Details

Autor(en) / Beteiligte

• Stetcu, I.
• Rotureau, J.
• Barrett, B.R.
• van Kolck, U.

Titel

An effective field theory approach to two trapped particles

Ist Teil von

• Annals of physics, 2010-08, Vol.325 (8), p.1644-1666

Ort / Verlag

New York: Elsevier Inc

Erscheinungsjahr

2010

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We discuss the problem of two particles interacting via short-range interactions within a harmonic-oscillator trap. The interactions are organized according to their number of derivatives and defined in truncated model spaces made from a bound-state basis. Leading-order (LO) interactions are iterated to all orders, while corrections are treated in perturbation theory. We show explicitly that next-to-LO and next-to-next-to-LO interactions improve convergence as the model space increases. In the large-model-space limit we regain results from a pseudopotential. Arbitrary scattering lengths are considered, as well as a generalization to include the non-vanishing range of the interaction.