Phase tristability in parametric threephoton downconversion
Abstract
This Letter shows that the parametric processes of spontaneous threephoton downconversion is accompanied by phase tristability of the subharmonic signal. The oscillations of the signal in a resonant cavity are modeled through an analytically solvable secondorder nonlinear oscillator. Selfsustained oscillations of the signal at a finite amplitude are found to be equally probable in three states with uniform phase contrasts. The onset of oscillations is a case of bifurcation from infinity. The stability of the ternary states is proven through an energy landscape function that identifies the attractor basins of the three states. An analogy is drawn between the oscillation threshold of a threephoton downconversion oscillator and a firstorder phase transition. The investigated phasetristable oscillator can serve as a classical ternary bit for unconventional computing applications.
 Publication:

Optics Letters
 Pub Date:
 October 2020
 DOI:
 10.1364/OL.402122
 Bibcode:
 2020OptL...45.5546M