4,533 research outputs found
The analysis of Polyakov loop and spin correlators in finite volumes
We derive an analytic expression for point to point correlation functions of
the Polyakov loop based on the transfer matrix formalism. The contributions
from the eigenvalues of the transfer matrix including and beyond the mass gap
are investigated both for the Ising model and in finite temperature
gauge theory. We find that the leading matrix element shows similar
scaling properties in both models. Just above the critical point we obtain for
a Debye screening mass , independent of the volume.
Sorry, figures are not included and can be sent by ordinary mail.Comment: TALK GIVEN AT THE LATTICE '93 INTERNATIONAL SYMPOSIUM LATTICE FIELD
THEORY, DALLAS, USA, OCTOBER 12--16, 1993 3 pages preprint HU
BERLIN--IEP--93/5 and BIELEFELD BI-TP--93/63, November 199
Reflections on a vision for school leadership
When I reflect upon my vision for leading a school, I see a holistic nature to the areas of climate, shared decision making, community collaboration, and educational programming. These areas overlap one another as they provide the foundation on which I will lead. Community collaboration involves shared decision making, and shared decision making impacts climate. Educational programming, as I have described it, involves all of these areas. I feel what connects everything are the principles of relationships, resources, and relevancy. I believe the keys to success as a leader will be dependent upon the ability to create and nurture relationships, identify and utilize resources, and establish and maintain relevancy in what we do as a school
Interference in interacting quantum dots with spin
We study spectral and transport properties of interacting quantum dots with
spin. Two particular model systems are investigated: Lateral multilevel and two
parallel quantum dots. In both cases different paths through the system can
give rise to interference. We demonstrate that this strengthens the multilevel
Kondo effect for which a simple two-stage mechanism is proposed. In parallel
dots we show under which conditions the peak of an interference-induced orbital
Kondo effect can be split.Comment: 8 pages, 8 figure
Properties of the non-Gaussian fixed point in 4D compact U(1) lattice gauge theory
We examine selected properties of the gauge-ball spectrum and fermionic
variables in the vicinity of the recently discussed non-Gaussian fixed point of
4D compact U(1) lattice gauge theory within the quenched approximation.
Approaching the critical point from within the confinement phase, our data
support scaling of gauge-ball states in units of the string tension
square root. The analysis of the chiral condensate within the framework of a
scaling form for the equation of state suggests non mean-field values for the
magnetic exponents and .Comment: 73K postscript fil
Evidence for a Critical Behavior in Pure Compact QED
We present evidence about a critical behavior of compact QED (CQED) pure
gauge theory. Regularizing the theory on lattices homotopic to a sphere, we
present evidence for a critical, i.e. second order like behavior at the
deconfinement phase transition for certain values of the coupling parameter
.Comment: 3 pages, 3 figures, POSTSCRIPT file (127KB uuencoded
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