Extended two-channel kondo phase of a rotational quantum defect in a fermi gas

E. Fuh Chuo, K. Ballmann, L. Borda, J. Kroha

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1 Citation (Scopus)

Abstract

We show by numerical renormalization group calculations that a quantum defect with a two-dimensional rotational degree of freedom, immersed in a bath of fermionic particles with angular momentum scattering, exhibits an extended 2CK phase without fine-tuning of parameters. It is stabilized by a correlation effect which causes the states with angular momentum m=±1 to be the lowest energy states of the defect. This level crossing with the noninteracting m 0 ground state is signaled by a plateau in the temperature-dependent impurity entropy at S(T) kB ln 2, before the 2CK ground state value S(0) kB In is reached.

Original languageEnglish
Article number012007
JournalJournal of Physics: Conference Series
Volume568
DOIs
Publication statusPublished - 2014

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angular momentum
ground state
defects
gases
baths
plateaus
degrees of freedom
tuning
entropy
impurities
causes
scattering
temperature
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Extended two-channel kondo phase of a rotational quantum defect in a fermi gas. / Chuo, E. Fuh; Ballmann, K.; Borda, L.; Kroha, J.

In: Journal of Physics: Conference Series, Vol. 568, 012007, 2014.

Research output: Contribution to journalArticle

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