Optical modulation schemes for frequency-coded quantum key distribution

Author

Kumar, Kethavath Prem

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol. Kanpur, Kanpur, India

fYear

2010

fDate

29-31 Jan. 2010

Firstpage

1

Lastpage

5

Abstract

We discuss possible modulation schemes to implement BB84 and B92 quantum key distribution protocols using frequency-coding method. We derive time evolution of quantum states of light in a Mach-Zehnder interferometer based optical intensity modulator. We then show that phase modulator-phase modulator (PM-PM) combination can be used to implement the B92 protocol and intensity modulator-intensity modulator (IM-IM) combination can be used to implement the BB84 protocol. However, the combinations-PM-IM or IM-PM-cannot be used to implement BB84 and B92 protocols using frequency-coding method. Finally, we discuss the security of frequency-coded implementation of B92 protocol.

Keywords

cryptographic protocols; intensity modulation; interferometers; optical modulation; phase modulation; quantum cryptography; B92 quantum key distribution protocol; BB84 quantum key distribution protocol; IM-IM combination; Mach-Zehnder interferometer; PM-PM combination; frequency coding; frequency-coded quantum key distribution; intensity modulator-intensity modulator combination; optical intensity modulator; optical modulation; phase modulator-phase modulator combination; quantum states; security; time evolution; Electrooptic modulators; Frequency; Intensity modulation; Optical beams; Optical interferometry; Optical modulation; Phase modulation; Protocols; Quantum mechanics; Security; B92; BB84; Mach-Zehnder interferometer; electro-optic effect; phase modulator; quantum key distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (NCC), 2010 National Conference on

Conference_Location

Chennai

Print_ISBN

978-1-4244-6383-1

Type

conf

DOI

10.1109/NCC.2010.5430155

Filename

5430155