Improving the Vakulenko-Kapitanskii type inequality for Hopfions

نویسندگان

  • Minoru Hirayama
  • Jun Yamashita
چکیده

The Vakulenko-Kapitanskii type inequality between the energy of the Faddeev-Skyrme O(3) non-linear sigma model and the Hopf index is discussed. It is shown that the configurations obtained by Aratyn, Ferreira and Zimerman yield an inequality better than that conjectured by Ward.

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تاریخ انتشار 2001