Functional renormalization for trion formation in ultracold fermion gases

Details Functional renormalization for trion formation in ultracold fermion gases Functional renormalization for trion formation in ultracold fermion gases

2008-09-09

arxiv.org/abs/0809.1675v2

Phys. Rev. A 79, 013603 (2009)

Physics

Condensed Matter

Superconductivity

9 pages, 4 figures, minor changes, reference added

Scientific paper

10.1103/PhysRevA.79.013603

The energy spectrum for three species of identical fermionic atoms close to a Feshbach resonance is computed by use of a nonperturbative flow equation. Already a simple truncation shows that for large scattering length $|a|$ the lowest energy state is a "trion" (or trimer) bound state of three atoms. At the location of the resonance, for $|a|\to\infty$, we find an infinite set of trimer bound states, with exponentially decreasing binding energy. This feature was pointed out by Efimov. It arises from limit cycle scaling, which also leads to a periodic dependence of the three body scattering coupling on $\ln |a|$. Extending our findings by continuity to nonzero density and temperature we find that a "trion phase" separates a BEC and a BCS phase, with interesting quantum phase transitions for T=0.

Affiliated with

Also associated with

No associations

Rating

Functional renormalization for trion formation in ultracold fermion gases does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Functional renormalization for trion formation in ultracold fermion gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Functional renormalization for trion formation in ultracold fermion gases will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-160660