US 2025/0068026 A1Published application

Photonic Switch

AssigneePsiquantum, Corp.

InventorsHugo V. Cable, Damien Bonneau, Hsuan-Tung Peng, Bryan S. Park, Andrzej Perez Veitia, Sara Bartolucci, Eric Dudley, Chia-Ming Chang, Mihai Vidrighin

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Abstract

An example integrated generalized Mach-Zehnder Interferometer (GMZI) to process a quantum state of light is described. A quantum state of light comprising one or more photons can be received by a first coupler network in the GMZI. Using the first coupler network, the quantum state of light is distributed to one or more of a plurality of waveguide arms in the GMZI. The phase of the quantum state of light is adjusted using a plurality of phase shifters in the GMZI. The phase is adjusted for portions of the quantum state of light in one of the plurality of waveguide arms. The phase-adjusted quantum light is received by a second coupler network in the GMZI. Using the second coupler network, the quantum state of light is combined onto one or more outputs of the waveguide arms. The combined quantum light is outputted.

Claims20

Dependent claims

A method for processing light in an integrated generalized Mach-Zehnder Interferometer (GMZI), the method comprising:

receiving, by a first coupler network in the GMZI, a quantum state of light comprising one or more photons;
distributing, using the first coupler network, the quantum state of light to one or more of a plurality of waveguide arms in the GMZI;
adjusting, using a plurality of phase shifters in the GMZI, one or more phases of the quantum state of light distributed by the first coupler network, a phase shifter of the plurality of phase shifters adjusting a phase portion of the quantum state of light in one of the plurality of waveguide arms, each waveguide arm of the waveguide arms comprising a first phase shifter and a second phase shifter;
receiving, by a second coupler network in the GMZI, the quantum state of light having phases adjusted by the plurality of phase shifters;
combining, using the second coupler network, the quantum state of light to form combined quantum state of light onto one or more outputs of the waveguide arms;
and
outputting the combined quantum state of light from the one or more outputs of the waveguide arms.

4 more elements

A photonic integrated circuit comprising a quantum light switch, the quantum light switch comprising:

a first coupler network to receive a quantum state of light comprising one or more photons, the first couple network configured to distribute the quantum state of light to one or more of a plurality of arms of the quantum light switch;
a plurality of phase shifters on the plurality of arms of the quantum light switch, the plurality of phase shifters configured to couple the quantum state of light from the first coupler network, a phase shifter of the plurality of phase shifters to adjust a phase of the quantum state of light on one of the plurality of arms, each arm of the plurality of arms comprising a first phase shifter and a second phase shifter;
and
a second coupler network to couple phase-adjusted quantum state of light from the plurality of phase shifters and to combine the phase-adjusted quantum state of light in the second coupler network to form combined quantum state of light.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 18/943,551Filed 11 Nov 2024
Priority: 12 May 2022
Published: 27 Feb 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

G02F 1/011
For the control of the intensity, phase, polarisation or colour: in optical waveguides, not otherwise provided for in this subclass
G06N 10/40
Quantum computing, i.e. information processing based on quantum-mechanical phenomena: physical realisations or architectures of quantum processors…
G02B 6/2804
Having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals:…
G02F 1/0147
For the control of the intensity, phase, polarisation or colour: based on thermo-optic effects