Abstract

Abstract In this chapter we discuss two explicit examples of conformal field theories. We start our analysis with the free massless bosonic theory that we have already seen in the previous chapter. After, we discuss the conformal field theory of a complex fermion operator (a Dirac fermion) using its decomposition in the real Majorana components. The central charge of both bosonic and fermion theories is c = 1 and this suggests the existence of an equivalence between them. The transformation that maps a bosonic into a fermion theory and vice versa is known as bosonization: it provides a useful tool both for the comprehension of the conformal theories and for a wide range of applications, in particular in low-dimensional condensed matter systems.

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