685,737 research outputs found
c=5/2 Free Fermion Model of WB_{2} Algebra
We investigate the explicit construction of the algebra, which is
closed and associative for all values of the central charge , using the
Jacobi identity and show the agreement with the results studied previously.
Then we illustrate a realization of free fermion model, which
is limit of unitary minimal series, based on the cosets at level We confirm by explicit
computations that the bosonic currents in the algebra are indeed
given by the Casimir operators of .Comment: 16 page
Demonstration of Cascaded In-Line Single-Pump Fiber Optical Parametric Amplifiers in Recirculating Loop Transmission
The performance of cascaded single-pump fiber optical parametric amplifiers (FOPAs) is experimentally studied for the first time using recirculating loop transmission with 80-km dispersion managed spans. Error-free performance has been achieved over 320 km for 40-Gbit/s CSRZ-OOK and CSRZ-DPSK modulated signals
The Ising Model on a Quenched Ensemble of c = -5 Gravity Graphs
We study with Monte Carlo methods an ensemble of c=-5 gravity graphs,
generated by coupling a conformal field theory with central charge c=-5 to
two-dimensional quantum gravity. We measure the fractal properties of the
ensemble, such as the string susceptibility exponent gamma_s and the intrinsic
fractal dimensions d_H. We find gamma_s = -1.5(1) and d_H = 3.36(4), in
reasonable agreement with theoretical predictions. In addition, we study the
critical behavior of an Ising model on a quenched ensemble of the c=-5 graphs
and show that it agrees, within numerical accuracy, with theoretical
predictions for the critical behavior of an Ising model coupled dynamically to
two-dimensional quantum gravity, provided the total central charge of the
matter sector is c=-5. From this we conjecture that the critical behavior of
the Ising model is determined solely by the average fractal properties of the
graphs, the coupling to the geometry not playing an important role.Comment: 23 pages, Latex, 7 figure
Queen, James C. (5)
Fort McClellan, Alabama; 3rd Student Training Regiment, Fort Benning, GAhttps://dh.howard.edu/prom_corres/1119/thumbnail.jp
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