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Bulgakov, E. N.
Giant optical vortex in photonic crystal waveguide with nonlinear optical cavity / E. N. Bulgakov, A. F. Sadreev // Phys. Rev. B. - 2012. - Vol. 85, Is. 16. - Ст. 165305, DOI 10.1103/PhysRevB.85.165305. - Cited References: 43. - The work is partially supported by RFBR grant 12-02-00483. We thank D. N. Maksimov and K. N. Pichugin for assistance in the manuscript preparation. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
SYMMETRY-BREAKING
   FIBER
   MICROCAVITIES
   COUPLER
   INSTABILITIES
   GRATINGS
   MODES
   LIGHT
Аннотация: We consider light transmission in a directional photonic crystal waveguide that holds a nonlinear defect with two resonant dipole modes within the light propagation band. For the defect positioned on the center line of the waveguide, there are two ways to break the mirror symmetry with respect to either light intensity or light phase. The latter results in a giant vortex of the Poynting vector of the power current within the defect exceeding the input current by, at least, two orders of magnitude. We also consider the breaking of symmetry relative to the mirror reflection with respect to the cross-sectional axis of the waveguide when light is injected equally into both ends of the waveguide. This leads to different light outputs determined by the vorticity of the optical vortex.

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Держатели документа:
[Bulgakov, Evgeny N.
Sadreev, Almas F.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Bulgakov, Evgeny N.] Sibian State Aerosp Univ, Krasnoyarsk, Russia

Доп.точки доступа:
Sadreev, A. F.; Садреев, Алмаз Фаттахович; Булгаков, Евгений Николаевич
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Nucleation in finite topological systems during continuous metastable quantum phase transitions / O. Fialko [et al.] // Phys. Rev. Lett. - 2012. - Vol. 108, Is. 25. - Ст. 250402, DOI 10.1103/PhysRevLett.108.250402. - Cited References: 31. - We acknowledge stimulating discussions with Jean-Sebastien Caux and Lincoln Carr. A. K. thanks Massey University for hospitality. O. F., M. C. D., and J. B. were supported by the Marsden Fund (Contract No. MAU0910) administrated by the Royal Society of New Zealand. . - ISSN 0031-9007

РУБ Physics, Multidisciplinary
Рубрики:
SYMMETRY-BREAKING
   VORTEX NUCLEATION
   BROKEN SYMMETRY
   THERMALIZATION
   SUPERFLUID
   DYNAMICS
   STATE
Аннотация: Finite topological quantum systems can undergo continuous metastable quantum phase transitions to change their topological nature. Here we show how to nucleate the transition between ring currents and dark soliton states in a toroidally trapped Bose-Einstein condensate. An adiabatic passage to wind and unwind its phase is achieved by explicit global breaking of the rotational symmetry. This could be realized with current experimental technology.

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Держатели документа:
[Fialko, Oleksandr
Delattre, Marie-Coralie
Brand, Joachim] Massey Univ, Ctr Theoret Chem & Phys, Auckland 0745, New Zealand
[Fialko, Oleksandr
Delattre, Marie-Coralie
Brand, Joachim] Massey Univ, New Zealand Inst Adv Study, Auckland 0745, New Zealand
[Kolovsky, Andrey R.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Kolovsky, Andrey R.] Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Fialko, O.; Delattre, M.C.; Brand, J.; Kolovsky, A. R.; Коловский, Андрей Радиевич
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Fractional and unquantized dc voltage generation in THz-driven semiconductor superlattices / K. N. Alekseev [et al.] // Europhys. Lett. - 2001. - Vol. 56, Is. 6. - P. 842-848, DOI 10.1209/epl/i2001-00596-9. - Cited References: 40 . - ISSN 0295-5075

РУБ Physics, Multidisciplinary
Рубрики:
BLOCH OSCILLATIONS
   SYMMETRY-BREAKING
   ELECTRIC-FIELD
   FREQUENCY
   TRANSPORT
   CHAOS
   RESONANCES
   RADIATION
Аннотация: We consider the spontaneous creation of a dc voltage across a strongly coupled semiconductor superlattice subjected to THz radiation. We show that the dc voltage may be approximately proportional either to an integer or to a half-integer multiple of the frequency of the applied ac field, depending on the ratio of the characteristic scattering rates of conducting electrons. For the case of an ac field frequency less than the characteristic scattering rates, we demonstrate the generation of an unquantized dc voltage.

