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Conference Paper

Faster-than-light propagations and their applications

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Ropers,  Claus       
Department of Ultrafast Dynamics, MPI for Biophysical Chemistry, Max Planck Society;

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Citation

Chiao, R. Y., Ropers, C., Solli, D., & Hickmann, J. M. (2003). Faster-than-light propagations and their applications. In N. P. Bigelow, J. H. Eberly, C. R. Stroud, & I. A. Walmsley (Eds.), Coherence and Quantum Optics VIII (pp. 109-123). Boston, MA: Springer US.


Cite as: https://hdl.handle.net/21.11116/0000-000B-6326-B
Abstract
Recent experiments have confirmed our predictions that the group velocity of light pulses propagating in transparent optical media can exceed c. In electronics, the causality principle does not forbid negative group delays of analytic signals in electronic circuits, in which the peak of an output pulse leaves the exit port of a circuit before the peak of the input pulse enters the input port. In condensed matter physics, negative transmission times of atoms are possible through superfluid helium slabs and through atomic BECs. Relativity is not violated by these phenomena.