Publications by I. O. Vakarchuk

  1. G. Panochko, V. S. Pastukhov, I. O. Vakarchuk
    Impurity self-energy in the strongly-correlated Bose systems
    Int. J. Mod. Phys. B 32, No. 5, 1850053 [9 p.] (2018)
    [abs]
  2. G. Panochko, V. S. Pastukhov, I. O. Vakarchuk
    Behavior of the impurity atom in a weakly-interacting Bose gas
    Condens. Matter Phys. 20, No. 1, 13604 [11 p.] (2017)
    [abs]
  3. I. O. Vakarchuk, G. Panochko
    The effective mass of an impurity atom in the Bose liquid with a deformed Heisenberg algebra
    Ukr. J. Phys. 62, No. 2, 123-131 (2017)
    [abs]
  4. I. O. Vakarchuk, G. I. Panochko, V. S. Pastukhov
    Path-integrals method in the Bose-polaron problem
    Visnyk Lviv Univ. Ser. Phys. 52, 17-27 (2016)
  5. I. O. Vakarchuk, O. I. Hryhorchak, V. S. Pastukhov, R. O. Prytula
    Effective mass of 4He atom in superfluid and normal phases
    Ukr. J. Phys. 61, No. 1, 29-37 (2016)
  6. I. O. Vakarchuk, O. I. Hryhorchak
    Structure functions of many-boson system with regard for direct three- and four-particle correlations
    Ukr. J. Phys. 60, No. 11, 1115-1125 (2015)
  7. I. O. Vakarchuk, G. I. Panochko
    Theory of a many-boson system with deformed Heisenberg algebra
    Condens. Matter Phys. 18, No. 3, Art. 33002 (2015)
    [abs]
  8. I. O. Vakarchuk, O. I. Hryhorchak
    Internal energy of the many-boson system with three- and four-particle direct correlations taken into account
    J. Phys. Stud. 19, No. 1/2, 1005 [14 p.] (2015)
  9. I. O. Vakarchuk, Iu. M. Diakiv
    Differential cross-section of the photoelectric effect in the deformed electromagnetic field
    J. Phys. Stud. 18, No. 2/3, 2004 [5 p.] (2014)
  10. I. O. Vakarchuk
    Five stories on astronomy and physics
    Svit Fizyky (World of Physics) No. 1, 3-8 (2014)
  11. I. O. Vakarchuk, V. S. Pastukhov, R. O. Prytula
    Theory of structure and thermodynamic function of liquid 4He (Review Article)
    Fiz. Nizk. Temp. 39, No. 9, 958-969 (2013)
    [Low Temp. Phys. 39, 741-751 (2013)]
  12. I. O. Vakarchuk, V. S. Pastukhov, R. O. Prytula
    Theory of heat capacity of liquid helium-4 for temperatures above the critical point
    Ukr. Phys. J. 57, No. 12, 1214-1222 (2012)
  13. I. O. Vakarchuk, G. I. Panochko
    Impurity states in a many-boson system
    J. Phys. Stud. 16, No. 4, 4601 [8 p.] (2012)
  14. I. O. Vakarchuk, V. S. Pastukhov
    Random phase approximation for Bose systems above the temperature of phase transition
    J. Phys. Stud. 15, No. 3, 3003 [7 p.] (2011)
  15. I. O. Vakarchuk, O. I. Hryhorchak
    Partition function of many-boson system with direct three- and four-particle correlations taken into account
    Visnyk Lviv Univ. Ser. Fiz. 46, 3-48 (2011)
  16. I. O. Vakarchuk,
    On the correspondence between classical physical quantities and quantum mechanical operators
    J. Phys. Stud. 15, 3, 3998(1-8) (2011)
  17. I. O. Vakarchuk
    Deformed Heisenberg algebra in the theory of liquid 4He
    Ukr. J. Phys. 55, No. 1, 36-43 (2010)
  18. I. O. Vakarchuk
    Mirror
    in: Philosophical Problems of Science: Lviv-Warsaw Seminar 14-22 (2010)
  19. I. O. Vakarchuk
