Will There Be Future Deceleration? A Study of Particle Creation Mechanism in Nonequilibrium Thermodynamics
The paper deals with nonequilibrium thermodynamics based on adiabatic particle creation mechanism with the motivation of considering it as an alternative choice to explain the recent observed accelerating phase of the universe. Using Friedmann’s equations, it is shown that the deceleration parameter...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
|
| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2015/654025 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832556059771797504 |
|---|---|
| author | Supriya Pan Subenoy Chakraborty |
| author_facet | Supriya Pan Subenoy Chakraborty |
| author_sort | Supriya Pan |
| collection | DOAJ |
| description | The paper deals with nonequilibrium thermodynamics based on adiabatic particle creation mechanism with the motivation of considering it as an alternative choice to explain the recent observed accelerating phase of the universe. Using Friedmann’s equations, it is shown that the deceleration parameter (q) can be obtained from the knowledge of the particle production rate (Γ). Motivated by thermodynamical point of view, cosmological solutions are evaluated for the particle creation rates in three cosmic phases, namely, inflation, matter dominated era, and present late time acceleration. The deceleration parameter (q) is expressed as a function of the redshift parameter (z), and its variation is presented graphically. Also, statefinder analysis has been presented graphically in three different phases of the universe. Finally, two noninteracting fluids with different particle creation rates are considered as cosmic substratum, and deceleration parameter (q) is evaluated. Whether more than one transition of q is possible or not is examined by graphical representations. |
| format | Article |
| id | doaj-art-4045da3fcc1a482a9b63f21099843ecd |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-4045da3fcc1a482a9b63f21099843ecd2025-02-03T05:46:25ZengWileyAdvances in High Energy Physics1687-73571687-73652015-01-01201510.1155/2015/654025654025Will There Be Future Deceleration? A Study of Particle Creation Mechanism in Nonequilibrium ThermodynamicsSupriya Pan0Subenoy Chakraborty1Department of Mathematics, Jadavpur University, Kolkata, West Bengal 700032, IndiaDepartment of Mathematics, Jadavpur University, Kolkata, West Bengal 700032, IndiaThe paper deals with nonequilibrium thermodynamics based on adiabatic particle creation mechanism with the motivation of considering it as an alternative choice to explain the recent observed accelerating phase of the universe. Using Friedmann’s equations, it is shown that the deceleration parameter (q) can be obtained from the knowledge of the particle production rate (Γ). Motivated by thermodynamical point of view, cosmological solutions are evaluated for the particle creation rates in three cosmic phases, namely, inflation, matter dominated era, and present late time acceleration. The deceleration parameter (q) is expressed as a function of the redshift parameter (z), and its variation is presented graphically. Also, statefinder analysis has been presented graphically in three different phases of the universe. Finally, two noninteracting fluids with different particle creation rates are considered as cosmic substratum, and deceleration parameter (q) is evaluated. Whether more than one transition of q is possible or not is examined by graphical representations.http://dx.doi.org/10.1155/2015/654025 |
| spellingShingle | Supriya Pan Subenoy Chakraborty Will There Be Future Deceleration? A Study of Particle Creation Mechanism in Nonequilibrium Thermodynamics Advances in High Energy Physics |
| title | Will There Be Future Deceleration? A Study of Particle Creation Mechanism in Nonequilibrium Thermodynamics |
| title_full | Will There Be Future Deceleration? A Study of Particle Creation Mechanism in Nonequilibrium Thermodynamics |
| title_fullStr | Will There Be Future Deceleration? A Study of Particle Creation Mechanism in Nonequilibrium Thermodynamics |
| title_full_unstemmed | Will There Be Future Deceleration? A Study of Particle Creation Mechanism in Nonequilibrium Thermodynamics |
| title_short | Will There Be Future Deceleration? A Study of Particle Creation Mechanism in Nonequilibrium Thermodynamics |
| title_sort | will there be future deceleration a study of particle creation mechanism in nonequilibrium thermodynamics |
| url | http://dx.doi.org/10.1155/2015/654025 |
| work_keys_str_mv | AT supriyapan willtherebefuturedecelerationastudyofparticlecreationmechanisminnonequilibriumthermodynamics AT subenoychakraborty willtherebefuturedecelerationastudyofparticlecreationmechanisminnonequilibriumthermodynamics |