B-Modes Beyond
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Chern-Simons coupling finds a potential role in various cosmological scenarios
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QCD Axion
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Quintessence
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Chromo-Natural Inflation
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Warm Inflation
… with implications for B-mode polarization
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Cosmic scalar coupled to EM via axion-like coupling
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Time / Space dependence causes linear polarization rotation,
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Quintessence evolution: isotropic ( ), anisotropic ( )
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Signals:
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See talk by Clara Verges
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Mechanism: Inflaton coupled to SU(2) vev via axion-like coupling
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Chromo-Natural: Inflate on a steep potential
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Amplify chiral GWs with tensor excitations of vector field,
produce EB, TB correlations
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Are B-modes due to QM fluctuations of gravitational or vector field?
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Some References:
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Cosmic parity violation: Gluscevic et al, 1002.1308
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Chromo natural inflation: Adshead et al, 1202.2366
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Minimal warm inflation: Berhaus et al, 1910.07525
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CMB birefringence from ultra-light axion strings: Jain et al, 2103.10962
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Chiral GWs figure: RC et al, 1706.03765
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Review: RC, IJMPD 25 (1640011) 2016
Cosmic implications of scalar and gravitational birefringence, as well as the role of chirality in various cosmological scenarios. Discover the connection between axion-like couplings, linear polarization rotation, and potential signals for B-mode polarization. References provided for further exploration
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Presentation Transcript
B-Modes Beyond r Cosmic Birefringence and Chirality Robert Caldwell (he/him/his)
Cosmic Scalar Chern-Simons coupling finds a potential role in various cosmological scenarios QCD Axion Quintessence Chromo-Natural Inflation Warm Inflation with implications for B-mode polarization 2
Cosmic Birefringence Cosmic scalar coupled to EM via axion-like coupling Time / Space dependence causes linear polarization rotation, Quintessence evolution: isotropic ( ), anisotropic ( ) Signals: See talk by Clara Verges 3
Gravitational Birefringence Mechanism: Inflaton coupled to SU(2) vev via axion-like coupling Chromo-Natural: Inflate on a steep potential Amplify chiral GWs with tensor excitations of vector field, produce EB, TB correlations Are B-modes due to QM fluctuations of gravitational or vector field? 4
Cosmic Scalar Some References: Cosmic parity violation: Gluscevicet al, 1002.1308 Chromo natural inflation: Adshead et al, 1202.2366 Minimal warm inflation: Berhaus et al, 1910.07525 CMB birefringence from ultra-light axion strings: Jain et al, 2103.10962 Chiral GWs figure: RC et al, 1706.03765 Review: RC, IJMPD 25 (1640011) 2016 5
