@techreport{oai:nifs-repository.repo.nii.ac.jp:00010297,
 author = {"Tanaka,  M. and Grosberg,  A. Yu and Tanaka,  T."},
 month = {Jan},
 note = {"The effects of periodic boundary conditions are examined for multichain Coulomb polymers that are composed of both positively and negatively-charged monomers (polyampholyte). At high temperature, polyampholyte takes a large volume with its chains spreading homogeneously in the whole domain. At low temperature where the Coulomb energy prevails over the thermal energy, the polyampholyte is collapsed to form a globule. The resultant globule is somewhat more compressed than that in an isolated (wall-bound) system. The effect of added salt is also mentioned briefly."},
 title = {Comparison of Multichain Coulomb Polymers in Isolated and Periodic Systems: Molecular Dynamics Study},
 year = {1999}
}