APPARATUS AND METHODS FOR LOCKED QUANTUM COMMUNICATIONUSING PHOTONIC INTEGRATED CIRCUITS
First Claim
1. An apparatus for quantum communication, the apparatus comprising:
- a light source to provide an input signal having a plurality of distinct spectral components, each photon in the input signal representing at least one photonic qubit encoded in a time domain basis;
an input waveguide, optically coupled to the light source, to guide the input signal; and
a plurality of ring resonators, optically coupled to the input waveguide, to receive the input signal via the input waveguide, each ring resonator in the plurality of ring resonators having a resonant wavelength matching a wavelength of a corresponding distinct spectral component in the plurality of distinct spectral components, such that the plurality of ring resonators delays each distinct spectral component in the plurality of distinct spectral components by a distinct time delay.
1 Assignment
0 Petitions
Accused Products
Abstract
A large-scale tunable-coupling ring array includes an input waveguide coupled to multiple ring resonators, each of which has a distinct resonant wavelength. The collective effect of these multiple ring resonators is to impart a distinct time delay to a distinct wavelength component (or frequency component) in an input signal, thereby carrying out quantum scrambling of the input signal. The scrambled signal is received by a receiver also using a large-scale tunable-coupling ring array. This receiver-end ring resonator array recovers the input signal by imparting a compensatory time delay to each wavelength component. Each ring resonator can be coupled to the input waveguide via a corresponding Mach Zehnder interferometer (MZI). The MZI includes a phase shifter on at least one of its arms to increase the tunability of the ring array.
-
Citations
23 Claims
-
1. An apparatus for quantum communication, the apparatus comprising:
-
a light source to provide an input signal having a plurality of distinct spectral components, each photon in the input signal representing at least one photonic qubit encoded in a time domain basis; an input waveguide, optically coupled to the light source, to guide the input signal; and a plurality of ring resonators, optically coupled to the input waveguide, to receive the input signal via the input waveguide, each ring resonator in the plurality of ring resonators having a resonant wavelength matching a wavelength of a corresponding distinct spectral component in the plurality of distinct spectral components, such that the plurality of ring resonators delays each distinct spectral component in the plurality of distinct spectral components by a distinct time delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A system for quantum communication, the system comprising:
-
a transmitter comprising; an input waveguide to guide an input signal having a plurality of spectral components, an ith spectral component in the plurality of spectral components having an input wavelength λ
i, where i=1, 2, . . . , N and N is a positive integer; anda first plurality of ring resonators, optically coupled to the input waveguide, to generate a scrambled optical signal from the input signal, an ith ring resonator in the first plurality of ring resonators having a resonant wavelength λ
i such that the first plurality of ring resonators imparts a time delay τ
i to the ith spectral component in the input signal so as to generate the scrambled optical signal;a receiver, in optical communication with the transmitter, to receive the scrambled optical signal, the receiver comprising a second plurality of ring resonators to impart a time delay −
τ
i to the ith spectral component in the scrambled optical signal so as to recover the input signal. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
-
18. A method of quantum enigma, the method comprising:
transmitting an input signal through a first plurality of ring resonators to generate a scrambled optical signal, the input signal having a plurality of spectral components, an ith spectral component having an input wavelength λ
i, where i=1, 2, . . . , N and N is a positive integer, an ith ring resonator in the first plurality of ring resonators having a resonant wavelength at λ
i such that the first plurality of ring resonators imparts a time delay τ
i to the ith spectral component in the input signal.- View Dependent Claims (19, 20, 21, 22, 23)
Specification