Abstract
The low energy fixed point structure of an -flavor two level system (TLS) model is studied where the conduction electron spin is replaced by the flavor quantum number . Using the multiplicative renormalization group we construct the order scaling equations and analyze their fixed point structure. The fixed point structure of this Hamiltonian is equivalent to that of the -channel Kondo model and the exponent of the leading irrelevant operators is also the same. However, for a TLS an infinite number of leading irrelevant operators appear that give a contribution to the different physical quantities but do not change their critical exponents.
- Received 5 July 1995
DOI:https://doi.org/10.1103/PhysRevLett.76.2133
©1996 American Physical Society