Supersymmetric transformations for coupled channels with threshold differences
نویسندگان
چکیده
منابع مشابه
Supersymmetric transformations for coupled channels with threshold differences
The asymptotic behaviour of the superpotential of general SUSY transformations for a coupled channel Hamiltonian with different thresholds is analyzed. It is shown that asymptotically the superpotential can tend to a diagonal matrix with an arbitrary number of positive and negative entries depending on the choice of the factorization solution. The transformation of the Jost matrix is generalize...
متن کاملSpatially-Coupled Codes and Threshold Saturation on Intersymbol-Interference Channels
Recently, it has been observed that terminated low-density-parity-check (LDPC) convolutional codes (or spatially-coupled codes) appear to approach capacity universally across the class of binary memoryless channels. This is facilitated by the “threshold saturation” effect whereby the belief-propagation (BP) threshold of the spatially-coupled ensemble is boosted to the maximum a-posteriori (MAP)...
متن کاملApproximations for strongly-coupled supersymmetric quantum mechanics
We advocate a set of approximations for studying the finite temperature behavior of strongly-coupled theories in 0+1 dimensions. The approximation consists of expanding about a Gaussian action, with the width of the Gaussian determined by a set of gap equations. The approximation can be applied to supersymmetric systems, provided that the gap equations are formulated in superspace. It can be ap...
متن کاملConditionally exactly solvable potentials and supersymmetric transformations
A general procedure is presented to construct conditionally exactly solvable (CES) potentials using the techniques of supersymmetric quantum mechanics. The method is illustrated with potentials related to the harmonic oscillator problem. Besides recovering known results, new CES potentials are also obtained within the framework of this general approach. The conditions under which this method le...
متن کاملSuperconformal transformations of the N = 4 supersymmetric
The N = 4 supersymmetric Yang-Mills theory (SSYM) has many interesting properties, one of them being its finiteness to all orders in perturbation (Mandelstam 1983; Howe et a11983; Brink et al 1983; Salam et a11983). One of the ways to prove finiteness (Sohnius and West 1981), relies on the fact that the N = 4 superconformal (SC) algebra does not involve the chiral-R charge. In this paper we obt...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics A: Mathematical and Theoretical
سال: 2007
ISSN: 1751-8113,1751-8121
DOI: 10.1088/1751-8113/40/15/013