TY - JOUR
T1 - Effective field theory for few-boson systems
AU - Bazak, Betzalel
AU - Eliyahu, Moti
AU - Van Kolck, Ubirajara
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016
Y1 - 2016
N2 - We study universal bosonic few-body systems within the framework of effective field theory at leading order (LO). We calculate binding energies of systems of up to six particles and the atom-dimer scattering length. Convergence to the limit of zero-range two- and three-body interactions is shown, indicating that no additional few-body interactions need to be introduced at LO. Generalizations of the Tjon line are constructed, showing correlations between few-body binding energies and the binding energy of the trimer, for a given dimer energy. As a specific example, we implement our theory for He4 atomic systems and show that the results are in surprisingly good agreement with those of sophisticated He4-He4 potentials. Potential implications for the convergence of the EFT expansion are discussed.
AB - We study universal bosonic few-body systems within the framework of effective field theory at leading order (LO). We calculate binding energies of systems of up to six particles and the atom-dimer scattering length. Convergence to the limit of zero-range two- and three-body interactions is shown, indicating that no additional few-body interactions need to be introduced at LO. Generalizations of the Tjon line are constructed, showing correlations between few-body binding energies and the binding energy of the trimer, for a given dimer energy. As a specific example, we implement our theory for He4 atomic systems and show that the results are in surprisingly good agreement with those of sophisticated He4-He4 potentials. Potential implications for the convergence of the EFT expansion are discussed.
UR - http://www.scopus.com/inward/record.url?scp=84994669348&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.94.052502
DO - 10.1103/PhysRevA.94.052502
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AN - SCOPUS:84994669348
SN - 2469-9926
VL - 94
JO - Physical Review A
JF - Physical Review A
IS - 5
M1 - 052502
ER -