16/01/2004, 15:00 — 16:00 — Sala P4.35, Pavilhão de Matemática
Yasser Omar, Instituto Superior Técnico
Entanglement, or the Physics of Teleportation
The entanglement of quantum states was first pointed out by E.
Schrödinger in 1935 as "the characteristic trait of quantum
mechanics", but only in the last decade did it start becoming
better understood and seen as a resource for many applications.
Entanglement offers correlations with no classical equivalent that
can be used for quite novel and unique information processing
tasks, such as quantum teleportation, quantum dense coding of
information and unconditionally secure quantum cryptographic key
distribution, amongst others. Entanglement may also be a sufficient
condition for the speed-up of certain quantum algorithms over their
classical counterpart and is an important tool for quantum error
correction. Yet, associated to the issue of non-locality since the
EPR problem (Einstein, Podolsky and Rosen, 1935), and despite the
progress allowed by Bell's theorem in 1964 and subsequent results,
entanglement remains one of the most surprising and mysterious
aspects of quantum mechanics. This talk will attempt to introduce
the essential ideas concerning entanglement and explain how it can
be used for the teleportation of a quantum state.
Apoiado por: Phys-Info (IT), SQIG (IT), CeFEMA e CAMGSD, com financiamento de FCT, FEDER and EU FP7, especificamente via o Doctoral Programme in the Physics and Mathematics of Information (DP-PMI), os projectos estratégicos FCT PEst-OE/EEI/LA0008/2013 e UID/EEA/50008/2013, o projecto IT QuSim, o projecto CRUP-CPU CQVibes, a Acção de Coordenação FP7 QUTE-EUROPE (600788) e os projectos FP7 Landauer (GA 318287) e PAPETS (323901).