Entropic torque

@article{escidoc:1573453,
  title = {Entropic torque},
  journal = {Physical Review Letters},
  volume = {89},
  number = {8},
  pages = {088301},
  year = {2002},
  author = {Roth, R. and van Roij, R. and Andrienko, D. and Mecke, K. R. and Dietrich, S.},
  doi = {10.1103/PhysRevLett.89.088301}
}