Quantum Communication System Entangled Photon Polarization Encoding
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Solution Overview
Problem
Current quantum communication systems using entangled photons are limited in transmitting continuous or discrete values rapidly and quasi-instantaneously over long distances, and they do not effectively utilize all polarization configurations, restricting the amount of information that can be transmitted.
Innovation Solution
A quantum communication system comprising an emitter of entangled photons, a first receiver with a complex absorber that selects specific polarization states, and a second receiver with an optical amplifier and measuring instrument to determine the polarization state of the first photon, allowing for the transmission of continuous or discrete values without latency, regardless of distance, by using entangled photons to encode and decode information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If entangled photons are used to transmit information, then transmission speed is improved, but the system is limited in utilizing all polarization configurations
Solution Approach 1:
The patent changes the parameter of polarization configuration utilization by employing a complex absorber that can selectively absorb photons in specific polarization states (excluding two pairs of perpendicular linear polarizations at 45°). This selective absorption mechanism enables the system to utilize a wide range of polarization states for encoding information, thereby resolving the contradiction between transmission speed and adaptability.
2Productivity
If a complex absorber is used to select specific polarization states, then information transmission capacity is improved, but device complexity increases
Solution Approach 1:
The complex absorber is designed to perform multiple functions: it selectively absorbs photons in specific polarization states, enables encoding of continuous or discrete values, and works with entangled photon pairs. By making this single component multi-functional, the patent increases information transmission capacity without proportionally increasing overall device complexity.
3Length of stationary object
If entangled photons are transmitted over long distances, then communication range is improved, but latency-free transmission becomes more difficult
Solution Approach 1:
The patent employs preliminary action by generating and entangling photon pairs before transmission, and by using the complex absorber to immediately select and absorb photons in specific polarization states upon reception. This preliminary preparation and immediate processing enables latency-free transmission over long distances by eliminating processing delays.
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
Enables rapid and latency-free transmission of information over long distances by entangling photons, allowing for the transmission of continuous or discrete values, and utilizing a wide range of polarization states to encode data, thereby enhancing communication efficiency.
Implementation Method 1
Entangled photons are photons whose quantum states, for example their polarization, depend on one another regardless of the distance between them
Implementation Method 2
a complex absorber configured in order to absorb the photon in a polarization state selected from among the states of at least two different pairs of complementary polarization states
Implementation Method 3
an optical amplifier making it possible to multiply the second photon while preserving its polarization
Data Source
AI summary
The invention relates to a quantum communication system (1), which comprises: ⋅ an entangled photon transmitter (2) comprising a source which is configured to generate at least one pair of entangled photons comprising a first photon (P1) emitted on a first propagation path (D1) and a second photon (P2) emitted on a second propagation path (D2); ⋅ a first receiver (3) which is arranged on the first propagation path (D1) and comprises a first instrument (35), which is arranged to absorb the first photon in one of two complementary polarisations, and an optical selector (30), which is configured either to allow the first photon to pass towards said first measuring instrument (35) or to prevent it from being measured; and ⋅ a second receiver (4) which is arranged on the second propagation path (D2) and comprises an optical amplifier (40), which makes it possible to demultiply the second photon while maintaining its polarisation, and a measuring instrument (45), which makes it possible to measure the average quantum state of the demultiplied photons (P20).