In theoretical physics, a minimal model is a two-dimensional conformal field theory whose spectrum is built from finitely many irreducible representations of the Virasoro algebra. Minimal models are parameterized by two integers p,q. A minimal model is unitary if .
These conformal field theories have a finite set of conformal families which close under fusion. However, generally these will not be unitary. Unitarity imposes the further restriction that q and p are related by q=m and p=m+1.
for m = 2, 3, 4, .... and h is one of the values
for r = 1, 2, 3, ..., m−1 and s= 1, 2, 3, ..., r.
The first few minimal models correspond to central charges and dimensions:
- m = 3: c = 1/2, h = 0, 1/16, 1/2. These 3 representations are related to the Ising model at criticality. The three operators correspond to the identity, spin and energy density respectively.
- m = 4: c = 7/10. h = 0, 3/80, 1/10, 7/16, 3/5, 3/2. These 6 give the scaling fields of the tri critical Ising model.
- m = 5: c = 4/5. These give the 10 fields of the 3-state Potts model.
- m = 6: c = 6/7. These give the 15 fields of the tri critical 3-state Potts model.
- P. Di Francesco, P. Mathieu, and D. Sénéchal, Conformal Field Theory, Springer-Verlag, New York City, 1997. ISBN 0-387-94785-X.
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