    "Divine proportion"
    in: Philosophical Problems of Science: Lviv-Warsaw Seminar 84-87 (2010)
  20. I. O. Vakarchuk, O. I. Hryhorchak
    Density matrix of the many-boson system with the consideration of three- and four-particle direct correlations
    J. Phys. Stud. 13, No. 3, 3004 [28 p.] (2009)
  21. I. O. Vakarchuk, R. O. Prytula
    Temperature dependence of the pair distribution function of the liquid 4He
    J. Phys. Stud. 13, No. 2, 2003 [5 p.] (2009)
  22. I. O. Vakarchuk, R. O. Prytula
    One-particle density matrix of liquid 4He in the pair correlation approximation
    Ukr. Fiz. Zh. 54, No. 7, 687-696 (2009)
    [Ukr J. Phys. 54, 686-695 (2009)]
  23. I. O. Wakarczuk
    Boska proporcja
    Przegląd Uniwersytecki: Pismo informacyjne Uniwersytetu Wrocławskiego Nr 11 (162), 8-9 (2009)
  24. I. O. Vakarchuk, R. O. Prytula
    Structure functions of liquid helium-4 with three- and four-particle indirect correlation taken into consideration
    J. Phys. Stud. 12, No 4, 4001 [12 p.] (2008) (in Ukrainian)
  25. I. O. Vakarchuk
    Casimir energy for the field with deformed Poisson brackets
    Physical collection of Shevchenko Sci. Soc. 7, 369-376 (2008) (in Ukrainian)
  26. I. O. Vakarchuk, V. S. Pastukhov
    Bose-condensate in two-component Bose-liquid
    J. Phys. Stud. 12, No 3, 3002 [8 p.] (2008) (in Ukrainian)
  27. I. O. Vakarchuk
    Theory of radiation and absorption of deformed field quanta
    Condens. Matter Phys. 11, No. 3(55), 409-416 (2008)
  28. I. O. Vakarchuk
    The Casimir effect in a deformed field
    J. Phys. A: Math. Theor. 41, No. 18, 185402 [10 p.] (2008)
  29. I. O. Vakarchuk, V. S. Pastukhov
    Density matrix of binary Bose-liquid in the approximation of pair correlations
    J. Phys. Stud. 12, No 1, 1001 [5 p.] (2008) (in Ukrainian)
  30. T. V. Fityo, I. O. Vakarchuk, V. M. Tkachuk
    The WKB approximation in the deformed space with the minimal length and minimal momentum
    J. Phys. A: Math. Theor. 41, No. 4, 045305 [6 p.] (2008)
  31. I. A. Vakarchuk
    One-particle density matrix of liquid 4He
    Teor. Mat. Fiz. 154, No. 1, 9-30 (2008) (in Russian)
    [Theor. Math. Phys. 154, 6-25 (2008)]
  32. I. O. Vakarchuk
    Philosophical aspects of the general relativity theory
    Filozoficzne problemy nauki (Lviv; Warszawa: Wydawnictwo Naukowe Semper) 73-90 (2008) (in Ukrainian)
  33. I. O. Vakarchuk
    Schrödinger's cat and the problem of two cultures
    Filozoficzne problemy nauki (Lviv; Warszawa: Wydawnictwo Naukowe Semper) 182-185 (2008) (in Ukrainian)
  34. I. O. Vakarchuk
    Memory and recurrence events
    Filozoficzne problemy nauki (Lviv; Warszawa: Wydawnictwo Naukowe Semper) 343-344 (2008) (in Ukrainian)
  35. I. O. Vakarchuk
    Higher education in Ukraine — European dimension: status, problems, prospects
    Vyshcha shkola 3, 3-18 (2008) (in Ukrainian)
  36. A. A. Rovenchak, I. O. Vakarchuk
    Calculation of the condensate fraction in liquid helium-4
    J. Phys. Stud. 11, No. 4, 404-407 (2007)
  37. I. O. Vakarchuk, R. O. Prytula, A. A. Rovenchak
    Kinetic energy and heat capacity of liquid 4He
    J. Phys. Stud. 11, No. 3, 259-267 (2007) (in Ukrainian)
