Regular-Graph Optical Quantum Networks With Lower Photon Loss
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Solution Overview
Problem
Existing optical quantum networks face challenges in providing scalable connectivity and reducing photon loss as the size of the network increases, making it difficult to manage and manipulate large amounts of quantum information efficiently.
Innovation Solution
The implementation of a quantum network with a connected entanglement graph topology characterized by a plurality of vertices and edges, where each edge connects a pair of vertices, and nodes containing quantum systems and Bell State analyzers, utilizing optical paths and entanglement means like Bell state analyzers and shuttle paths to enable scalable concurrent quantum computations and entanglement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the size of the optical quantum network is scaled to include more quantum systems, then the connectivity and ability to manage quantum information increases, but the likelihood of photon loss increases
Solution Approach 1:
The patent segments the quantum network into distinct modules: quantum systems at nodes, optical links for communication, and switches for routing. This modular segmentation allows the network to scale by adding nodes while maintaining manageable complexity and reducing photon loss through localized control of optical paths.
Solution Approach 2:
The patent introduces optical switches as intermediary devices between quantum systems and optical links. These switches act as mediators that dynamically route photons through the network, enabling flexible connectivity while minimizing photon loss by selecting optimal paths and avoiding unnecessary intermediaries in the quantum information transmission path.
2Productivity
If the number of quantum systems is increased to manage large amounts of quantum information, then the computational capability increases, but the complexity of the interconnection system increases
Solution Approach 1:
The patent implements universal quantum systems at each node that can perform multiple functions: storing quantum information, generating photons for communication, and participating in entanglement operations. This multi-functionality reduces the need for specialized dedicated components for each function, thereby reducing overall system complexity while maintaining high computational capability.
Solution Approach 2:
The patent employs dynamic routing through controllable optical switches that can reconfigure the network topology in real-time. This dynamic adaptability allows the system to optimize the interconnection paths based on current computational needs, reducing the effective complexity of managing connections as the number of quantum systems scales.
3Ease of operation
If optical switches are added to guide photons along selected paths, then the connectivity control improves, but the system complexity and photon loss increase
Solution Approach 1:
The patent applies partial action by using optical switches only at strategic locations where connectivity control is most needed, rather than implementing switches at every possible interface. This selective placement provides sufficient connectivity control while minimizing the number of switching components and associated complexity in the system.
Data Source
AI summary
Quantum networks having topologies defined by connected entanglement graphs which comprise plural vertices connected by plural edges are disclosed. The entanglement graphs are not all-to-all connected. The entanglement graphs may be non-planar graphs. At least some of the vertices are connected to three or more of the edges. Nodes of the quantum network correspond to vertices of the entanglement graph. Entanglement means are operable to directly entangle quantum systems in those pairs of the nodes which respectively correspond to vertices of the entanglement graph that are connected by an edge of the entanglement graph. Optical paths used by the entanglement means may include optical paths provided by braids or knots that are configured to interface to one or more units which include the nodes.