Fluctuation dynamics near the QCD critical point
© 2020 American Physical Society. The evolution of nonhydrodynamic slow processes near the QCD critical point is explored with the novel hydro+ framework, which extends the conventional hydrodynamic description by coupling it to additional explicitly evolving slow modes describing long wavelength f...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society (APS)
2022
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| Online Access: | https://hdl.handle.net/1721.1/142198 |
| _version_ | 1811071217778556928 |
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| author | Du, Lipei Heinz, Ulrich Rajagopal, Krishna Yin, Yi |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Du, Lipei Heinz, Ulrich Rajagopal, Krishna Yin, Yi |
| author_sort | Du, Lipei |
| collection | MIT |
| description | © 2020 American Physical Society. The evolution of nonhydrodynamic slow processes near the QCD critical point is explored with the novel hydro+ framework, which extends the conventional hydrodynamic description by coupling it to additional explicitly evolving slow modes describing long wavelength fluctuations. Their slow relaxation is controlled by critical behavior of the correlation length and is independent from gradients of matter density and pressure that control the evolution of the hydrodynamic quantities. In this exploratory study, we follow the evolution of the slow modes on top of a simplified QCD matter background, allowing us to clearly distinguish and study, both separately and in combination, the main effects controlling the dynamics of critical slow modes. In particular, we show how the evolution of the slow modes depends on their wave number, the expansion of and advection by the fluid background, and the behavior of the correlation length. Nonequilibrium contributions from the slow modes to bulk matter properties that affect the bulk dynamics (entropy, pressure, temperature, and chemical potential) are discussed and found to be small. |
| first_indexed | 2024-09-23T08:47:46Z |
| format | Article |
| id | mit-1721.1/142198 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:47:46Z |
| publishDate | 2022 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1421982023-07-10T18:42:04Z Fluctuation dynamics near the QCD critical point Du, Lipei Heinz, Ulrich Rajagopal, Krishna Yin, Yi Massachusetts Institute of Technology. Center for Theoretical Physics © 2020 American Physical Society. The evolution of nonhydrodynamic slow processes near the QCD critical point is explored with the novel hydro+ framework, which extends the conventional hydrodynamic description by coupling it to additional explicitly evolving slow modes describing long wavelength fluctuations. Their slow relaxation is controlled by critical behavior of the correlation length and is independent from gradients of matter density and pressure that control the evolution of the hydrodynamic quantities. In this exploratory study, we follow the evolution of the slow modes on top of a simplified QCD matter background, allowing us to clearly distinguish and study, both separately and in combination, the main effects controlling the dynamics of critical slow modes. In particular, we show how the evolution of the slow modes depends on their wave number, the expansion of and advection by the fluid background, and the behavior of the correlation length. Nonequilibrium contributions from the slow modes to bulk matter properties that affect the bulk dynamics (entropy, pressure, temperature, and chemical potential) are discussed and found to be small. 2022-04-29T15:40:26Z 2022-04-29T15:40:26Z 2020 2022-04-29T15:31:27Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142198 Du, Lipei, Heinz, Ulrich, Rajagopal, Krishna and Yin, Yi. 2020. "Fluctuation dynamics near the QCD critical point." Physical Review C, 102 (5). en 10.1103/PHYSREVC.102.054911 Physical Review C Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | Du, Lipei Heinz, Ulrich Rajagopal, Krishna Yin, Yi Fluctuation dynamics near the QCD critical point |
| title | Fluctuation dynamics near the QCD critical point |
| title_full | Fluctuation dynamics near the QCD critical point |
| title_fullStr | Fluctuation dynamics near the QCD critical point |
| title_full_unstemmed | Fluctuation dynamics near the QCD critical point |
| title_short | Fluctuation dynamics near the QCD critical point |
| title_sort | fluctuation dynamics near the qcd critical point |
| url | https://hdl.handle.net/1721.1/142198 |
| work_keys_str_mv | AT dulipei fluctuationdynamicsneartheqcdcriticalpoint AT heinzulrich fluctuationdynamicsneartheqcdcriticalpoint AT rajagopalkrishna fluctuationdynamicsneartheqcdcriticalpoint AT yinyi fluctuationdynamicsneartheqcdcriticalpoint |