Observation of slowly decaying eigenmodes without exceptional points in Floquet dissipative synthetic circuits

• DOI: 10.1038/s42005-018-0087-3
• Publication Date: 2018-11-23T12:29:42Z
• Authors: Roberto de J. Leó...; Mario A. Quiroz-J...; Jorge L. Domíngue...; Rafael Quintero-T...; José L. Aragón; Andrew K. Harter; Yogesh N. Joglekar
• Keywords: Floquet theory

Abstrct Passive parity-time symmetry breaking transitions, where long-lived eigenmodes emerge in a locally dissipative system, have been extensively studied recent years. Conventional wisdom says that they occur at exceptional points. Here we report the observation of multiple transitions showing emergence slowly decaying dissipative, Floquet electronic system with synthetic components. Remarkably, our modes without Our setup uses an electrical oscillator inductively coupled to oscillator, time-periodic inductive coupling and resistive-heating losses are independently controlled. With dissipation, slowly-decaying vanishingly small dissipation strength weak limit. moderate coupling, instances their disappearance observed. asymmetric dimer model, show these driven by avoided-level-crossing purely systems, generically present static domains.