Abstract
We show that in contrast to the classical case, there is no local Mattis transformation for many-spin quantum systems. However, it is possible to construct a class of local unitary transformations that provides an extension of the concept of gauge invariance to quantum disordered systems. Interesting differences are found between classical and quantum systems, even in the large-spin limit.
| Original language | English |
|---|---|
| Pages (from-to) | 11882-11884 |
| Number of pages | 3 |
| Journal | Physical Review B |
| Volume | 38 |
| Issue number | 16 |
| DOIs | |
| State | Published - 1988 |
| Externally published | Yes |