Secure Communication using Gaussian-State Quantum Illumination

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SECOQC: Development of a Global Network for Secure Communication based on Quantum Cryptography, http://www.secoqc.net

Cited in the paper.

This state has maximum quadrature entanglement for its average photon number. Its closest classical-state counterpart is the zero-mean, jointly Gaussian state whose Wigner-distribution covariance is given by ( 1

Cited in the paper.

At near-infrared through ultraviolet wavelengths, background light will be sufficiently weak in both fiber and free-space channels that it can be ignored. For example, a typical daytime spectral radiance value of 10 W/m 2 sr μ \mu m at 1.55 μ \mu m wavelength Bordogna leads to ⟨ e ^ B m † ​ e ^ B m ⟩ ∼ 10 − 6 \langle\hat{e}_{B_{m}}^{\dagger}\hat{e}_{B_{m}}\rangle\sim 10^{-6} for a line-of-sight terrestrial link; nighttime values are several orders of magnitude lower. Our noiseless channel model will suffice so long as N S ≫ 10 − 6 N_{S}\gg 10^{-6}

Cited in the paper.

This assumption affords a passive eavesdropper Eve the maximum information about Bob’s message short of what she could obtain by mounting a man-in-the-middle attack. Thus the error probability disparity—between Alice and Eve’s receivers—that we will demonstrate will only increase

Cited in the paper.

S. Guha, arXiv:0902.2932 [quant-ph]

Original

Cited in the paper.

The Bhattacharyya bound is the Chernoff bound with s = 1 / 2 s=1/2 used even when it is not the optimum choice

Cited in the paper.

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