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Найдены 152 публикации
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Статья
Kolokolov I., Vorobyov P., Fogel' V. JETP Letters. 1989. Vol. 50. No. 2. P. 65-67.
Добавлено: 30 марта 2017
Статья
Belavin A., Gepner D., Kononov Y. JETP Letters. 2016. Vol. 103. No. 3. P. 152-156.

It was shown many years ago by Dijkgraaf, Velinde, and Verlinde for two-dimensional topological conformal field theory and more recently for the non-critical String theory that some models of these two types can be solved using their connection to the special case of Frobenius manifolds—the so-called Saito Frobenius manifolds connected to a deformed singularity. The crucial point for obtaining an explicit expression for the correlators is findingthe flat coordinates of Saito Frobenius manifolds as functions of the parameters of the deformed singularity. We suggest a direct way to find the flat coordinates, using the integral representation for the solutions of the Gauss–Manin system connected to the corresponding Saito Frobenius manifold for the singularity.

Добавлено: 15 сентября 2016
Статья
Goltsman G., Tuchak A. N., Kitaeva G. et al. JETP Letters. 2012. Vol. 96. No. 2. P. 94-97.
Добавлено: 2 марта 2015
Статья
Kamashev A., Garif’yanov N., Validov A. et al. JETP Letters. 2019. Vol. 110. No. 5. P. 342-347.
Добавлено: 31 октября 2019
Статья
Volovik G., Pudalov V. M. JETP Letters. 2016. Vol. 104. No. 12. P. 888-891.

We propose potential geometry for fabrication of the graphite sheets with atomically smooth edges. For such sheets with Bernal stacking, the electron-electron interaction and topology should cause sufficiently high density of states resulting in the high temperature of either spin ordering or superconducting pairing.

Добавлено: 18 февраля 2017
Статья
Musaev E., Akhmedov E., Gahramanov I. JETP Letters. 2011. Vol. 93. No. 9. P. 545-550.
Добавлено: 20 октября 2014
Статья
Akhmedov E., Gahramanov I., Musaev E. JETP Letters. 2011. Vol. 93. No. 9. P. 603.

The Polchinski equations for the Wilsonian renormalization group in the D-dimensional matrix scalar field theory can be written at large N in a Hamiltonian form. The Hamiltonian defines evolution along one extra holographic dimension (energy scale) and can be found exactly for the subsector of Trφn (for all n) operators. We show that at low energies independently of the dimensionality D the Hamiltonian system in question reduces to the integrable effective theory. The obtained Hamiltonian system describes large wavelength KdV type (Burger-Hopf) equation with an external potential and is related to the effective theory obtained by Das and Jevicki for the matrix quantum mechanics.

Добавлено: 27 февраля 2013
Статья
Рахманов А., Kugel K., Kagan M. et al. JETP Letters. 2017. Vol. 105. No. 12. P. 806-817.

Дан краткий обзор результатов теоретического исследования электронного фазового расслоения в системах с неидеальным нестингом листов поверхности Ферми. Такие системы включают в себя хром и его сплавы, сверхпроводящие желесодержащие пниктиды, двухслойный графен и ряд других материалов.

Добавлено: 15 июня 2017
Статья
Dmitriev V. V., Soldatov A. A., Yudin A. N. JETP Letters. 2016. Vol. 103. P. 643-647.
Добавлено: 22 января 2018
Статья
Kolokolov I. JETP Letters. 2000. Vol. 72. No. 3. P. 201-204.
Добавлено: 5 марта 2017
Статья
Kolokolov I. JETP Letters. 2000. Vol. 71. No. 1. P. 12-14.
Добавлено: 5 марта 2017
Статья
Vankov A., Kukushkin I. JETP Letters. 2017. Vol. 105. No. 6. P. 380-383.

Методом комбинационного рассеяния света исследована магнитополевая динамика межподзонных коллективных возбуждений в двумерных электронных системах на основе гетероструктур Mg_xZn_{1−x}O/ZnO. Обнаружено, что при изменении спиновой поляризации в условиях перехода от фактора заполнения nu=2  к  nu=1 энергия межподзонного магнитоплазмона значительно изменяется. Проведенный теоретический анализ показал связь данного эффекта с сопутствующим изменением обменного взаимодействия в энергии возбуждения.

