Apparatus and method for a symmetric sequential entangler of periodic photons in a single input and output mode

摘要

An apparatus providing an integrated waveguide device that creates entanglement between a symmetrical sequence of periodically spaced (in time) photons in a single input and output mode. The invention comprises a polarization maintaining integrated waveguide chip containing a number of delay lines, integrated multimode interferometers with the potential for rapid switching, a polarization controller and off chip computer logic and timing.

主权项

1. An apparatus for sequentially entangling photons, comprising:
a waveguide chip having integrated optical components and interconnecting optical waveguide disposed therein, wherein said optical components further comprise an input port connected to said optical waveguide for inputting said photons into said waveguide chip; a polarization controller connected to said input port for rotating the polarization of photons received via said input port; a plurality of loop back paths having matched delay lines disposed in each for synchronizing said photons in time; a plurality of multimode interferometers for selectably routing said photons through any of said interconnecting optical waveguide; a controller for switching the input mode of any of said plurality of multimode interferometers so as to route said photons out of a selected interferometer output port; a clock source for synchronizing said controller with the arrival of said photons; an entangling gate having bypass and entangling inputs and bypass and entangling outputs for selectively entangling said photons; and an output port for routing said entangled photons out of said waveguide chip.