Title :
Free space quantum cryptography with compact modules
Author :
Weier, Henning ; Schmitt-Manderbach, T. ; Zarda, P. ; Halder, Mitali ; Kurtsiefer, Ch. ; Weinfurter, Harald ; Gorman, P.M. ; Tapster, P.R. ; Rarity, J.G.
Author_Institution :
Sektion Physik, Ludwig-Maximilians-Univ., Munchen, Germany
Abstract :
The paper reports on a free space quantum cryptography experiment over a distance of 24.3 km using a BB84 protocol between the summits of two mountains. The obtained bit error rates in this experiment using faint coherent pulses with an average photon number ranging from 0.1 to 0.7 was measured to range from 3 to 5 percent for experiments carried out during night, leading to raw key rates (before error correction and privacy amplification) of 1500 bits per second.
Keywords :
error correction; error statistics; modules; protocols; quantum cryptography; 1500 bit/s; 24.3 km; BB84 protocol; bit error rates; compact modules; error correction; free space quantum cryptography; photon number; privacy amplification; Communication switching; Cryptography; Delay; Laboratories; Laser excitation; Optical imaging; Optical receivers; Polarization; Quantum computing; Voltage;
Conference_Titel :
Quantum Electronics Conference, 2003. EQEC '03. European
Print_ISBN :
0-7803-7733-8
DOI :
10.1109/EQEC.2003.1314260
