Title :
Continuous variable key distribution: beating the 3 dB loss limit
Author :
Silberhorn, Christine ; Lutkenhaus, Norbert ; Ralph, Timothy C. ; Leuchs, Gerd
Author_Institution :
Phys. Inst., Erlangen-Nurnberg Univ., Erlangen, Germany
Abstract :
It was believed until recently that quantum key distribution with continuous variables would be restricted to losses below 3 dB due to the beam splitting attack. We show that post-selection allows to overcome this limitation.
Keywords :
optical beam splitters; optical losses; quantum cryptography; quantum optics; beam splitting; continuous variable key distribution; loss limit; quantum key distribution; Cloning; Density measurement; Eigenvalues and eigenfunctions; Polarization; Quantum entanglement; Robustness; State estimation; Teleportation; Tomography;
Conference_Titel :
Quantum Electronics Conference, 2003. EQEC '03. European
Print_ISBN :
0-7803-7733-8
DOI :
10.1109/EQEC.2003.1314262
