Integrated Photonic Chip for Secure Quantum Computation
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Solution Overview
Problem
In distributed quantum computation systems, ensuring the security of client algorithms is a significant challenge, as existing security schemes primarily focus on data protection rather than algorithm secrecy, which is crucial for maintaining privacy and security in quantum computation tasks.
Innovation Solution
An integrated photonic chip system is developed, comprising a client and server chip connected via a high-dimensional quantum channel, utilizing a configurable entangled multi-photon source, linear optical networks for initial state preparation, unitary transformations, and projective measurements, allowing clients to configure linear coefficients hidden from the server, ensuring secure computation by encrypting communication and protecting client privacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a distributed quantum computation model is adopted with client-server architecture, then quantum computation resources can be shared and computation tasks can be completed remotely, but the security of client algorithms is compromised as the server can access and potentially steal algorithm information
Solution Approach 1:
The patent segments the quantum computation task into two parts: quantum circuit execution (performed by the server) and algorithm parameters (kept private by the client). The client only provides input states and receives output states, while the server performs unitary operations without accessing the client's algorithm. This segmentation resolves the contradiction by allowing distributed computation while protecting algorithm security through separation of concerns.
Solution Approach 2:
The patent introduces quantum channels as intermediaries between the client and server. These channels transmit quantum states without allowing the server to access or interpret the client's algorithm. The quantum channel acts as a secure mediator that enables computation task transmission while maintaining algorithm secrecy, thus resolving the security issue in distributed quantum computation.
2Reliability
If existing quantum security schemes are used that focus on data protection, then client data can be protected, but algorithm secrecy is not ensured as the server can still access and execute client algorithms
Solution Approach 1:
The patent extracts the algorithm parameters from the quantum computation process and keeps them separate from the quantum channel communication. The client's algorithm is encoded in the initial quantum states and input parameters, which are transmitted through quantum channels without exposing the algorithm itself to the server. This extraction of algorithm information from the computation process ensures both data security and algorithm privacy.
3Volume of stationary object
If integrated photonic chip technology is used, then system volume is decreased and stability is improved, but the complexity of implementing secure distributed computation increases
Solution Approach 1:
The patent merges multiple quantum optical components onto a single integrated photonic chip, combining quantum state preparation, unitary operation execution, and measurement functions into one compact device. This integration reduces system volume while the modular chip architecture helps manage implementation complexity by breaking down the secure distributed computation into standardized functional blocks that can be independently optimized and manufactured.
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
This solution enables secure remote hosting of quantum computation tasks on a server while keeping the client's algorithm hidden, enhancing computation privacy and preventing information theft, thereby improving the security of quantum computations in client-server models.
Implementation Method 1
By configuring a first phase shifter and a second phase shifter in the configurable optical network to perform interference regulation on a light beam inputted to the configurable optical network
Implementation Method 2
The wavelength division multiplexer is configured to respectively output, according to wavelengths, the plurality of photons outputted by the configurable entangled multi-photon source
Implementation Method 3
a unitary operator configuration linear optical network U, correspondingly connected to the initial state preparation linear optical network O, and configured to acquire a linear term coefficient, perform unitary transformation and linear combination
Implementation Method 4
a projective measurement linear optical network T, correspondingly connected to the unitary operator configuration linear optical network U, and configured to perform projective measurement on an photonic quantum state
Implementation Method 5
After a client and a server are connected through a high-dimensional quantum channel
Data Source
AI summary
The invention provided is an integrated photonic chip system for distributed secure quantum information processing. This system includes a server integrated photonic quantum chip and a client integrated photonic quantum chip. The server integrated photonic quantum chip includes: a configurable entangled multi-photon source, configured to generate a plurality of photons and respectively output the photons to a server linear optical network and a client linear optical network according to wavelengths; the server linear optical network, configured to prepare an initial state for the photons outputted by a wavelength division multiplexer, perform unitary transformation and linear combination, perform beam combination, and perform projective measurements on the photons that have been subjected to beam combination; and the client integrated photonic quantum chip, configured to transmit the coefficient of linear terms through quantum teleportation, so as to perform linear combination on each item of unitary transformation in the server integrated photonic quantum chip. A server cannot know a specific computation task of a client, but can inform the client of a result through a classical channel after one computation is completed. By using the technical solution of the embodiments of the present disclosure, the computation privacy of the clients is protected.