration at \mu=0;
and find that a domain of phase coexistence opens at the CEP whose area
increases as a confinement length-scale grows.Comment: 4 pages, 3 figure
Determining hulls of generalized Reed-Solomon codes from algebraic geometry codes
In this paper, we provide conditions that hulls of generalized Reed-Solomon
(GRS) codes are also GRS codes from algebraic geometry codes. If the conditions
are not satisfied, we provide a method of linear algebra to find the bases of
hulls of GRS codes and give formulas to compute their dimensions. Besides, we
explain that the conditions are too good to be improved by some examples.
Moreover, we show self-orthogonal and self-dual GRS codes
- …