Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach
We use variational approach to analyze the evolution of the dynamics of a neutral s-wave superconductor between BCS and BEC regimes. We consider 2D case, when BCS–BEC crossover occurs already at weak coupling and is governed by the ratio of the two scales — the Fermi energy EF and the bound state en...
Збережено в:
| Опубліковано в: : | Физика низких температур |
|---|---|
| Дата: | 2018 |
| Автори: | , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2018
|
| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/176148 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach / A.V. Chubukov, D. Mozyrsky // Физика низких температур. — 2018. — Т. 44, № 6. — С. 684-690. — Бібліогр.: 42 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862581650578210816 |
|---|---|
| author | Chubukov, A.V. Mozyrsky, D. |
| author_facet | Chubukov, A.V. Mozyrsky, D. |
| citation_txt | Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach / A.V. Chubukov, D. Mozyrsky // Физика низких температур. — 2018. — Т. 44, № 6. — С. 684-690. — Бібліогр.: 42 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | We use variational approach to analyze the evolution of the dynamics of a neutral s-wave superconductor between BCS and BEC regimes. We consider 2D case, when BCS–BEC crossover occurs already at weak coupling and is governed by the ratio of the two scales — the Fermi energy EF and the bound state energy for two fermions in a vacuum, E₀. BCS and BEC regimes correspond to EF >> E₀ and EF << E₀, respectively. We compute the spectrum of low-energy bosonic excitations and show that the velocity of phase fluctuations remains υF / √2 through BCS–BEC crossover. We also discuss the topological Aφ ̇ term in the effective action.
|
| first_indexed | 2025-11-26T21:41:37Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-176148 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-11-26T21:41:37Z |
| publishDate | 2018 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Chubukov, A.V. Mozyrsky, D. 2021-02-03T19:01:53Z 2021-02-03T19:01:53Z 2018 Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach / A.V. Chubukov, D. Mozyrsky // Физика низких температур. — 2018. — Т. 44, № 6. — С. 684-690. — Бібліогр.: 42 назв. — англ. 0132-6414 PACS: 74.20.Fg, 74.25.Вt, 74.78.–w https://nasplib.isofts.kiev.ua/handle/123456789/176148 We use variational approach to analyze the evolution of the dynamics of a neutral s-wave superconductor between BCS and BEC regimes. We consider 2D case, when BCS–BEC crossover occurs already at weak coupling and is governed by the ratio of the two scales — the Fermi energy EF and the bound state energy for two fermions in a vacuum, E₀. BCS and BEC regimes correspond to EF >> E₀ and EF << E₀, respectively. We compute the spectrum of low-energy bosonic excitations and show that the velocity of phase fluctuations remains υF / √2 through BCS–BEC crossover. We also discuss the topological Aφ ̇ term in the effective action. We thank I. Aleiner, J.J. Dziarmaga, I. Martin, M. Stone,
 J. Sauls, D. Solenov, and G.E. Volovik for valuable discussions. The work at Los Alamos was performed under the
 auspices of the United States Department of Energy under
 Contract DE5AC52-06NA25396 and supported by LDRD
 and BES Grant No’s. 20170460ER and E3B7, respectively.
 The work by AVC was supported by the Office of Basic
 Energy Sciences U.S. Department of Energy under award
 DE-SC0014402. AVC is thankful to KITP at UCSB, where
 part of the work has been done. KITP is supported by NSF
 grant PHY-1125915. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach Article published earlier |
| spellingShingle | Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach Chubukov, A.V. Mozyrsky, D. Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова |
| title | Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_full | Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_fullStr | Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_full_unstemmed | Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_short | Evolution of the dynamics of neutral superconductors between BCS and BEC regimes: the variational approach |
| title_sort | evolution of the dynamics of neutral superconductors between bcs and bec regimes: the variational approach |
| topic | Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова |
| topic_facet | Специальный выпуск К 90-летию со дня рождения A.A. Абрикосова |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/176148 |
| work_keys_str_mv | AT chubukovav evolutionofthedynamicsofneutralsuperconductorsbetweenbcsandbecregimesthevariationalapproach AT mozyrskyd evolutionofthedynamicsofneutralsuperconductorsbetweenbcsandbecregimesthevariationalapproach |