Table 4 The optimised squeezing parameters (γ) of the states shown in Eq. (1) with nmax = 7 photons.

From: Surpassing the repeaterless bound with a photon-number encoded measurement-device-independent quantum key distribution protocol

Distance (km)

Squeezing Parameter (γ)

0

0.84

0.5

0.83

1

0.83

2.5

0.82

5

0.81

10

0.71

15

0.52

20

0.44

25

0.40

30

0.37

40

0.33

50

0.30

100

0.26

200

0.25

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