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1.
E. K. Bashkirov 《Laser Physics》2006,16(8):1218-1226
An exact solution is found for the collective model of two identical two-level atoms that resonantly interact with a two-mode quantum electromagnetic field in an ideal cavity via two-photon nondegenerate transitions. In the case under study, at the initial moment, both field modes are in the coherent state and atoms are in the excited state. The time dependences of the atomic probabilities, the mean number of photons in the modes, and the statistics and squeezing of the photon modes are studied based on the exact solution. 相似文献
2.
Collective radiation of a system of two three-level V-type atoms in a two-mode resonator with losses
E. K. Bashkirov 《Russian Physics Journal》2006,49(2):207-213
Collective spontaneous radiation of a system of two three-level V-type atoms interacting with two modes of a quantum electromagnetic
field in a resonator with finite Q-factor is investigated based on the control kinetic equation for the density matrix. Time
dependences of the average number of photons and radiation intensity of each mode are derived for the case in which atoms
at the initial moment of time are in different excited states.
__________
Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 78–83, February, 2006. 相似文献
3.
R. A. Fridman S. M. Nosakova L. G. Liberov A. N. Bashkirov 《Russian Chemical Bulletin》1977,26(3):614-615
Conclusions The treatment of Al-Re catalysts with tetraalkylstannanes substantially increases their activity in the disproportionation reactions of olefins and trimethylvinylsilane.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 678–679, March, 1977. 相似文献
4.
With the use of the nonpolynomial closure 1/
z
in the Mott-Smith approximation of the solution of the Boltzmann equation, we obtain a value of the density gradient in the limit of a very weak shock wave that is close to the correct value. For the determination of the transverse temperature gradient we calculated the
x
2
/
z
moment of the Mott-Smith collision integral. The effective values of viscosity and thermal conductivity in the limit of a very weak shock wave were calculated for inverse-power potentials and found to agree almost exactly with the Chapman-Enskog values. Such a comparison can serve as a criterion for the evaluation of different bimodal theories. Various bimodal theories give different values of viscosity and thermal conductivity, but all of them give 33 % too high a value of the Eucken ratio. 相似文献
5.
Long Zhao Ralf I. Kaiser Bo Xu Utuq Ablikim Musahid Ahmed Mikhail M. Evseev Eugene K. Bashkirov Valeriy N. Azyazov Alexander M. Mebel 《Angewandte Chemie (International ed. in English)》2020,59(10):4051-4058
A unified low‐temperature reaction mechanism on the formation of acenes, phenacenes, and helicenes—polycyclic aromatic hydrocarbons (PAHs) that are distinct via the linear, zigzag, and ortho‐condensed arrangements of fused benzene rings—is revealed. This mechanism is mediated through a barrierless, vinylacetylene mediated gas‐phase chemistry utilizing tetracene, [4]phenacene, and [4]helicene as benchmarks contesting established ideas that molecular mass growth processes to PAHs transpire at elevated temperatures. This mechanism opens up an isomer‐selective route to aromatic structures involving submerged reaction barriers, resonantly stabilized free‐radical intermediates, and systematic ring annulation potentially yielding molecular wires along with racemic mixtures of helicenes in deep space. Connecting helicene templates to the Origins of Life ultimately changes our hypothesis on interstellar carbon chemistry. 相似文献
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We investigate the entanglement properties of a system of two dipole-dipole coupled two-level atoms resonantly interacting
with a two-mode thermal field in a high-Q cavity. We obtain the evolution operator for this system in an analytical form, and use it to evaluate the atom-atom entanglement
through the calculation of the negativity. The results show that the atom-atom entanglement is dependent on cavity field intensity
and dipole interaction strength. We find that the dipole interaction can produce a considerable amount of entanglement between
the two atoms.
Original Text ? Astro, Ltd., 2009.
The article is published in the original. 相似文献