Optical Quantum Logic Gates With State-Preserving Amplification
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Solution Overview
Problem
Conventional optical processing systems face inefficiencies due to the need for electronic-optical conversions, which result in energy loss and slowed data transmission, while all-optical computing aims to eliminate these conversions to enhance processing rates and reduce power consumption.
Innovation Solution
An optical quantum logic gate (OQLG) utilizing a multi-core optical fiber with optically-coupled cores and amplifying channels, where photons are mixed and amplified in a controlled manner to preserve quantum states, enabling operations defined by a 2n*2n unitary matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If optoelectronic processing is used, then optical signals can be transmitted and processed, but energy is lost during conversion and processing speed is reduced
Solution Approach 1:
The patent replaces the optoelectronic conversion mechanism with a fully optical processing system. Optical signals are processed directly through optical components (modulators, switches, waveguides) without converting to electrical signals, thereby eliminating the energy loss and speed limitation associated with OEO conversions while maintaining the ability to perform computation and data transmission operations
Solution Approach 2:
The patent creates a universal optical processing platform where a single optical signal can perform multiple functions including data transmission, logic operations, and quantum computing tasks. The system integrates various optical components to enable one optical signal to serve multiple computational roles, improving processing efficiency and eliminating the need for separate conversion processes
2Productivity
If all-optical computing is implemented, then processing rate increases and power consumption decreases, but quantum state preservation becomes challenging
Solution Approach 1:
The patent changes the operational parameters of the optical system to operate at quantum-level precision. By adjusting optical parameters such as phase, amplitude, and polarization states, the system maintains quantum coherence while achieving high processing rates. The optical components are designed to preserve quantum states through precise parameter control rather than relying on electrical conversions
Solution Approach 2:
The patent introduces optical intermediaries such as optical amplifiers and quantum memory devices that facilitate the preservation of quantum states during optical processing. These intermediary components act as buffers that maintain quantum coherence while enabling the high-speed optical operations, thereby resolving the conflict between processing rate and quantum state reliability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The OQLG facilitates faster and more efficient optical computing by maintaining quantum states and allowing for parallel processing, reducing the need for electronic conversions and enhancing computing speed and energy efficiency.
Implementation Method 1
use optical coupling between the cores to mix the injected photons, wherein photons are mixed with weights specified by the unitary matrix
Implementation Method 2
amplify photons in the amplifying channels, wherein the amplifying is provided in a controllable manner with preserving, for photons propagating in the amplifying channels, the fundamental quantum states thereof
Data Source
AI summary
There are provided optical quantum logic gate (OQLG) characterized by 2n*2n unitary matrix and method of operating thereof. OQLG comprises first optical structure comprising 2n optically-coupled cores with one-to-one correspondence to input binary values specified by the matrix and second optical structure optically connected to the first optical structure and comprising 2n amplifying channels corresponding to the 2n cores. The first optical structure is configured to receive photons in binary fundamental quantum states (FQSs) representing input binary values specified by the matrix and to inject the received photons in the 2n cores, use optical coupling between the cores to mix the injected photons, and output photons into the second optical structure, wherein outputted mixed photons correspond to output binary values specified by the matrix. The second optical structure is configured to amplify, in a controllable manner, photons in the amplifying channels with preserving the FQSs and relative quantities of photons with different FQSs.