Landau Institute for theoretical physics

Department of quantum mesoscopics

Address:
142432, Chernogolovka, Moscow region
acad. Semenov prosp., 1a
119334, Moscow
Kosygin st., 2
Phone: ++7-495-702-93-17
Fax: ++7-495-702-93-17
Phone: ++7-495-137-32-44
Fax: ++7-495-938-20-77
e-mail: qmeso@itp.ac.ru
Research topics
  • Mesoscopic electronic systems
  • Superconducting hybrid structures
  • Quantum phase transitions
  • Spintronics
  • 2DEG and quantum Hall effect
  • Quantum magnetism and topological order
  • Physics of quantum computation
Recent seminars
Department of quantum mesoscopics: seminar, Friday, September 11, 2026, ITF, 3:00 pm

Ivanov A. V. (Institut prikladnoi matematiki im. M.V.Keldysha RAN)

Uravneniya korrelyatsionnoi magnitodinamiki.

Iz atomisticheskoi modeli klassicheskogo magnetika Geizenberga pri pomoshchi tsepochki Bogolyubova i novoi approksimatsii dvukhchastichnoi funktsii raspredeleniya, uchityvayushchei obmennye korrelyatsii mezhdu blizhaishimi sosedyami, postroena novaya sistema uravnenii korrelyatsionnoi magnitodinamiki (CMD).

V otlichii ot traditsionnogo uravnenie Landau--Lifshitsa--Blokha (LLB), CMD operiruet parametrami ne tol'ko dal'nego (namagnichennost'yu) no i blizhnego poryadka (obmennoi energiei). V neravnovesnom sluchae rezul'taty CMD gorazdo luchshe soglasuyutsya s rezul'tatami iskhodnoi atomisticheskoi modeli modeli, chem rezul'taty LLB. V chastnosti, luchshe opisyvayutsya vremena relaksatsii i peremagnichivanie obraztsa. Uchet korrelyatsii mezhdu blizhaishimi sosedyami pozvolyaet rasschityvat' entropiyu klassicheskogo magnetika s tochnost'yu do vtorogo znaka kak lineinuyu kombinatsiyu entropii odno- i dvukhchastichnoi funktsii raspredeleniya.