535 research outputs found
Entanglement of macroscopically distinct states of light
Schr\"odinger's famous Gedankenexperiment has inspired multiple generations
of physicists to think about apparent paradoxes that arise when the logic of
quantum physics is applied to macroscopic objects. The development of quantum
technologies enabled us to produce physical analogues of Schr\"odinger's cats,
such as superpositions of macroscopically distinct states as well as entangled
states of microscopic and macroscopic entities. Here we take one step further
and prepare an optical state which, in Schr\"odinger's language, is equivalent
to a superposition of two cats, one of which is dead and the other alive, but
it is not known in which state each individual cat is. Specifically, the alive
and dead states are, respectively, the displaced single photon and displaced
vacuum (coherent state), with the magnitude of displacement being on a scale of
photons. These two states have significantly different photon statistics
and are therefore macroscopically distinguishable
Stabilization of Self-slaking Slags from Ferroalloy Production
In this study, the process of stabilization for highly basic self-slaking slags of ferroalloy production by various boron-containing materials were studied: tincalconite, colemanite, and ulexite (produced in Turkey). The viscosities and temperatures of crystallization for the initial boron-containing materials are determined. Under laboratory conditions, high-base slag melts were treated with boron-containing materials to obtain slags containing 0.25 and 0.5% B2О3. It was shown that the addition of boric anhydride to the studied slag melts extends the homogeneous-liquid state interval and reduces their viscosity by 1.2–1.6 times, therefore B2О3can be used as a tool for controlling slag mobility in industrial conditions. The industrial tests were conducted to stabilize the slag of low-carbon ferrochrome using powdered calcined, briquetted, and fused colemanite. After treatment, slags contained 43–47% CaO, 0.18–0.45% B2О3. The results of pilot-industrial experiments show that all applied boron-containing materials ensure slag stabilization and differ only in the degree of boron recovery. Fused colemanite showed the highest results in the recovery of B2О3(up to 98%), a commercial product was obtained which fully complies according to the technical characteristics with the requirements of Specification TU 0798-69-00186499-2014 “Crushed stone and sand from ferroalloy slags. Technical conditions.”
Keywords: ferroalloy, slag, self-slaking slag, stabilization, boron, two-calcium silicat
Entangled resource for interfacing single- and dual-rail optical qubits
Today's most widely used method of encoding quantum information in optical
qubits is the dual-rail basis, often carried out through the polarisation of a
single photon. On the other hand, many stationary carriers of quantum
information - such as atoms - couple to light via the single-rail encoding in
which the qubit is encoded in the number of photons. As such, interconversion
between the two encodings is paramount in order to achieve cohesive quantum
networks. In this paper, we demonstrate this by generating an entangled
resource between the two encodings and using it to teleport a dual-rail qubit
onto its single-rail counterpart. This work completes the set of tools
necessary for the interconversion between the three primary encodings of the
qubit in the optical field: single-rail, dual-rail and continuous-variable.Comment: Published in Quantu
Pharmacological evaluation polysaccharide complex flowers tansy
From flowers tansy extracted polysaccharide complex. Installed its qualitative and quantitative composition, have developed a technique standardizing the content of reducing sugars. By thin layer chromatography and high pressure liquid chromatography after acid hydrolysis installed monosaccharide composition: glucose, xylose, arabinose, galactose and mannose. It is proved that the polysaccharide has a high content of uronic acid, which allows it to include the class of pectin. The investigation of gastroprotective activity of polysaccharide in the prophylactic administration at model destruction of the gastric mucosa to indomethacin. Introduction polysaccharide prevents various types of erosive and ulcerative destruction. According to anti-ulcer activity of the drug is superior to ranitidine and comparable to omeprazol
On admissibility criteria for weak solutions of the Euler equations
We consider solutions to the Cauchy problem for the incompressible Euler
equations satisfying several additional requirements, like the global and local
energy inequalities. Using some techniques introduced in an earlier paper we
show that, for some bounded compactly supported initial data, none of these
admissibility criteria singles out a unique weak solution.
As a byproduct we show bounded initial data for which admissible solutions to
the p-system of isentropic gas dynamics in Eulerian coordinates are not unique
in more than one space dimension.Comment: 33 pages, 1 figure; v2: 35 pages, corrected typos, clarified proof
Risks and Dangers of New Information and Communication Technologies
The article describes the possible dangerous consequences of the introduction of new information and communication technologies, namely the destruction of conventional roles, of shared mental models due to the distortion of information and its context, the destruction of rutin interactions. The rapid development of science and technology in the late twentieth century led to the emergence of new information and communication technologies (ICT). In this regard, change the forms of communication and the relations between economic agents. This is particularly expressed in the change of conventional roles and common mental models. The possible negative consequences of the application of new ICT are discussed in the article, namely the increase in the probability of inaccuracies and errors in communications, the appearance of a gap in the senses or mutual understanding between the sending and receiving parties due to incorrect context transfer.The rapid change in the conditions of communications, its methods, increasing the share of verbal information leads to the destruction of the pre-rational basis of mutual understanding of people, and consequently to the restriction of economic growth according to G.V. Grebennikov.The solution of emerging problems is seen in the preservation of the traditional notion of communications (their goals, tasks, place in the relationship); determine their some necessary number and type. The preservation of common mental models depends on the preservation of their essential part – common values. We see that the Orthodox faith offers a person a higher ideal and values corresponding to him, as well as a way to achieve it, which can be tested by experience
Radiatively driven hypersonic wind tunnel
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76604/1/AIAA-12568-479.pd
Light-matter interaction between photonic bound states in the continuum and bright excitons in transition metal dichalcogenides
Being motivated by recent achievements in the rapidly developing fields of optical bound states in the continuum (BICs) and excitons in monolayers of transition metal dichalcogenides, we analyze strong coupling between BICs in Ta2O5 periodic photonic structures and excitons in WSe2 monolayers. We demonstrate that giant radiative lifetime of BICs allow to engineer the exciton-polariton lifetime enhancing it three orders of magnitude compared to a bare exciton.The work has been supported by the Ministry of Education and Science of the Russian Federation
(3.1668.2017/4.6), the Russian Foundation for Basic Research (16-37-60064) and the President
of Russian Federation (Grant MK-403.2018.2)
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