Phase Shifter, Quantum Logic Gate Apparatus, Optical Quantum Computing Apparatus, and Phase Shift Method
AssigneeHuawei Technologies Co., Ltd.
InventorsWen Zhang, Chen-Xiong Zhang
Life of this patent
Estimating the term…
Abstract
A phase shifter, a quantum logic gate apparatus, an optical quantum computing apparatus, and a phase shift method, where the phase shifter includes an optical resonant cavity and a quantum point, where a resonance frequency of the optical resonant cavity is ωc, the quantum point is located in the optical resonant cavity, and a transition frequency of the quantum point is ωx, the quantum point and the optical resonant cavity are coupled to form a coupled system, and a transition energy difference of the coupled system is determined by ωc, ωx, and a coupling strength between the quantum point and the optical resonant cavity (g), and ωx is set.
Claims20
A phase shifter, comprising:
- an optical resonant cavity, a resonance frequency of the optical resonant cavity being ωc;
- and
- a quantum point located in the optical resonant cavity, a transition frequency of the quantum point being ωx, the quantum point and the optical resonant cavity being coupled to form a coupled system, a transition energy difference of the coupled system being determined by the ωc, the ωx, and a coupling strength between the quantum point and the optical resonant cavity g, and the ωx being set to enable the transition energy difference of the coupled system to be same as energy of at least one photon input into the coupled system.
The phase shifter of 1, wherein the ωx is set to enable a transition energy difference for transition of the coupled system from a ground state to a first-order dressed state to be same as energy of one photon input into the coupled system.
A quantum, logic gate apparatus. comprising:
- a first optical splitter;
- a second optical splitter;
- and
- two first phase shifters are coupled between the first optical splitter and the second optical splitter using a waveguide, and each first phase shifter comprising:
- an optical resonant cavity, a resonance frequency of the optical resonant cavity being ωc;
- and
- a quantum point located in the optical resonant cavity, a transition frequency of the quantum point being ωx, the quantum point and the optical resonant cavity being coupled to form a coupled system, a transition energy difference of the coupled system being determined by the ωc, the ωx, and a coupling strength between the quantum point and the optical resonant cavity (g), and the ωx being set to enable the transition energy difference of the coupled system to be same as energy of at least one photon input into the coupled system.
A quantum logic gate apparatus, apparatus comprising:
- a first optical splitter;
- a second optical spikier;
- two first phase shifters coupled between the first optical splitter and the second optical splitter using a waveguide;
- a third optical splitter;
- a fourth optical splitter;
- two second phase shifters coupled between the third optical splitter and the fourth optical splitter using another waveguide;
- a fifth optical splitter, two output ends of the fifth optical splitter being respectively coupled to an input end of the first optical splitter and an input end of the third optical splitter using first waveguides;
- and
- a sixth optical splitter, two input ends of the sixth optical splitter being respectively coupled to an output end of the second optical splitter and an output end of the fourth optical splitter using second waveguides, and
- each one of the two first phase shifters and the two second phase shifters comprising:
- an optical resonant cavity, a resonance frequency of the optical resonant cavity being ωc;
- and
- a quantum point located in the optical resonant cavity, a transition frequency of the quantum point being ωx, the quantum point and the optical resonant cavity being coupled to form a coupled system, a transition energy difference of the coupled system being determined by the ωc, the ωx, and a coupling strength between the quantum point and the optical resonant cavity (g), and the ωx being set to enable the transition energy difference of the coupled system to be same as energy of at least one photon input into the coupled system.
An optical quantum computing apparatus, comprising at least one quantum logic gate apparatus, and the at least one quantum logic gate apparatus comprising:
- a first optical splitter;
- a second optical splitter;
- and
- two first phase shifters coupled between the first optical splitter and the second optical splitter using a waveguide, and each first phase shifter comprising:
- an optical resonant cavity, a resonance frequency of the optical resonant cavity being ωc;
- and
- a quantum point located in the optical resonant cavity, a transition frequency of the quantum point being ωx, the quantum point and the optical resonant cavity being coupled to form a coupled system, a transition energy difference of the coupled system being determined by the ωc, the ωx and a coupling strength between the quantum point and the optical resonant cavity (g), and the ωx being set to enable the transition energy difference of the coupled system to be same as energy of at least one photon input into the coupled system.
A phase shift method, applied to a coupled system formed by coupling an optical resonant cavity and a quantum point is located in the optical resonant cavity, and the method comprising:
- obtaining a resonance frequency of the optical resonant cavity (ωc), a transition frequency of the quantum point (ωx), and a coupling strength of coupling between the quantum point and the optical resonant cavity (g);
- determining a transition energy difference of the coupled system based on the ωc, the ωx, and the g;
- and
- adjusting the ωx to enable the transition energy difference of the coupled system to be same as energy of at least one photon input into the coupled system.
Dependencies are inferred from the claim text.