Title :
Practical free space quantum cryptography
Author :
Schmitt-Manderbach, T. ; Weier, H. ; Regner, N. ; Kurtsiefer, Ch. ; Weinfurter, H.
Author_Institution :
Sektion Physik, Ludwig-Maximilians-Univ., Munchen, Germany
Abstract :
A successful free space quantum cryptography experiment over a distance of 500 m using the BB84 protocol is reported. The obtained bit error rates of this experiment using faint coherent pulses with an average photon number ranging from 0.1 to 1.0 was measured to be below 3 percent for experiments carried out during night, leading to average raw key rates (before error correction and privacy amplification) of 50 kBits per second.
Keywords :
error statistics; optical communication; optical links; quantum cryptography; quantum optics; 50 kbit/s; 500 m; BB84 protocol; bit error rates; error correction; faint coherent pulses; free space quantum cryptography; privacy amplification; raw key rates; Clocks; Cryptography; Optical pulse generation; Optical receivers; Optical refraction; Optical sensors; Optical transmitters; Telescopes; Timing; Urban areas;
Conference_Titel :
Quantum Electronics Conference, 2005. EQEC '05. European
Print_ISBN :
0-7803-8973-5
DOI :
10.1109/EQEC.2005.1567471
