Extended tachyon field, Chaplygin gas, and solvable k-essence cosmologies
We investigate a flat Friedmann-Robertson-Walker spacetime filled with k essence and find the set of functions F that generate three different families of extended tachyon fields and Chaplygin gases. They lead to accelerated and superaccelerated expanding scenarios. For any function F, we find the f...
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2004
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| LEADER | 08676caa a22011177a 4500 | ||
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| 001 | PAPER-16710 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518204744.0 | ||
| 008 | 190411s2004 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-85039590374 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Chimento, L.P. | |
| 245 | 1 | 0 | |a Extended tachyon field, Chaplygin gas, and solvable k-essence cosmologies |
| 260 | |c 2004 | ||
| 270 | 1 | 0 | |m Chimento, L.P.; Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, Buenos Aires, 1428, Argentina; email: chimento@df.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a We investigate a flat Friedmann-Robertson-Walker spacetime filled with k essence and find the set of functions F that generate three different families of extended tachyon fields and Chaplygin gases. They lead to accelerated and superaccelerated expanding scenarios. For any function F, we find the first integral of the k-field equation when the k field is driven by an inverse square potential or by a constant one. In the former, we obtain the general solution of the coupled Einstein–k-field equations for a linear function F. This model shares the same kinematics of the background geometry with the ordinary scalar field one driven by an exponential potential. However, they are dynamically different. For a constant potential, we introduce a k-field model that exhibits a transition from a power-law phase to a de Sitter stage, inducing a modified Chaplygin gas. © 2004 The American Physical Society. |l eng | |
| 593 | |a Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, Buenos Aires, 1428, Argentina | ||
| 773 | 0 | |d 2004 |g v. 69 |k n. 12 |p Phys Rev D Part Fields Gravit Cosmol |x 15507998 |t Physical Review D - Particles, Fields, Gravitation and Cosmology | |
| 856 | 4 | 1 | |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-85039590374&doi=10.1103%2fPhysRevD.69.123517&partnerID=40&md5=8c97f3c33b6a5af6fbfa64b3478fba9f |y Registro en Scopus |
| 856 | 4 | 0 | |u https://doi.org/10.1103/PhysRevD.69.123517 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_15507998_v69_n12_p_Chimento |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v69_n12_p_Chimento |y Registro en la Biblioteca Digital |
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