Abstract
We prove that for dimensions d = 1, 2 the polaron (with general dispersion relation and couplings) has a unique ground state for any value of the total momentum (particle+ Bose field). For d ≥ 3 and for sufficiently small total momentum we show the existence of a unique ground state, extending however the domain of uniqueness known previously.
| Original language | English |
|---|---|
| Pages (from-to) | 1199-1211 |
| Number of pages | 13 |
| Journal | Journal of Physics A: Mathematical and General |
| Volume | 21 |
| Issue number | 5 |
| DOIs | |
| State | Published - 7 Mar 1988 |
| Externally published | Yes |