Multichannel scattering and Feshbach resonances: Effective theory, phenomenology, and many-body effects
نویسندگان
چکیده
منابع مشابه
Many-body Scattering Theory of Electronic Systems
This work reviews recent advances in the analytical treatment of the continuum spectrum of correlated few-body non-relativistic Coulomb systems. The exactly solvable two-body problem serves as an introduction to the non-separable three-particle system. For the latter case we discuss the existence of an approximate separability of the long and the short-range dynamics which is exposed in an appr...
متن کاملFano-Feshbach resonances in two-channel scattering around exceptional points
It is well known that in open quantum systems resonances can coalesce at an exceptional point, where both the energies and the wave functions coincide. In contrast to the usual behaviour of the scattering amplitude at one resonance, the coalescence of two resonances invokes a pole of second order in the Green’s function, in addition to the usual first order pole. We show that the interference d...
متن کاملOptical Feshbach resonances: Field-dressed theory and comparison with experiments
Optical Feshbach resonances (OFRs) have generated significant experimental interest in recent years. These resonances are promising for many-body physics experiments, yet the practical application of OFRs has been limited. The theory of OFRs has been based on an approximate model that fails in important detuning regimes, and the incomplete theoretical understanding of this effect has hindered O...
متن کاملEffective Field Theory and the Nuclear Many Body Problem
We review many body calculations of the equation of state of dilute neutron matter in the context of effective field theories of the nucleon-nucleon interaction. PACS. 21.65.+f Nuclear Matter – 24.85.+p QCD in Nuclei
متن کاملThree-Body Interactions in Many-Body Effective Field Theory
A general principle of any effective low-energy theory is that if a system is probed or interacts at low energies, resolution is also low, and fine details of what happens at short distances or in high-energy intermediate states are not resolved [ 1]. In this case, it is easier and more efficient to use low-energy degrees of freedom for low-energy processes. The short-distance structure can be ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2005
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.71.052713