Добавлено: 30 ноября 2017
Статья
Maslova N., Mantsevich V., Arseyev P. JETP Letters. 2017.

We perform theoretical investigation of the localized state dynamics in the presence of interaction with the reservoir and Coulomb correlations. We analyze kinetic equations for electron occupation numbers with different spins taking into account high order correlation functions for the localized electrons. We reveal that in the stationary state electron occupation numbers with the opposite spins always have the same value - the stationary state is a “paramagnetic” one. “Magnetic” properties can appear only in the non-stationary characteristics of the single-impurity Anderson model and in the dynamics of the localized electrons second order correlation functions. We found, that for deep energy levels and strong Coulomb correlations, relaxation time for initial “magnetic” state can be several orders larger than for “paramagnetic” one. So, long-living “magnetic” moment can exist in the system. We also found non-stationary spin polarized currents flowing in opposite directions for the different spins in the particular time interval.

Добавлено: 13 апреля 2017
Статья
Tikhonov A. M., Asadchikov V. E., Volkov Y. O. et al. JETP Letters. 2016. Vol. 104. No. 12. P. 873-879.
Добавлено: 13 апреля 2017
Статья
Galkina E., Lerman L., Zaspel C. et al. JETP Letters. 2019. Vol. 110. No. 7. P. 481-486.
Добавлено: 12 марта 2020
Статья
Lunkin A., Tikhonov K., Feigelman M. JETP Letters. 2016. Vol. 103. No. 2. P. 117-121.
Добавлено: 22 ноября 2018
Статья
Makarov A. A., Yudson V. JETP Letters. 2017. Vol. 105. No. 3. P. 205-209.

A method is proposed for the creation of an entangled metastable (subradiance) excited state in a system of two closely spaced identical atoms. The system of unexcited atoms is first placed in a magnetic field that is directed at a magic angle of α0=arccos(1/3–√)≈54.7∘α0=arccos(1/3)≈54.7∘ to the line connecting the atoms and has a transverse gradient. The gradient of the field results in the detuning of frequencies of an optical transition of the atoms. Then, the resonant laser excitation of an atom with a higher transition frequency is performed with the subsequent adiabatic switching-off of the gradient of the magnetic field. It is shown that the excited atomic system in this case transits with overwhelming probability to an entangled subradiance state. Requirements on the spectroscopic parameters of the transitions and on the rate of varying the gradient of the magnetic field necessary for the implementation of this effect are analyzed.

Original Russian Text © A.A. Makarov, V.I. Yudson, 2017, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2017, Vol. 105, No. 3, pp. 193–197.

 

Добавлено: 8 июня 2017
Статья
Demishev S. V., Samarin A., Huang J. et al. JETP Letters. 2016. Vol. 104. No. 2. P. 116-123.

Magnetic properties of single crystals of Mn1−xFexSi solid solutions with x < 0.2 are investigated by pulsed field technique in magnetic fields up to 50 T. It is shown that magnetization of Mn1−xFexSi in the paramagnetic phase follows power law M(B) ~ Bα with the exponents α ∼ 0.33 − 0.5, which starts above characteristic fields Bc ∼ 1.5−7 T depending on the sample composition and lasts up to highest used magnetic field. Analysis of magnetization data including SQUID measurements in magnetic fields below 5T suggests that this anomalous behavior may be likely attributed to the formation of a field-induced Griffiths phase in the presence of spin-polaron effects.

Добавлено: 15 сентября 2016
Статья
Godunov S., Rozanov A., M.I.Vysotsky et al. JETP Letters. 2016. Vol. 103. No. 9. P. 557-562.
Добавлено: 25 января 2018
Статья
Dmitriev V. V., Kutuzov M. S., Soldatov A. A. et al. JETP Letters. 2018. Vol. 108. No. 12. P. 827-828.
Добавлено: 23 ноября 2018
Статья
Piatrusha S., Ginzburg L., Tikhonov E. et al. JETP Letters. 2018. Vol. 108. No. 1. P. 71-83.
Добавлено: 1 февраля 2019