A quantum volume hologram

We propose a new scheme for parallel spatially multimode quantum memory for light. The scheme is based on counter-propagating quantum signal wave and strong classical reference wave, like in a classical volume hologram, and therefore can be called a quantum volume hologram. The medium for the hologram consists of a spatially extended ensemble of atoms placed in a magnetic field. The write-in and read-out of this quantum hologram is as simple as that of its classical counterpart and consists of a single pass illumination. In addition we show that the present scheme for a quantum hologram is less sensitive to diffraction and therefore is capable of achieving higher density of storage of spatial modes as compared to previous proposals. A quantum hologram capable of storing entangled images can become an important ingredient in quantum information processing and quantum imaging.Comment: 8 pages, 2 figure

ПОКАЗАТЕЛИ ЛАБОРАТОРНЫХ И ИНСТРУМЕНТАЛЬНЫХ МЕТОДОВ ИССЛЕДОВАНИЯ ПРИ РОТАВИРУСНОЙ ИНФЕКЦИИ У ДЕТЕЙ

The results of laboratory and imaging studies 128 patients with a diagnosis of early childhood rotavirus infection. Mono-rotavirus infection in 55,3% of cases proceeded with symptoms of gastroenteritis, severe dehydration accompanied by varying degrees of severity. Mixed-rotavirus infection in 53,5% of cases proceeded with a syndrome characterized by severe enteritis and toxic syndrome. In severe forms of rotavirus infection marked by dysfunction of the liver, pancreas, and the characteristic changes in biochemical and clinical parameters.Представлены результаты лабораторных и инструментальных методов исследования 128 пациентов раннего возраста с диагнозом «Ротавирусная инфекция». Моноротавирусная инфекция в 55,3% случаев протекала с явлениями гастроэнтерита, тяжелые формы сопровождались обезвоживанием различной степени выраженности. Микст-ротавирусная инфекция в 53,5% случаев протекала с синдромом энтерита и характеризовалась выраженным токсическим синдромом. При тяжелых формах ротавирусной инфекции отмечены нарушения функции печени, поджелудочной железы и характерные изменения биохимических и клинических показателей

Attributing scientific and technical progress: the case of holography

Holography, the three-dimensional imaging technology, was portrayed widely as a paradigm of progress during its decade of explosive expansion 1964–73, and during its subsequent consolidation for commercial and artistic uses up to the mid 1980s. An unusually seductive and prolific subject, holography successively spawned scientific insights, putative applications and new constituencies of practitioners and consumers. Waves of forecasts, associated with different sponsors and user communities, cast holography as a field on the verge of success—but with the dimensions of success repeatedly refashioned. This retargeting of the subject represented a degree of cynical marketeering, but was underpinned by implicit confidence in philosophical positivism and faith in technological progressivism. Each of its communities defined success in terms of expansion, and anticipated continual progressive increase. This paper discusses the contrasting definitions of progress in holography, and how they were fashioned in changing contexts. Focusing equally on reputed ‘failures’ of some aspects of the subject, it explores the varied attributes by which success and failure were linked with progress by different technical communities. This important case illuminates the peculiar post-World War II environment that melded the military, commercial and popular engagement with scientific and technological subjects, and the competing criteria by which they assessed the products of science