ON TOPOLOGICAL DEFECTS AND COSMOLOGICAL CONSTANT

2013/02/12 by B. Raychaudhuri, B. RAYCHAUDHURI, F. Rahaman +3 · 1 citation
Physics and Astronomy · #Constant (computer programming) #Cosmological constant #Cosmology and Gravitation Theories #Dark energy #De Sitter universe #Einstein field equations #Field (mathematics) #Magnetic monopole #Metric expansion of space #Quantum and Classical Electrodynamics #Relativity and Gravitational Theory #Topological defect #Universe #physics.gen-ph

paper · pdf · doi:10.1142/s0217732314500072

arxiv created 2013/02/12 · openalex publication_date 2014/01/07 · arxiv updated 2015/06/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Einstein introduced cosmological constant in his field equations in an ad hoc manner. Cosmological constant plays the role of vacuum energy of the universe which is responsible for the accelerating expansion of the universe. To give a theoretical support, it remains an elusive goal to modern physicists. We provide a prescription to obtain cosmological constant from the phase transitions of the early universe when topological defects, namely monopole might have existed.

Citations

• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• The cosmological constant and dark energy
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters
• Topology of cosmic domains and strings

Cited by

• Topological Structure of the Vacuum, Cosmological Constant and Dark Energy

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