Demonstration of negative group delays in a simple electronic circuit

Abstract

We present a simple electronic circuit which produces negative group delays for base-band pulses. When a band-limited pulse is applied as the input, a forwarded pulse appears at the output. The negative group delays in lumped systems share the same mechanism with the superluminal light propagation, which is recently demonstrated in an absorption-free, anomalous dispersive medium [Wang et al., Nature 406, 277 (2000)]. In this circuit, the advance time more than twenty percent of the pulse width can easily be achieved. The time constants, which can be in the order of seconds, is slow enough to be observed with the naked eye by looking at the lamps driven by the pulses.

6pages,8 figures

References in corpus (2)

• Transparent Anomalous Dispersion and Superluminal Light Pulse Propagation at a Negative Group Velocity
• Table-Top Time Reversal Violation

Cited by in corpus (5)

• Negative Group Delay and Superluminal Propagation: An Electronic Circuit Approach
• Signal prediction by anticipatory relaxation dynamics
• A negative group delay model for feedback-delayed manual tracking
• A universal negative group delay filter for the prediction of band-limited signals
• Simulation of Slow Light with Electronics Circuits