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Держатели документа:
Univ Oulu, Dept Phys Sci, Div Theoret Phys, FIN-90014 Oulu, Finland
LV Kirenskii Inst Phys, Theory Nonlinear Proc Lab, Krasnoyarsk 660036, Russia
Univ Notre Dame, Dept Elect Engn, Notre Dame, IN 46556 USA
Univ Loughborough, Dept Phys, Loughborough LE11 3TU, Leics, England
Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA
Boston Univ, Dept Phys, Boston, MA 02215 USA
ИФ СО РАН
Theor. of Nonlinear Processes Lab., Kirensky Institute of Physics, Krasnoyarsk 660036, Russian Federation
Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556, United States
Department of Physics, Loughborough University, Loughborough, LE11 3TU, United Kingdom
Depts. of Elec. and Comp. E., Boston University, Boston, MA 02215, United States

Доп.точки доступа:
Alekseev, K. N.; Cannon, E. H.; Kusmartsev, F. V.; Campbell, D. K.
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Core-hole localization and ultra-fast dissociation in SF6 / V. Ekholm, G. S. Chiuzbaian, C. Sathe [et al.] // J. Phys. B. - 2020. - Vol. 53, Is. 18. - Ст. 185101, DOI 10.1088/1361-6455/aba204. - Cited References: 36. - This work was supported by the Swedish Research Council (VR). The calculations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC). FG acknowledges support within the Russian Science Foundation (Project No. 16-12-10109) . - ISSN 0953-4075. - ISSN 1361-6455

РУБ Optics + Physics, Atomic, Molecular & Chemical
Рубрики:
X-RAY-EMISSION
   SYMMETRY-BREAKING
   AB-INITIO
   SPECTROSCOPY
   SPECTRA
Кл.слова (ненормированные):
SF6 -- resonant inelastic x-ray scattering -- symmetry selection rules -- ultrafast dynamics -- vibronic couplings
Аннотация: Resonant inelastic x-ray scattering spectra excited at the fluorine K resonances of SF6 have been recorded. While a small but significant propensity for electronically parity-allowed transitions is found, the observation of parity-forbidden electronic transitions is attributed to vibronic coupling that breaks the global inversion symmetry of the electronic wavefunction and localizes the core hole. The dependence of the scattering cross section on the polarization of the incident radiation and the scattering angle is interpreted in terms of local π/σ symmetry around the S–F bond. This symmetry selectivity prevails during the dissociation that occurs during the scattering process.

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Держатели документа:
Lund Univ, MAX IV Lab, Box 118, SE-22100 Lund, Sweden.
Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden.
Sorbonne Univ, F-75005 Paris, France.
CNRS, LCPMR, F-75005 Paris, France.
Synchrotron SOLEIL, LOrme Merisiers, BP 48, F-91192 Gif Sur Yvette, France.
Ctr Nacl Pesquisa Energia & Mat CNPEM, BR-10000 Campinas, Brazil.
Royal Inst Technol, Sch Biotechnol, Theoret Chem & Biol, S-10691 Stockholm, Sweden.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden.

Доп.точки доступа:
Ekholm, V.; Chiuzbaian, G. S.; Sathe, C.; Nicolaou, A.; Guarise, M.; Simon, M.; Jaouen, N.; Luning, J.; Hague, C. F.; Gel'mukhanov, F.; Гельмуханов, Фарис Хафизович; Odelius, M.; Bjorneholm, O.; Rubensson, J-E; Swedish Research Council (VR)Swedish Research Council; Russian Science FoundationRussian Science Foundation (RSF) [16-12-10109]
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