Entangled Photon Pair Provisioning via Orbital Angular Momentum Encoding
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Solution Overview
Problem
Current quantum communication systems face challenges in efficiently generating and storing entangled photon pairs for long-distance quantum teleportation due to issues with quantum noise and the inability to encode multiple bits of information on individual photons, limiting the data transmission capacity and reliability.
Innovation Solution
The system generates entangled photon pairs and stores them in a solid-light quantum memory, utilizing orbital angular momentum to label photons and applying filtering techniques like squeezing light and quantum nano-drums to reduce noise, enabling efficient encoding of multiple bits of information on individual photons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If photons are transmitted for quantum communication, then information can be transmitted, but quantum noise reduces reliability
Solution Approach 1:
The patent applies quantum noise filtering techniques that convert the harmful quantum noise into a manageable parameter. By using squeezing light and quantum nano-drums, the system filters out detrimental quantum fluctuations while preserving the essential quantum correlations needed for entanglement, thus converting noise from a harmful factor into a controlled aspect of the system.
Solution Approach 2:
The patent introduces quantum memory as an intermediary component between photon generation and transmission. This quantum memory stores entangled photon pairs temporarily, allowing for noise filtering and state preparation before transmission, thereby mediating between the photon source and the communication channel to improve reliability.
2Productivity
If individual photons carry information, then transmission capacity is limited to one bit per photon, but encoding multiple bits requires more complex photon states
Solution Approach 1:
The patent utilizes orbital angular momentum (OAM) of photons as an additional dimensional degree of freedom for encoding information. Instead of relying solely on polarization or presence/absence of photons, the system encodes multiple bits by assigning different OAM values to represent different data states, effectively adding a new dimension to the information encoding space.
Solution Approach 2:
The patent changes the physical parameters of photons by manipulating their orbital angular momentum states. By controlling and measuring different OAM values, the system enables multiple bits of information to be encoded in single photons through parameter variation rather than requiring multiple photons or complex multi-photon states.
3Length of stationary object
If entangled photon pairs are generated for long-distance teleportation, then quantum communication distance increases, but photon loss and noise accumulate
Solution Approach 1:
The patent implements preliminary entanglement generation and storage before actual teleportation operations. By pre-generating and storing entangled photon pairs in quantum memory, the system prepares the quantum channels in advance, allowing for verification and optimization of entanglement quality before long-distance transmission, thus preventing degradation from occurring during the communication process.
Solution Approach 2:
The patent maintains continuous entanglement generation and refilling of quantum memory to ensure uninterrupted quantum communication. This continuous operation allows for constant replenishment of entangled pairs, compensating for losses and noise accumulation over long distances by continuously providing fresh entangled states for teleportation.
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 approach enhances the reliability and capacity of quantum data transmission by reducing quantum noise and allowing for the encoding of multiple bits of information on individual photons, thereby improving the efficiency of quantum teleportation across long distances.
Implementation Method 1
adjusting an orbital angular momentum of the generated photon according to the label value, and generating a quantum entangled pair of photons based on the generated photon. The quantum entangled pair of photons include the orbital angular momentum according to the label value.
Implementation Method 2
applying filtering techniques like squeezing light and quantum nano-drums to reduce noise
Implementation Method 3
destructive quantum noise is reduced and/or removed through filtering techniques, such as squeezing light and/or quantum nano-drums to purify photons of the entangled pair
Implementation Method 4
Individual photons are stored to obtain stored photons of the quantum entangled pair of photons in an addressable memory element adapted to store a number of entangled pairs of photons including the entangled photon pair
Data Source
AI summary
Aspects of the subject disclosure may include, for example, determining a multi-bit value, adjusting an orbital angular momentum of a photon according to the multi-bit value, and generating a quantum entangled pair of photons based on the photon, wherein the quantum entangled pair of photons includes the orbital angular momentum according to the multi-bit value. A quantum state is applied to the quantum entangled pair of photons, while preserving the orbital angular momentum according to the multi-bit value. A photon of the quantum entangled pair of photons is directed to an addressable memory element adapted to store a number of entangled pairs of photons including the quantum entangled pair of photons. The photons of the entangled pair of photons are retrievable from the addressable memory element according to the multi-bit value to obtain a retrieved entangled pair of photons having the quantum state. Other embodiments are disclosed.