title: Boolean chaos.
abstract: We observe deterministic chaos in a simple network of electronic logic gates that are not regulated by a clocking signal. The resulting power spectrum is ultrawide band, extending from dc to beyond 2 GHz. The observed behavior is reproduced qualitatively using an autonomously updating Boolean model with signal propagation times that depend on the recent history of the gates and filtering of pulses of short duration, whose presence is confirmed experimentally. Electronic Boolean chaos may find application as an ultrawide-band source of radio waves.
authors.affiliation: Department of Physics and Center for Nonlinear and Complex Systems, Duke University, Durham, North Carolina 27708, USA. rz10@phy.duke.edu
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Hugo L D
authors.initials: HL
authors.lastname: de S Cavalcante
authors.forename: Zheng
authors.initials: Z
authors.lastname: Gao
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Gauthier
authors.forename: Joshua E S
authors.initials: JE
authors.lastname: Socolar
authors.forename: Matthew M
authors.initials: MM
authors.lastname: Adams
authors.forename: Daniel P
authors.initials: DP
authors.lastname: Lathrop
mesh_terms: D003198:Computer Simulation; D016015:Logistic Models; D017711:Nonlinear Dynamics; D012815:Signal Processing, Computer-Assisted