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Chiral density waves in the NJL_2 model with quark number and isospin chemical potentialsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Ebert D., Gubina N.V., Klimenko K.G., Kurbanov S.G., Zhukovsky V.Ch
- Журнал: Physical Review D
- Том: 84
- Номер: 2
- Год издания: 2011
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 025004-1
- Последняя страница: 025004-13
- DOI: 10.1103/PhysRevD.84.025004
- Аннотация: We investigate the phase portrait of the (1 + 1)-dimensional massless two-flavored NJL_2 model containing a quark number chemical potential and an isospin chemical potential in the limit of a large number of colors N_c. Particular attention is paid to the question of to what extent the inclusion of an isospin asymmetry affects chiral condensates to have a spatial inhomogeneity in the form of the socalled chiral density waves (CDW) (chiral spirals). It is shown that, at zero temperature and comparatively small values of \mu, i.e. at \mu<\mu_c = 0.68M_0 (M_0 is the dynamical quark mass in the vacuum), only the homogeneous charged pion condensation phase is realized for arbitrary nonzero values of \mu_I . Contrary to this, for large values of \mu>\mu_c, two CDW phases appear in the \mu_I,\mu)-phase diagram of the model. In the first phase, CDWs are clockwise twisted chiral spirals, and in the second phase they are counterclockwise. The influence of nonzero temperature on the formation of the CDWphases is also investigated.
- Добавил в систему: Жуковский Владимир Чеславович