Multi-user quantum key distribution with collective eavesdropping detection over collective-noise channels
Huang Wei†a), b) 
, Wen Qiao-Yana) , Liu Bina) , Gao Feia)
, Wen Qiao-Yan
Multi-user quantum key distribution with collective eavesdropping detection over collective-noise channels |
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Huang Wei†
, Wen Qiao-Yan |
| Definition of the function r ( U ) = r , where λ 1, λ 2, λ 3, and λ 4 are eigenvalues of the matrix U , and r is the distance between the origin of the complex plane o and the polygon λ 1 λ 2 λ 3 λ 4. Obviously, r = 0 indicates that o is in/on the polygon λ 1 λ 2 λ 3 λ 4. |
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