  38. I. O. Vakarchuk
    Schrödinger's cat and the problem of two cultures
    in: Myśli o języku, nauce i wartościach: księga ofiarowana Profesorowi Jackowi Juliuszowi Jadackiemu w sześćdziesiątą rocznicę urodzin. Pod red. W. Strawińskiego, M. Grygiańca i A. Brożek (Warszawa, Wydawnictwo Naukowe Semper) 203-212 (2006)
  39. T. V. Fityo, I. O. Vakarchuk, V. M. Tkachuk
    One-dimensional Coulomb-like problem in deformed space with minimal length
    J. Phys. A: Math. Gen. 39, 2143-2149 (2006)
  40. T. V. Fityo, I. O. Vakarchuk, V. M. Tkachuk
    WKB approximation in deformed space with minimal length
    J. Phys. A: Math. Gen. 39, 379-387 (2006)
  41. I. O. Vakarchuk
    On Dirac theory in the space with deformed Heisenberg algebra: exact solutions
    J. Phys. A: Math. Gen. 38, 7567-7576 (2005)
  42. I. O. Vakarchuk
    Reply to 'Comment on 'Kepler problem in Dirac theory for a particle with position-dependent mass''
    J. Phys. A: Math. Gen. 38, 6859 (2005)
  43. I. O. Vakarchuk
    The Kepler problem in Dirac theory for a particle with position-dependent mass
    J. Phys. A: Math. Gen. 38, 4727-4734 (2005)
  44. I. O. Vakarchuk
    A self-consistent theory of liquid 4He
    J. Phys. Stud. 8, No. 3, 223-240 (2004)
  45. I. O. Vakarchuk
    Structural variants of higher education in the context of the Bologna Process
    Models of harmonization of national and international standards of education in the context of the Bologna Process: Proceedings of the International Workshop May 27-28, 2004, held at the Ibvan Franko National University of Lviv (Lviv: Litopys) 22-31 (2004 ) (in Ukrainian)
  46. I. O. Vakarchuk
    The magnetic Bose liquid
    J. Phys. Stud. 7, No. 1, 40-49 (2003)
  47. R. Lavrycky, I. O. Vakarchuk, O. M. Popel
    Physics at Lviv University before 1939
    in: Physics and Mathematics at Wroclaw University. Past and Present. Proceedings of the 17th Max Born Symposium. Wroclaw, Poland, 18-19 October 2002. Ed. by J.Lukierski and H.Rechenberg 71-76 (2003)
  48. I. O. Vakarchuk
    The 1/N-expansion in quantum mechanics. High-order approximations
    J. Phys. Stud. 6, No. 1, 46-54 (2002)
  49. I. O. Wakarczuk
    Uniwersytet a problem dwóch kultur
    Konspekt: Pismo Akademii Pedagogicznej w Krakowie Nr. 9, 5-8 (zima 2001/2002)
  50. I. O. Vakarchuk, A. A. Rovenchak
    Representation of the short-range interactions in liquid helium via modified hard sphere potentials
    J. Phys. Stud. 5, No. 2, 126-130 (2001)
  51. I. O. Vakarchuk
    Is a quantum a great guesswork or a "forced" step?
    J. Phys. Stud. 5, No. 1, 1-6 (2001)
  52. I. O. Vakarchuk, A. A. Rovenchak
    Thermodynamics of the Bose-system with a small number of particles
    Condens. Matter Phys. 4, No. 3(27), 431-447 (2001)
  53. I. O. Vakarchuk
    Theory of relativity and its creators
    Svit Fizyky (World of Physics) No. 2, 3-15 (2001) (in Ukrainian)
  54. I. O. Vakarchuk, V. V. Babin, A. A. Rovenchak
    A potential energy of interaction between helium atoms
    J. Phys. Stud. 4, 16-22 (2000)
  55. I. O. Vakarchuk
    Is a quantum a great guesswork or a "forced" step?
