Dahl, Jens Peder2; Mack, H.3; Wolf, A.3; Schleich, W. P.3
1 Department of Chemistry, Technical University of Denmark2 Department of Chemistry, Technical University of Denmark3 unknown
We show that s waves, that is wave functions that only depend on a hyperradius, are entangled if and only if the corresponding Wigner functions exhibit negative domains. We illustrate this feature using a special class of s waves which allows us to perform the calculations analytically. This class includes a Gaussian, a maximally entangled as well as a "shell" state.
Physical Review a (atomic, Molecular and Optical Physics), 2006, Vol 74, Issue 4