Title :
Beyond Werner: making optimally entangled arbitrary purity states
Author :
White, A.G. ; Munro, W.J. ; James, D.F.V. ; Kwiat, P.G.
Author_Institution :
Centre for Laser Sci., Queensland Univ., Brisbane, Qld., Australia
Abstract :
Summary form only given. Entangled states of multi-particle systems are arguably the quintessential feature of quantum mechanics. In addition to their central role in discussions of nonlocal quantum correlations, they form the basis of quantum information, and enable such phenomena as quantum cryptography, quantum dense coding, teleportation, and quantum computation. Yet surprisingly, to date only a limited class of entangled states has ever been produced. Via the process of spontaneous parametric downconversion in a pair of nonlinear crystals, it is now possible to produce, with high-efficiency, pairs of photons entangled in their polarization degree of freedom. Further, we can control both the extent of entanglement and the purity of the state.
Keywords :
light polarisation; optical correlation; optical frequency conversion; optical parametric devices; quantum computing; quantum cryptography; quantum optics; quantum theory; multi-particle systems; nonlinear crystals; nonlocal quantum correlations; optimally entangled arbitrary purity state production; polarization degree of freedom; quantum computation; quantum cryptography; quantum dense coding; quantum information; quantum mechanics; spontaneous parametric downconversion; state purity; teleportation; Quantum entanglement;
Conference_Titel :
Quantum Electronics Conference, 2000. Conference Digest. 2000 International
Conference_Location :
Nice, France
Print_ISBN :
0-7803-6318-3
DOI :
10.1109/IQEC.2000.907784
