Title :
Experimental demonstration of entanglement robustness in four-qubits entangled system
Author :
Bourennane, M. ; Eibl, Matthias ; Kurtsiefer, Christian ; Weinfurter, Harald
Author_Institution :
Sekt. Phys., Ludwig-Maximilians-Univ., Munchen, Germany
Abstract :
The paper concentrates on a particular four-qubit entangled state which can be directly prepared experimentally by spontaneous parametric down-conversion. Peres-Horodecki criterion is applied, which states that for separable states p, the partial transpose of the density matrix ρ must have nonnegative eigenvalues.
Keywords :
optical frequency conversion; quantum computing; quantum entanglement; Peres-Horodecki criterion; density matrix; entanglement robustness; four-qubits entangled system; spontaneous parametric down-conversion; Bars; Complexity theory; Eigenvalues and eigenfunctions; Fasteners; Laser excitation; Multidimensional systems; Photonics; Protocols; Quantum entanglement; Quantum mechanics;
Conference_Titel :
Quantum Electronics Conference, 2003. EQEC '03. European
Print_ISBN :
0-7803-7733-8
DOI :
10.1109/EQEC.2003.1314263
