Two dimensional photonic cluster state generator from sequential photons with variable delay loopback

摘要

An integrated waveguide device that creates entanglement between a sequence of periodically spaced (in time) photons in a single input and output mode. The device consists of a polarization maintaining integrated waveguide chip containing a number of delay lines, integrated multimode interferometers with the potential for rapid switching, a polarization controller, an entangling gate, and off chip computer logic and timing. The device is capable of creating a diverse array of outputs such as linear cluster states and ring cluster states in a single output mode.

主权项

1. An apparatus for sequentially entangling photons in two dimensions, comprising:
a waveguide chip having integrated optical components and interconnecting optical waveguides disposed therein, wherein said optical components further comprise an input port connected to said optical waveguides for inputting said photons into said waveguide chip; a polarization controller connected to said input port for rotating the polarization of said input port; a plurality of delay lines for synchronizing said photons in time; a plurality of multimode interferometers for selectably routing said photons through any of said interconnecting optical waveguides; a plurality of controllers for switching an input mode of any of said plurality of multimode interferometers so as to route said photons into and out of a selected interferometer's input and output ports; 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; a variable optical delay loopback path; and an output port for routing said entangled photons out of said waveguide chip.