Bypassing the bandwidth theorem with PT symmetry

Authors

Hamidreza Ramezani, The University of Texas Rio Grande ValleyFollow
J. Schindler
F. M. Ellis
Uwe Günther
Tsampikos Kottos

Document Type

Article

Publication Date

6-28-2012

Abstract

The beat time τ fpt associated with the energy transfer between two coupled oscillators is dictated by the bandwidth theorem which sets a lower bound τ fpt∼1/δω. We show, both experimentally and theoretically, that two coupled active LRC electrical oscillators with parity-time (PT) symmetry bypass the lower bound imposed by the bandwidth theorem, reducing the beat time to zero while retaining a real valued spectrum and fixed eigenfrequency difference δω. Our results foster design strategies which lead to (stable) pseudounitary wave evolution, and may allow for ultrafast computation, telecommunication, and signal processing. © 2012 American Physical Society.

Comments

© Physical Review A - Atomic, Molecular, and Optical Physics. Original version available at: http://doi.org/10.1103/PhysRevA.85.062122

Recommended Citation

Ramezani, Hamidreza, J. Schindler, Fred M. Ellis, Uwe Günther, and Tsampikos Kottos. "Bypassing the bandwidth theorem with PT symmetry." Physical Review A 85, no. 6 (2012): 062122. http://doi.org/10.1103/PhysRevA.85.062122

Publication Title

Physical Review A - Atomic, Molecular, and Optical Physics

DOI

10.1103/PhysRevA.85.062122