• A
  • A
  • A
  • ABC
  • ABC
  • ABC
  • А
  • А
  • А
  • А
  • А
Regular version of the site

Drag Effect in Bose and Fermi Gases

Student: Azat Aminov

Supervisor: Yury Lozovik

Faculty: Faculty of Physics

Educational Programme: Physics (Master)

Year of Graduation: 2021

Using Feynman diagrammatic technique, unified theory of superfluid drag (Andreev-Bashkin effect) was developed for two-component Bose systems, two-layer superconducting systems and coherent electron-polariton systems consisting in a superconductor coupled with an exciton-polariton Bose condensate. Analytical formulas describing this effect were derived and numerical calculations at realistic parameters were carried out. The superfluid drag density in a two-component Bose system is shown to be bounded from above by the density of noncondensed part of each Bose component. The counterpart of dissipative Coulomb drag in a two-layer Bose system, which coexists with the superfluid drag, was also studied. As shown, the Bose stimulation effects plays the key role in a formation of drag effects in Bose-condensed systems. Methods of experimental observation of the considered effects were discussed. In particular, the method to control superconducting current using a laser radiation in electron-polariton systems was proposed.

Student Theses at HSE must be completed in accordance with the University Rules and regulations specified by each educational programme.

Summaries of all theses must be published and made freely available on the HSE website.

The full text of a thesis can be published in open access on the HSE website only if the authoring student (copyright holder) agrees, or, if the thesis was written by a team of students, if all the co-authors (copyright holders) agree. After a thesis is published on the HSE website, it obtains the status of an online publication.

Student theses are objects of copyright and their use is subject to limitations in accordance with the Russian Federation’s law on intellectual property.

In the event that a thesis is quoted or otherwise used, reference to the author’s name and the source of quotation is required.

Search all student theses