Cryptography Reference
In-Depth Information
250
IN = 0
1
0
2
IN = 0
1
1
2
200
150
100
50
0
1
1'
0
1'
1
1'
0
1'
250
IN = 1
1
1
2
IN = 1
1
0
2
200
150
100
50
0
0
1'
1
1'
0
1'
1
1'
Figure 6.6
Experimental results from a demonstration of a quantum parity check
operation. (Reprinted with permission from T.B. Pittman, B.C. Jacobs, and J.D. Franson,
Phys. Rev. Lett., 88, 257902, 2002. Copyright 2002 by the American Physical Society.)
detector
PBS-
1
α
0+
β
1
input
encoded output
α
00+
β
11
+
Φ
Bell state
Figure 6.7
Implementation of a quantum encoder using a polarizing beam splitter
(PBS) and an entangled pair of ancilla photons.