Abstract
We prove the equivalence, near the critical point, of a -dimensional spin system in a random external magnetic field with a ( )-dimensional spin system in the absence of a magnetic field. This is due to the hidden supersymmetry of the associated stochastic differential equation. We identify a space with one anticommuting coordinate with a space having negative dimensions -2.
- Received 26 June 1979
DOI:https://doi.org/10.1103/PhysRevLett.43.744
©1979 American Physical Society