Single electron relativistic clock interferometer

Although time is one of the fundamental notions in physics, it does not have a unique description. In quantum theory time is a parameter ordering the succession of the probability amplitudes of a quantum system, while according to relativity theory each system experiences in general a different proper time, depending on the system's world line, due to time to time dilation. It is therefore of fundamental interest to test the notion of time in the regime where both quantum and relativistic effects play a role, for example, when different amplitudes of a single quantum clock experience different magnitudes of time dilation. Here we propose a realization of such an experiment with a single electron in a Penning trap. The clock can be implemented in the electronic spin precession and its time dilation then depends on the radial (cyclotron) state of the electron. We show that coherent manipulation and detection of the electron can be achieved already with present day technology. A single electron in a Penning trap is a technologically ready platform where the notion of time can be probed in a hitherto untested regime, where it requires a relativistic as well as quantum description.Comment: 9 pages, 4 figure

THE MECHANISM OF THE CURRENT INVESTMENT PLANNING IN THE MANAGING OF THE ECONOMIC SECURITY OF AN ENTERPRISE

This paper is focused on investment planning in the enterprise economic security management. The actuality of the research is determined by the need for the identification and usage of the adaptation enterprise system in Russia in the current circumstances of the domestic problems and changes in the world economic relations. In work was formed the mechanism of realization the current investing planning (CIP). Besides, authors have highlighted the stages that provide factors of economic security of an enterprise in a short- and medium-term perspective. The research aim is in the development of the mechanism of the practical realization of the current investment planning on the base of its logical structure and the investment program of the business entity. The methodological base of the research was: the dialectical materialistic method, the method of the unity of logical and historical, the methods of the induction and deduction, analytical groups and also such scientific methods as the analysis and synthesis, the logic, the graphic method of the information interpretation

Leading-edge technologies and technical requirements for the production process of narrow gap welding

The article covers the setting up of technological requirements to the production process and equipment for narrow gap welding of special purpose machinery housing. It is shown, that development of original domestic welding technologies and equipment for mechanized welding allow to increase the level of quality stability of welding joints.В статье рассмотрены вопросы формирования технологических требований к технологиям и оборудованию для сварки по узкому зазору корпусных конструкций специальной техники. Показано, что разработка оригинальных отечественных сварочных технологий и оборудования для механизированной сварки позволяет повысить уровень воспроизводимости качества сварных соединений

Optical vector network analysis of ultra-narrow transitions in 166^{166}Er3+^{3+}:7^7LiYF4_4

We present optical vector network analysis (OVNA) of an isotopically purified $^{166}$Er$^{3+}$:$^7$LiYF$_4$ crystal. The OVNA method is based on generation and detection of modulated optical sideband by using a radio-frequency vector network analyzer. This technique is widely used in the field of microwave photonics for the characterization of optical responses of optical devices such as filters and high-Q resonators. However, dense solid-state atomic ensembles induce a large phase shift on one of the optical sidebands which results in the appearance of extra features on the measured transmission response. We present a simple theoretical model which accurately describes the observed spectra and helps to reconstruct the absorption profile of a solid-state atomic ensemble as well as corresponding change of the refractive index in the vicinity of atomic resonances.Comment: 4 pages, 5 figure