Issues

 / 

2017

 / 

November

  

In memory of Leonid Veniaminovich Keldysh. From the archive


Coherent states of excitons


Lebedev Physical Institute, Russian Academy of Sciences, Leninsky prosp. 53, Moscow, 119991, Russian Federation

The concept of a coherent exciton state is formulated. It is shown that for this state the macroscopic wave function may be introduced which satisfies a nonlinear equation of the type familiar in the phenomenological theory of a superfluid liquid. The corresponding nondissipative flux is the flux of energy. For excitons interacting with an electromagnetic field, a coupled system of Maxwell equations and Ginzburg—Pitaevskii (phenomenological theory of Bose liquid) type equations is obtained.

Text can be downloaded in Russian. English translation is available here.
Keywords: excitons, coherent state of excitons, macroscopic wave function, phenomenological theory of superfluid liqui, Bose-liquid equations, Ginzburg—Pitaevskii equations
PACS: 03.75.Kk, 67.10.−j, 71.35.−y (all)
DOI: 10.3367/UFNe.2017.10.038227
URL: https://ufn.ru/en/articles/2017/11/f/
Citation: Keldysh L V "Coherent states of excitons" Phys. Usp. 60 1180–1186 (2017)
BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks

Received: 12th, July 2017, 18th, October 2017

Оригинал: Келдыш Л В «Когерентные состояния экситонов» УФН 187 1273–1279 (2017); DOI: 10.3367/UFNr.2017.10.038227

© 1918–2018 Uspekhi Fizicheskikh Nauk
Email: ufn@ufn.ru Editorial office contacts About the journal Terms and conditions