Do single photons tunnel faster than light?

Details Do single photons tunnel faster than light? Do single photons tunnel faster than light?

2007-08-29

arxiv.org/abs/0708.3889v1

Physics

Quantum Physics

Invited Paper presented at the SPIE Conference "The Nature of Light: What are Photons?", San Diego, CA, August 26, 2007

Scientific paper

Experiments done in the early 1990's produced a surprising result: that single photons pass through a photonic tunnel barrier with a group velocity faster than the vacuum speed of light. Subsequent experiments with classical pulses have also revealed apparent superluminal group velocities as well as tunneling times that saturate with barrier length, a phenomenon known as the Hartman effect. In this paper we show that the measured delays are in fact cavity lifetimes as opposed to transit times. This interpretation resolves the Hartman paradox and shows that tunneling is not superluminal as widely believed.

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