تقرير
Dark Energy with a Triplet of Classical U(1) Fields
| العنوان: | Dark Energy with a Triplet of Classical U(1) Fields |
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| المؤلفون: | Tishue, Avery J., Caldwell, Robert R. |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology |
| الوصف: | We present a new mechanism for cosmic acceleration consisting of a scalar field coupled to a triplet of classical U(1) gauge fields. The gauge fields are arranged in a homogeneous, isotropic configuration, with both electric- and magnetic-like vacuum expectation values. The gauge fields provide a mass-like term via a Chern-Simons interaction that suspends the scalar away from its potential minimum, thereby enabling potential-dominated evolution. We show this mechanism can drive a brief period of acceleration, such as dark energy, without the need for fine tunings. We obtain simple analytic results for the dark energy equation of state and dependence on model parameters. In this model, the presence of the gauge field generically leads to a suppression of long-wavelength gravitational waves, with implications for the experimental search for cosmic microwave background B-modes and direct detection of a stochastic gravitational wave background. Comment: 15 pages, 6 figures, comments welcome |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.107.043514 |
| URL الوصول: | http://arxiv.org/abs/2208.11129 |
| رقم الأكسشن: | edsarx.2208.11129 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.107.043514 |
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