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Quantum cryptography via partially entangled pure states

Grant number: 12/13915-4
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): October 01, 2012
Effective date (End): September 30, 2013
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Gustavo Garcia Rigolin
Grantee:Guilherme Arantes Canella
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

We intend to study in detail two of the most important quantum communication protocols ever invented: the BB84 quantum key distribution protocoland the quantum teleportation protocol. Then we will study howto implement the teleportation protocol when the quantum channel shared between Alice andBob is no longer perfectly entangled. With these tools we will investigate,finally, ways to combine the main ideas contained in these two protocolsin the construction of new quantum cryptography protocols.