{"title":"各向异性暗能量与广义混合膨胀定律的相互作用","authors":"Md Khurshid Alam, S. S. Singh, L. Devi","doi":"10.1155/2022/5820222","DOIUrl":null,"url":null,"abstract":"<jats:p>Interaction of dark energy in the anisotropic locally rotationally symmetric (LRS) Bianchi type-I metric is investigated in the context of modified <jats:inline-formula>\n <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M1\">\n <mi>f</mi>\n <mfenced open=\"(\" close=\")\">\n <mrow>\n <mi>R</mi>\n <mo>,</mo>\n <mi>T</mi>\n </mrow>\n </mfenced>\n </math>\n </jats:inline-formula> theory of gravity, where <jats:inline-formula>\n <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M2\">\n <mi>R</mi>\n </math>\n </jats:inline-formula> is the Ricci scalar and <jats:inline-formula>\n <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M3\">\n <mi>T</mi>\n </math>\n </jats:inline-formula> is the trace of stress energy momentum tensor. We choose the particular form of the functional <jats:inline-formula>\n <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M4\">\n <mi>f</mi>\n <mfenced open=\"(\" close=\")\">\n <mrow>\n <mi>R</mi>\n <mo>,</mo>\n <mi>T</mi>\n </mrow>\n </mfenced>\n <mo>=</mo>\n <msub>\n <mrow>\n <mi>f</mi>\n </mrow>\n <mrow>\n <mn>1</mn>\n </mrow>\n </msub>\n <mfenced open=\"(\" close=\")\">\n <mrow>\n <mi>R</mi>\n </mrow>\n </mfenced>\n <mo>+</mo>\n <msub>\n <mrow>\n <mi>f</mi>\n </mrow>\n <mrow>\n <mn>2</mn>\n </mrow>\n </msub>\n <mfenced open=\"(\" close=\")\">\n <mrow>\n <mi>T</mi>\n </mrow>\n </mfenced>\n </math>\n </jats:inline-formula>; then, we find the exact solutions of the field equations by applying inhomogeneous equation of state, <jats:inline-formula>\n <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M5\">\n <mi>p</mi>\n <mo>=</mo>\n <mi>ω</mi>\n <mi>ρ</mi>\n <mo>−</mo>\n <mi>Λ</mi>\n <mfenced open=\"(\" close=\")\">\n <mrow>\n <mi>t</mi>\n </mrow>\n </mfenced>\n </math>\n </jats:inline-formula>, and a generalized form of hybrid expansion law. The transition of deceleration to acceleration is observed in this model. It is also observed that the universe shows accelerated expansion at late epoch. The derived model overlaps with <jats:inline-formula>\n <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M6\">\n <mi>Λ</mi>\n <mtext>CDM</mtext>\n </math>\n </jats:inline-formula> at late time which is in agreement with present observation. Energy conditions of the derived model are also investigated. From the plot, we observe the age of universe <jats:inline-formula>\n <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M7\">\n <mfenced open=\"(\" close=\")\">\n <mrow>\n <msub>\n <mrow>\n <mi>t</mi>\n </mrow>\n <mrow>\n <mn>0</mn>\n </mrow>\n </msub>\n <mo>≈</mo>\n <mn>13.821</mn>\n <mtext> </mtext>\n <mtext>Gyr</mtext>\n </mrow>\n </mfenced>\n </math>\n </jats:inline-formula> for the observed <jats:inline-formula>\n <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M8\">\n <msub>\n <mrow>\n <mi>H</mi>\n </mrow>\n <mrow>\n <mn>0</mn>\n </mrow>\n </msub>\n <mo>≈</mo>\n <mn>70.07</mn>\n <mtext> </mtext>\n <msup>\n <mrow>\n <mtext>Kms</mtext>\n </mrow>\n <mrow>\n <mo>‐</mo>\n <mn>1</mn>\n </mrow>\n </msup>\n <msup>\n <mrow>\n <mtext>Mpc</mtext>\n </mrow>\n <mrow>\n <mo>‐</mo>\n <mn>1</mn>\n </mrow>\n </msup>\n </math>\n </jats:inline-formula>. The physical and geometrical behaviours of these models are also discussed.</jats:p>","PeriodicalId":7498,"journal":{"name":"Advances in High Energy Physics","volume":" ","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Interaction of Anisotropic Dark Energy with Generalized Hybrid Expansion Law\",\"authors\":\"Md Khurshid Alam, S. S. Singh, L. Devi\",\"doi\":\"10.1155/2022/5820222\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<jats:p>Interaction of dark energy in the anisotropic locally rotationally symmetric (LRS) Bianchi type-I metric is investigated in the context of modified <jats:inline-formula>\\n <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\" id=\\\"M1\\\">\\n <mi>f</mi>\\n <mfenced open=\\\"(\\\" close=\\\")\\\">\\n <mrow>\\n <mi>R</mi>\\n <mo>,</mo>\\n <mi>T</mi>\\n </mrow>\\n </mfenced>\\n </math>\\n </jats:inline-formula> theory of gravity, where <jats:inline-formula>\\n <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\" id=\\\"M2\\\">\\n <mi>R</mi>\\n </math>\\n </jats:inline-formula> is the Ricci scalar and <jats:inline-formula>\\n <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\" id=\\\"M3\\\">\\n <mi>T</mi>\\n </math>\\n </jats:inline-formula> is the trace of stress energy momentum tensor. We choose the particular form