The space flight of the Soviet-Indian crew

After a brief discussion of the Indian space program, the paper examines the flight of the Soyuz T-11, which included an Indian crew member. Particular attention is given to experiments conducted aboard Soyuz T-11, including the Optokinez vestibular experiment, the Vektor cardiac bioelectricity experiment, the yoga experiment for the counteraction of the negative effects of weightlessness, a supercooling experiment, and the Terra remote sensing experiment

Limitations on squeezing and formation of the superposition of two macroscopically distinguishable states at fundamental frequency in the process of second harmonic generation

The results of numerical simulations of quantum state evolution in the process of second harmonic generation (SHG) are discussed. It is shown that at a particular moment of time in the fundamental mode initially coherent state turns into a superposition of two macroscopically distinguished states. The question of whether this superposition exhibits quantum interference is analyzed

Quantum protocols at presence of non-abelian superselection rules in the framework of algebraic model

In this paper, we study the influence of non-abelian superselection rules on the transfer of quantum information with the help of qubits on the base of an algebraic model and formulate quantum protocols. We pay the main attention to the superselection structure of the algebra of observables OG defined by the Cuntz algebra Od (a field algebra) that contains OG as a pointwise fixed subalgebra with respect to the action of the gauge group G. We prove that it is possible to code information only with the help of states such that projectors on them belong to the algebra of observables and, owing to their commutativity with elements of the representation of the group G, they allow the recipient to restore the obtained informatio

Exotic solutions in string theory

Solutions of classical string theory, correspondent to the world sheets, mapped in Minkowsky space with a fold, are considered. Typical processes for them are creation of strings from vacuum, their recombination and annihilation. These solutions violate positiveness of square of mass and Regge condition. In quantum string theory these solutions correspond to physical states |DDF>+|sp> with non-zero spurious component.Comment: accepted in Il Nuovo Cimento A for publication in 199

The Kosmos-1129 biosatellite

A number of experiments, designed by participating specialists from several countries, are described. The experiments included studies in biorhythm, stress, body parts, behavior, ontogenesis, and gravitational preference. The biological subjects of the experiments were retrieved immediately after the landing of the satellite and examined in a field laboratory

Relativistic Coulomb problem for particles with arbitrary half-integer spin

Using relativistic tensor-bispinorial equations proposed in hep-th/0412213 we solve the Kepler problem for a charged particle with arbitrary half-integer spin interacting with the Coulomb potential.Comment: Misprints are correcte