Simultaneous classical and quantum communication scheme based on coherent detection
An improved coherent communication scheme is provided. The coherent communication scheme encodes both classical and quantum information simultaneously using isolated groups of states: classical information is represented by different groups and can be decoded deterministically; and quantum information is represented by highly overlapped states within the same group, thus guaranteeing security. Decoding includes projecting the detection results at the receiver to one of the distinguishable encoding groups first, which allows the classical information to be read out, and then generating a quantum key from the residual randomness. This communications scheme enables simultaneous classical communication and QKD over the same communication channel using the same transmitter and receiver, opening the door to operate QKD in the background of classical communication and at negligible costs.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Number(s):
- 10,944,553
- Application Number:
- 15/952,873
- OSTI ID:
- 1805617
- Resource Relation:
- Patent File Date: 04/13/2018
- Country of Publication:
- United States
- Language:
- English
On-chip Continuous Variable Quantum Key Distribution System with Polarization and Frequency Division Multiplexing
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patent-application | June 2020 |
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