Russian Academy of Sciences

Landau Institute for Theoretical Physics

Seminars at the Landau Institute scientific council

Seminars are held on Fridays in the conference hall of Landau Institute for Theoretical Physics in Chernogolovka, beginning at 11:30.

You can subscribe and receive announcements about ITP seminars. If you have any questions, please contact the scientific secretary Sergey Krashakov.

High order Fano-resonances and extreme effects in field localization

20 September, the day after tomorrow in 11:30

Борис Лукьянчук (МГУ & Nanyang Technological University, Singapore)

The weakly dissipating dielectric spheres (glass, quartz, etc.) permit to realize high order Fano resonances for internal Mie modes. These resonances for specific values of the size parameter yield field-intensity enhancement factors on the order of 104–107, which can be directly obtained from analytical calculations. These “super-resonances” provides magnetic nanojets with giant magnetic fields, which is attractive for many applications.

Vortex knots on three-dimensional lattices of nonlinear oscillators coupled by space-varying links

27 September in 11:30 (short)

V.P. Ruban

Quantized vortices in a complex wave field described by a defocusing nonlinear Schrödinger equation witha space-varying dispersion coefficient are studied theoretically and compared to vortices in the Gross-Pitaevskii model with external potential. A discrete variant of the equation is used to demonstrate numerically that vortex knots in three-dimensional arrays of oscillators coupled by specially tuned weak links can exist for as long times as many tens of typical vortex turnover periods. [PRE 100, 012205 (2019)].

Statistika kontaktov v modeli vypetlivaniya interfaznykh khromosom

27 September in 11:30

S. Belan (in collaboration with Mirny Lab, MIT)

Blagodarya razrabotke metoda opredeleniya konformatsii khromosom (Hi-C) stalo vozmozhnym poluchit’ predstavlenie ob organizatsii khromatina putem izmereniya chastoty fizicheskikh kontaktov mezhdu razlichnymi uchastkami genoma. Klyuchevye osobennosti kart kontaktov, poluchaemykh na osnove Hi-C dannykh, mogut byt’ ob’yasneny v ramkakh modeli vypetlivaniya, predpolagayushchei nalichie v kletke ATF-zavisimogo protsessa obrazovaniya dinamicheski rasshiryayushchikhsya petel’ khromatina. V etom doklade ya predstavlyu kratkoe vvedenie v model’ vypetlivaniya i prodemonstriruyu, chto analiticheskie predskazaniya, izvlechennye iz etoi modeli v ee prosteishem variante, gde khromatinovaya fibrilla rassmatrivaetsya kak ideal’naya gaussovskaya tsep’, soglasuyutsya s eksperimental’no izmerennoi statistikoi kontaktov v interfaznykh khromosomakh mlekopitayushchikh.

Ablyatsiya ruteniya ul’trakorotkim lazernym impul’som

27 September in 11:30 (short)

Petrov YuV, Khokhlov VA, Inogamov NA

Izucheny kharakteristiki metalla v usloviyakh vozbuzhdeniya elektronnoi podsistemy ul’trakorotkim lazernym impul’som. Sootvetstvuyushchie kharakteristiki zavedeny v modeliruyushchii kod. Issledovany rezhimy ablyatsii v zavisimosti ot pogloshchennoi energii.