Universal dimer-dimer scattering in lattice effective field theory
Yükleniyor...
Tarih
2017
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science BV
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
We consider two-component fermions with short-range interactions and large scattering length. This system has universal properties that are realized in several different fields of physics. In the limit of large fermion-fermion scattering length a(ff) and zero-range interaction, all properties of the system scale proportionally with a(ff). For the case with shallow bound dimers, we calculate the dimer-dimer scattering phase shifts using lattice effective field theory. We extract the universal dimer-dimer scattering length a(dd)/a(ff) = 0.618(30) and effective range r(dd)/a(ff) = -0.431(48). This result for the effective range is the first calculation with quantified and controlled systematic errors. We also benchmark our methods by computing the fermion-dimer scattering parameters and testing some predictions of conformal scaling of irrelevant operators near the unitarity limit. (C) 2017 The Authors. Published by Elsevier B.V.
Açıklama
WOS:000400677700046
Anahtar Kelimeler
Kaynak
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
768
Sayı
Künye
Elhatisari, S., Katterjohn, K., Lee, D., Meißner, U. G., Rupak, G. (2016). Universal dimer-dimer scattering in lattice effective field theory. Physics Letters B, 768, 337-344.
