Physics – Quantum Physics
Scientific paper
2006-03-28
Physical Review A, 74, 062321 (2006)
Physics
Quantum Physics
7 figures, 9 pages. This paper is revised for increasing the readership for experimentalists. Hence, the mathematical part is
Scientific paper
10.1103/PhysRevA.74.062321
Generation and characterization of entanglement are crucial tasks in quantum information processing. A hypothesis testing scheme for entanglement has been formulated. Three designs were proposed to test the entangled photon states created by the spontaneous parametric down conversion. The time allocations between the measurement vectors were designed to consider the anisotropic deviation of the generated photon states from the maximally entangled states. The designs were evaluated in terms of the p-value based on the observed data. It has been experimentally demonstrated that the optimal time allocation between the coincidence and anti-coincidence measurement vectors improves the entanglement test. A further improvement is also experimentally demonstrated by optimizing the time allocation between the anti-coincidence vectors. Analysis on the data obtained in the experiment verified the advantage of the entanglement test designed by the optimal time allocation.
Hayashi Masahito
Jiang Yun-Kun
Matsumoto Keiji
Shi Bao-Sen
Tomita Akihisa
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