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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 2001),
  • paper QMC4

Quantum limits to superluminal pulse advancement

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Using intense electromagnetic fields, it is now possible to tailor the absorption, amplification, and dispersion properties of multi-level atoms.1 Dramatic examples include the reduction of the group velocity of a pulse of light to 17 m/s,2 and increasing the group velocity to values greater than c or even to negative values.3 The interpretation of a negative group velocity is that the peak of the pulse leaves the medium before it enters.

© 2001 Optical Society of America

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