7,537 research outputs found
Dynamical Casimir effect with Robin boundary conditions in a three dimensional open cavity
We consider a massless scalar field in 1+1 dimensions inside a cavity
composed by a fixed plate, which imposes on the field a Robin BC, and an
oscillating one, which imposes on the field a Dirichlet BC. Assuming that the
plate moves for a finite time interval, and considering parametric resonance,
we compute the total number of created particles inside the cavity. We
generalize our results to the case of two parallel plates in 3+1 dimensions.Comment: This work was presented in the Conference QFEXT09, held at the
University of Oklahoma, Norman, OK, USA, September 21-25, 2009, and will
appear in the proceedings of this conference. It contains 4 figure
Estimation of Muscle Fiber Conduction Velocity from Surface EMG Recordings by Optimal Spatial Filtering
Identification of Non-Propagating Components in Surface EMG Recordings by Optimal Spatial Filtering
Estimative for the size of the compactification radius of a one extra dimension Universe
In this work, we use the Casimir effect to probe the existence of one extra
dimension. We begin by evaluating the Casimir pressure between two plates in a
manifold, and then use an appropriate statistical analysis in
order to compare the theoretical expression with a recent experimental data and
set bounds for the compactification radius
The Zeta Function Method and the Harmonic Oscillator Propagator
We show how the pre-exponential factor of the Feynman propagator for the
harmonic oscillator can be computed by the generalized -function method.
Besides, we establish a direct equivalence between this method and Schwinger's
propertime method.Comment: 12 latex pages, no figure
Path Integral and the Induction Law
We show how the induction law is correctly used in the path integral
computation of the free particle propagator. The way this primary path integral
example is treated in most textbooks is a little bit missleading.Comment: 5 latex pages, no figure
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