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Conferences > QELS > 2001 > QMC > QMC5
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 2001),
  • paper QMC5

Signal velocity, causality, and quantum noise in superluminal light pulse propagation

A. Kuzmich, A. Dogariu, L.J. Wang, P. Milonni, and R. Y. Chiao

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Abstract

It is well known that the group velocity vg of a light pulse can exceed c in an anomalously dispersive medium. As discussed many years ago by Sommerfeld and Brillouin,1 a group velocity greater than c does not violate causality because it is not the velocity of information transmission.' They noted that the "frontal velocity," the velocity at which an infinitely sharp step-function-like disturbance of the light intensity propagates, can serve as a velocity of information transfer.

© 2001 Optical Society of America

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