of the functional <jats:inline-formula>\\n <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\" id=\\\"M4\\\">\\n <mi>f</mi>\\n <mfenced open=\\\"(\\\" close=\\\")\\\">\\n <mrow>\\n <mi>R</mi>\\n <mo>,</mo>\\n <mi>T</mi>\\n </mrow>\\n </mfenced>\\n <mo>=</mo>\\n <msub>\\n <mrow>\\n <mi>f</mi>\\n </mrow>\\n <mrow>\\n <mn>1</mn>\\n </mrow>\\n </msub>\\n <mfenced open=\\\"(\\\" close=\\\")\\\">\\n <mrow>\\n <mi>R</mi>\\n </mrow>\\n </mfenced>\\n <mo>+</mo>\\n <msub>\\n <mrow>\\n <mi>f</mi>\\n </mrow>\\n <mrow>\\n <mn>2</mn>\\n </mrow>\\n </msub>\\n <mfenced open=\\\"(\\\" close=\\\")\\\">\\n <mrow>\\n <mi>T</mi>\\n </mrow>\\n </mfenced>\\n </math>\\n </jats:inline-formula>; then, we find the exact solutions of the field equations by applying inhomogeneous equation of state, <jats:inline-formula>\\n <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\" id=\\\"M5\\\">\\n <mi>p</mi>\\n <mo>=</mo>\\n <mi>ω</mi>\\n <mi>ρ</mi>\\n <mo>−</mo>\\n <mi>Λ</mi>\\n <mfenced open=\\\"(\\\" close=\\\")\\\">\\n <mrow>\\n <mi>t</mi>\\n </mrow>\\n </mfenced>\\n </math>\\n </jats:inline-formula>, and a generalized form of hybrid expansion law. The transition of deceleration to acceleration is observed in this model. It is also observed that the universe shows accelerated expansion at late epoch. The derived model overlaps with <jats:inline-formula>\\n <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\" id=\\\"M6\\\">\\n <mi>Λ</mi>\\n <mtext>CDM</mtext>\\n </math>\\n </jats:inline-formula> at late time which is in agreement with present observation. Energy conditions of the derived model are also investigated. From the plot, we observe the age of universe <jats:inline-formula>\\n <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\" id=\\\"M7\\\">\\n <mfenced open=\\\"(\\\" close=\\\")\\\">\\n <mrow>\\n <msub>\\n <mrow>\\n <mi>t</mi>\\n </mrow>\\n <mrow>\\n <mn>0</mn>\\n </mrow>\\n </msub>\\n <mo>≈</mo>\\n <mn>13.821</mn>\\n <mtext> </mtext>\\n <mtext>Gyr</mtext>\\n </mrow>\\n </mfenced>\\n </math>\\n </jats:inline-formula> for the observed <jats:inline-formula>\\n <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\" id=\\\"M8\\\">\\n <msub>\\n <mrow>\\n <mi>H</mi>\\n </mrow>\\n <mrow>\\n <mn>0</mn>\\n </mrow>\\n </msub>\\n <mo>≈</mo>\\n <mn>70.07</mn>\\n <mtext> </mtext>\\n <msup>\\n <mrow>\\n <mtext>Kms</mtext>\\n </mrow>\\n <mrow>\\n <mo>‐</mo>\\n <mn>1</mn>\\n </mrow>\\n </msup>\\n <msup>\\n <mrow>\\n <mtext>Mpc</mtext>\\n </mrow>\\n <mrow>\\n <mo>‐</mo>\\n <mn>1</mn>\\n </mrow>\\n </msup>\\n </math>\\n </jats:inline-formula>. The physical and geometrical behaviours of these models are also discussed.</jats:p>\",\"PeriodicalId\":7498,\"journal\":{\"name\":\"Advances in High Energy Physics\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":1.5000,\"publicationDate\":\"2021-12-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advances in High Energy Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1155/2022/5820222\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHYSICS, PARTICLES & FIELDS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in High Energy Physics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1155/2022/5820222","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, PARTICLES & FIELDS","Score":null,"Total":0}
Interaction of Anisotropic Dark Energy with Generalized Hybrid Expansion Law
Interaction of dark energy in the anisotropic locally rotationally symmetric (LRS) Bianchi type-I metric is investigated in the context of modified theory of gravity, where is the Ricci scalar and is the trace of stress energy momentum tensor. We choose the particular form of the functional ; then, we find the exact solutions of the field equations by applying inhomogeneous equation of state, , and a generalized form of hybrid expansion law. The transition of deceleration to acceleration is observed in this model. It is also observed that the universe shows accelerated expansion at late epoch. The derived model overlaps with at late time which is in agreement with present observation. Energy conditions of the derived model are also investigated. From the plot, we observe the age of universe for the observed . The physical and geometrical behaviours of these models are also discussed.
期刊介绍:
Advances in High Energy Physics publishes the results of theoretical and experimental research on the nature of, and interaction between, energy and matter. Considering both original research and focussed review articles, the journal welcomes submissions from small research groups and large consortia alike.