Gauge invariant finite size spectrum of the giant magnon

  title={Gauge invariant finite size spectrum of the giant magnon},
  author={Davide Astolfi and Valentina Forini and Gianluca Grignani},
It is shown that the finite size corrections to the spectrum of the giant magnon solution of classical string theory, computed using the uniform light-cone gauge, are gauge invariant and have physical meaning. This is seen in two ways: from a general argument where the single magnon is made gauge invariant by putting it on an orbifold as a wrapped state obeying the level matching condition as well as all other constraints, and by an explicit calculation where it is shown that physical quantum… CONTINUE READING
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