Theory of a two-level system strongly interacting with a degenerate Fermi gas
- 27 January 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 56 (4) , 286-289
- https://doi.org/10.1103/physrevlett.56.286
Abstract
A two-level system is treated which interacts with a degenerate fermionic heat bath. Arbitrarily strong screening by fermions is taken into account. The hopping of the two-level system may be spontaneous or assisted by the fermionic bath. By derivation of scaling equations it is shown for the spin-(1/2) case that because of the assisted hops the two-level system cannot be localized in one of the states.Keywords
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