When basic tools of quantum information are applied to the quantum tomography data presented in [1], none of their devices appears to be a source of entangled photons. In a paper titled " A semiconductor quantum source of triggered entangled photon pairs " Stevenson et. al. [1] claim to find evidence for the emission of polarization entangled photons from certain quantum dots. A density matrix ...

1Department of Medicine, Division of Hematology, Karolinska University Hospital Solna and Karolinska Institutet, Stockholm, Sweden; 2Division of Cancer Epidemiology and Genetics, National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, MD; 3Center for Cancer Research, NCI, NIH, Bethesda, MD; 4Department of Medicine, Section of Hematology and Coagulation, Sahlgrenska Unive...

The CLEO collaboration has studied two-body charmless hadronic decays of B mesons into nal states containing two pseudo-scalar mesons, or a pseudo-scalar and a vector meson. We summarize and discuss results presented during the winter/spring 1999 conference season, and provide a brief outlook towards future attractions to come. In particular, CLEO presented preliminary results on the decays B !...

v:* {behavior:url(#default#vml);} o:* {behavior:url(#default#vml);} w:* {behavior:url(#default#vml);} .shape {behavior:url(#default#vml);} introduction: sleeping is one of the important biological needs of human beings which has an important role in maintaining health and quality of life. driving is one of the occupational groups in which the quality of sleep is of a great importance for job pe...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 vascular neoplasms, other than benign are characterized as intermediate or malignant. they are often enshrouded in controversy, because the same neoplasm could show variability in biologic behavior that may not be correlated with microscopic features. the intermediate grade vascular neoplasm is named as epithelioid hemangi...