Effects of the Quantum Vacuum at a Cosmic Scale and of Dark Energy
The Einstein equation in a semiclassical approximation is applied to a spherical region of the universe, with the stress-energy tensor consisting of the mass density and pressure of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline">...
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MDPI AG
2024-11-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/26/12/1042 |
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| author | Emilio Santos |
| author_facet | Emilio Santos |
| author_sort | Emilio Santos |
| collection | DOAJ |
| description | The Einstein equation in a semiclassical approximation is applied to a spherical region of the universe, with the stress-energy tensor consisting of the mass density and pressure of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>Λ</mi><mi>C</mi><mi>D</mi><mi>M</mi></mrow></semantics></math></inline-formula> cosmological model plus an additional contribution due to the quantum vacuum. Expanding the equation in powers of Newton constant G, the vacuum contributes to second order. The result is that at least a part of the acceleration in the expansion of the universe may be due to the quantum vacuum fluctuations. |
| format | Article |
| id | doaj-art-1fa3735501324294bd8ccaccbb20e284 |
| institution | DOAJ |
| issn | 1099-4300 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj-art-1fa3735501324294bd8ccaccbb20e2842025-08-20T02:43:29ZengMDPI AGEntropy1099-43002024-11-012612104210.3390/e26121042Effects of the Quantum Vacuum at a Cosmic Scale and of Dark EnergyEmilio Santos0Departamento de Física, Universidad de Cantabria, 39005 Santander, SpainThe Einstein equation in a semiclassical approximation is applied to a spherical region of the universe, with the stress-energy tensor consisting of the mass density and pressure of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>Λ</mi><mi>C</mi><mi>D</mi><mi>M</mi></mrow></semantics></math></inline-formula> cosmological model plus an additional contribution due to the quantum vacuum. Expanding the equation in powers of Newton constant G, the vacuum contributes to second order. The result is that at least a part of the acceleration in the expansion of the universe may be due to the quantum vacuum fluctuations.https://www.mdpi.com/1099-4300/26/12/1042dark energyquantum vacuumquantized Einstein equation |
| spellingShingle | Emilio Santos Effects of the Quantum Vacuum at a Cosmic Scale and of Dark Energy Entropy dark energy quantum vacuum quantized Einstein equation |
| title | Effects of the Quantum Vacuum at a Cosmic Scale and of Dark Energy |
| title_full | Effects of the Quantum Vacuum at a Cosmic Scale and of Dark Energy |
| title_fullStr | Effects of the Quantum Vacuum at a Cosmic Scale and of Dark Energy |
| title_full_unstemmed | Effects of the Quantum Vacuum at a Cosmic Scale and of Dark Energy |
| title_short | Effects of the Quantum Vacuum at a Cosmic Scale and of Dark Energy |
| title_sort | effects of the quantum vacuum at a cosmic scale and of dark energy |
| topic | dark energy quantum vacuum quantized Einstein equation |
| url | https://www.mdpi.com/1099-4300/26/12/1042 |
| work_keys_str_mv | AT emiliosantos effectsofthequantumvacuumatacosmicscaleandofdarkenergy |