Noise in the wire: The real impact of wire resistance for the Johnson(-like) noise based secure communicator

Noise in the wire: The real impact of wire resistance for the Johnson(-like) noise based secure communicator

We re-evaluate the impact of wire resistance on the noise voltage and current in the Johnson(-like) noise based secure communicator, correcting the result presented in [J. Scheuer, A. Yariv, Phys. Lett. A 359 (2006) 737]. The analysis shown here is based on the fluctuation–dissipation and the linear...

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Veröffentlicht in:Physics letters. A 2010-04, Vol.374 (21), p.2140-2142
Hauptverfasser: Kish, Laszlo B., Scheuer, Jacob
Format: Artikel
Sprache:eng
Schlagworte:
Electric potential
Fluctuation
Noise
Solid state physics
Theorems
Voltage
Wire
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Zusammenfassung:We re-evaluate the impact of wire resistance on the noise voltage and current in the Johnson(-like) noise based secure communicator, correcting the result presented in [J. Scheuer, A. Yariv, Phys. Lett. A 359 (2006) 737]. The analysis shown here is based on the fluctuation–dissipation and the linear response theorems. The results indicate that the impact of wire resistance in practical communicators is significantly lower than the previous estimation.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2010.03.021