Inversionless amplification in a multilevel system. Academic Article uri icon


  • We prove that the amplification condition for a multifrequency field in an atomic system with multiple splitting of the operating levels implies a population inversion between the eigenstates of the density matrix. This explains the possibility of amplification without population inversion when a coherent superposition state of sublevels is prepared. 1993 The American Physical Society.

published proceedings

  • Phys Rev A

author list (cited authors)

  • Mandel, P., & Kocharovskaya, O.

citation count

  • 24

publication date

  • January 1993