840 research outputs found
Observation of polarization quantum noise of laser radiation in Rb vapor cell
We present experimental study of polarization quantum noise of laser
radiation passed through optically think vapor of Rb87. We observe a step-like
noise spectrum. We discuss various factor which may result in such noise
spectrum and prevent observation of squeezing of quantum fluctuations predicted
in Matsko et al. PRA 63, 043814 (2001).Comment: 4 pages, 5 figures. Translated from Russian by I. Novikov
Measurements of vector magnetic field using multiple electromagnetically induced transparency resonances in Rb vapor
We study intensity distribution of transmission resonances under the
conditions of electromagnetically induced transparency (EIT) with lin||lin
configuration in 87Rb vapor. We demonstrate that for various orientations of
the external magnetic field all seven resolved EIT resonances exhibit maxima or
minima at certain directions of the linear polarization of the laser field.
This effect can be used for development of a high-precision vector EIT
magnetometer.Comment: 4 pages, 4 figure
Large negative and positive delay of optical pulses in coherently prepared dense Rb vapor with buffer gas
We experimentally study the group time delay for a light pulse propagating
through hot Rb vapor in the presence of a strong coupling field in a
configuration. We demonstrate that the ultra-slow pulse propagation is
transformed into superluminal propagation as the one-photon detuning of the
light increases due to the change in the transmission resonance lineshape.
Negative group velocity as low as -c/10^6=-80 m/s is recorded. We also find
that the advance time in the regime of the superluminal propagation grows
linearly with increasing laser field power.Comment: 5 pages, 6 figure
Compositional materials with controllable vibration damping parameters
The paper proposes laminated sandwich-elements containing electrorheological composite as a structural element, which enable designing novel thin-wall structures with a locally varying rigidity and vibrostability for aerospace engineering, ship-building, high-speed devices in mechanical engineering (machine tools, robots), in transport means (controlled springs), in instrument fabrication, et
EIT and diffusion of atomic coherence
We study experimentally the effect of diffusion of Rb atoms on
Electromagnetically Induced Transparency (EIT) in a buffer gas vapor cell. In
particular, we find that diffusion of atomic coherence in-and-out of the laser
beam plays a crucial role in determining the EIT resonance lineshape and the
stored light lifetime.Comment: 5 pages, 8 figure
Legal regulation of interreligious relations in the field of general education: the ratio of public and private interests
In article on the basis of the formal legal analysis of the national legal system and the international jurisprudence the key principles of state legal regulation of the confessional relations in the sphere of the general education are distinguished; the need of their addition and unification at the national level for the purpose of providing the balanced ratio of public and private interests in the context of providing the integrated rights and personal freedoms is demonstrate
Constitutional court in public administration system in Moldova and Russia
The article considers the place and the role of the Constitutional Court of Moldova in the system of governmen
Agreements in criminal processes: problems of application and development
In this paper, institutions of agreements (mediation) in criminal proceedings in various states were investigated regarding the history of their occurrence and development. The aspects under the study included features related to the use of institutions of agreement in individual countries (USA, Canada, Germany, Russia, Moldova, etc.); the regulatory framework of these countries, statistics on the use of institutions of agreements (mediation), as well as programs used as mediatio
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