    Svit Fizyky (World of Physics) No. 4, 9-15 (2000)
  56. I. O. Vakarchuk, H. Shopa
    Max Karl Ernst Ludwig Planck
    Svit Fizyky (World of Physics) No. 4, 27-29 (2000)
  57. I. O. Vakarchuk, V. V. Babin
    Low-temperature asymptotic behaviour of the impurity effective mass in surerfluid 4He
    J. Phys. Stud. 3, 468-473 (1999) (in Ukrainian)
  58. I. O. Vakarchuk
    Once more on the superfluid 4He
    J. Phys. Stud. 3, 264-271 (1999)
  59. I. O. Vakarchuk
    Isaac Newton and his system of the World
    Svit Fizyky (World of Physics) 2, 11-16 (1999)
  60. I. O. Vakarchuk, V. M. Tkachuk, T. V. Kuliy
    Magnetic properties of dilute alloys: Equations for magnetization and its structural fluctuations
    Phys. Stat. Solidi (b) 208, 167-186 (1998)
  61. I. O. Vakarchuk, V. V. Babin
    Impurity effective mass in surerfluid 4He
    Condens. Matter Phys. 1, No 1(13), 161-168 (1998)
  62. I. O. Vakarchuk, V. V. Babin
    Effective mass of impurity in superfluid 4He
    Visnyk Lviv. Univ. Ser. Fiz. 31, 13-16 (1998) (in Ukrainian)
  63. I. O. Vakarchuk, R.E.Rykalyuk, L.M.Yankiv-Vitkovska
    A temperature dependence of the width of the atom spectral lines in stellar atmospheres
    J. Phys. Stud. 2, 16-22 (1998) (in Ukrainian)
  64. I. O. Vakarchuk, P.A. Hlushak, M. V. Tokarchuk
    A consistent description of kinetics and hydrodynamics of quantum Bose-systems. . Transport equation
    . . . 42, 9, 1150-1158 (1997)
  65. I. O. Vakarchuk, K. Vasylyna
    Calculation of the density matrix of liquid 4He
    Condens. Matter Phys. Iss. 9, 117-126 (1997)
  66. I. O. Vakarchuk
    New results for the distribution functions of many-particle quantum systems
    J. Phys. Stud. 1, 156-168 (1997) (in Ukrainian)
  67. I. O. Vakarchuk, P. A. Hlushak
    Calculation of thermodynamic functions of superfluid 4He at low temperatures. 1. Free energy
    Ukr. Fiz. Zhurn. 41, 569-576 (1996) (in Ukrainian)
  68. I. O. Vakarchuk
    Statistical operator of a system of identical interacting particles in coordinate representation
    J. Phys. Stud. 1, 25-38 (1996) (in Ukrainian)
  69. I. O. Vakarchuk, V. M. Tkachuk, T. V. Kuliy
    The influence of structure disorder on mean atomic momentum fluctuations and the spin-wave spectrum
    J. Magn. Magn. Matter. 146, 191-194 (1995)
  70. I. O. Vakarchuk
    Density matrix of the system of identical particles, interacting via oscillator forces
    Condens. Matter Phys. Iss. 5, 203-209 (1995)
  71. I. O. Vakarchuk, R. E. Rykalyuk, L. M. Yankiv-Vitkovska
    The calculation of contribution from post-var-der-Waals multipole interactions in the temperature dependence of the damping constant of spectral lines of atoms
    Informational Bulletin of the Ukrainian Astronomical Association 7, 86-87 (1995)
  72. I. O. Vakarchuk, V. M. Myhal, V. M. Tkachuk
    Electron-phonon interaction influence on electron and phonon excitations in amorphous metals
    Phys. Stat. Sol. (b) 185, 101-115 (1994)
  73. I. O. Vakarchuk, V. M. Tkachuk, T. V. Kuliy
    The influence of spins' structure fluctuation on the spectrum and damping of spin waves in amorphous ferromagnets
    Condens. Matter Phys. Iss. 3, 176-180 (1994)