©2018 Stephon Alexander Theory Lab

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Publications

Hidden-Sector Modifications to Gravitational Waves From Binary Inspirals 
Stephon AlexanderEvan McDonoughRobert Sims (Brown U.), Nicolas Yunes (Montana State U., Bozeman). Aug 15, 2018. 18 pp. 
e-Print: arXiv:1808.05286 [gr-qc] | PDF

The quantum cosmological constant 
Stephon AlexanderJoao MagueijoLee Smolin (Brown U. & Imperial Coll., London & Perimeter Inst. Theor. Phys.). Jul 3, 2018. 15 pp. 
e-Print: arXiv:1807.01381 [gr-qc] | PDF

Observable Chiral Gravitational Waves from Inflation in String Theory 
Evan McDonoughStephon Alexander (Brown U.). Jun 14, 2018. 12 pp. 
e-Print: arXiv:1806.05684 [hep-th] | PDF

The Equivalence Principle and the Emergence of Flat Rotation Curves 
Stephon Alexander (Brown U.), Lee Smolin (Perimeter Inst. Theor. Phys.). Apr 25, 2018. 10 pp. 
e-Print: arXiv:1804.09573 [gr-qc] | PDF

Chiral Gravitational Waves and Baryon Superfluid Dark Matter 
Stephon AlexanderEvan McDonough (Brown U.), David N. Spergel (Princeton U., Astrophys. Sci. Dept. & Flatiron Inst., New York). Jan 22, 2018. 11 pp. 
Published in JCAP 1805 (2018) no.05, 003 
DOI: 10.1088/1475-7516/2018/05/003 
e-Print: arXiv:1801.07255 [hep-th] | PDF

Gravitational wave probes of parity violation in compact binary coalescences 
Stephon H. Alexander (Brown U.), Nicolas Yunes (Montana State U.). Dec 5, 2017. 6 pp. 
Published in Phys.Rev. D97 (2018) no.6, 064033 
DOI: 10.1103/PhysRevD.97.064033 
e-Print: arXiv:1712.01853 [gr-qc] | PDF

On the Classical and Quantum Stability of a Cosmic Ghost 
Stephon Alexander (Brown U.), Sam Cormack (Dartmouth Coll.), David Lowe (Brown U.), Robert Sims (Dartmouth Coll.). Jul 10, 2017. 12 pp. 
e-Print: arXiv:1707.02943 [gr-qc] | PDF

On a Relation of Vacuum Energy to the Hierarchy of Forces 
Stephon Alexander (Brown U.), Laura Mersini-Houghton (UNC, Chapel Hill). May 30, 2017. 7 pp. 
e-Print: arXiv:1705.10773 [gr-qc] | PDF

V-mode Polarization in Axion Inflation and Preheating 
Stephon Alexander (Brown U.), Evan McDonough (McGill U.), Robert Sims (Brown U.). Apr 3, 2017. 15 pp. 
Published in Phys.Rev. D96 (2017) no.6, 063506 
DOI: 10.1103/PhysRevD.96.063506 
e-Print: arXiv:1704.00838 [gr-qc] | PDF

Space-time convex functions and sectional curvature 
Stephanie B. AlexanderWilliam A. Karr. Feb 8, 2017. 11 pp. 
e-Print: arXiv:1702.02652 [math.DG] | PDF

Detecting axions via induced electron spin precession 
Stephon AlexanderRobert Sims (Brown U.). Feb 5, 2017. 5 pp. 
Published in Phys.Rev. D98 (2018) no.1, 015011 
DOI: 10.1103/PhysRevD.98.015011 
e-Print: arXiv:1702.01459 [hep-ph] | PDF

13.Constraints on Vacuum Energy from Structure Formation and Nucleosynthesis 
Fred C. AdamsStephon AlexanderEvan GrohsLaura Mersini-Houghton. Jan 14, 2017. 16 pp. 
Published in JCAP 1703 (2017) no.03, 021 
DOI: 10.1088/1475-7516/2017/03/021 
e-Print: arXiv:1701.03949 [astro-ph.CO] | PDF

My Journey Into the Physics of David Finkelstein 
Stephon Alexander. 2017. 9 pp. 
Published in Int.J.Theor.Phys. 56 (2017) no.1, 88-96 
DOI: 10.1007/s10773-016-3169-6

Dark matter and baryogenesis in the Fermi-bounce curvaton mechanism 
Andrea Addazi (Gran Sasso & L'Aquila U.), Stephon Alexander (Brown U.), Yi-Fu Cai (Hefei, CUST), Antonino Marciano (Fudan U.). Dec 2, 2016. 14 pp. 
Published in Chin.Phys. C42 (2018) no.6, 065101 
DOI: 10.1088/1674-1137/42/6/065101 
e-Print: arXiv:1612.00632 [gr-qc] | PDF

Dark Energy and Dark Matter in a Model of an Axion Coupled to a Non-Abelian Gauge Field 
Stephon Alexander (Brown U.), Robert Brandenberger (McGill U. & Zurich, ETH), Juerg Froehlich (Zurich, ETH). Sep 22, 2016. 11 pp. 
e-Print: arXiv:1609.06920 [hep-th] | PDF

Gravitationally bound BCS state as dark matter 
Stephon Alexander (Brown U.), Sam Cormack (Dartmouth Coll.). Jul 28, 2016. 18 pp. 
Published in JCAP 1704 (2017) no.04, 005 
DOI: 10.1088/1475-7516/2017/04/005 
e-Print: arXiv:1607.08621 [astro-ph.CO] | PDF

Chirality and Circular Polarization in Models of Inflation 
Stephon Alexander (Brown U.), Sam CormackRobert Sims (Dartmouth Coll.). Jun 16, 2016. 16 pp. 
e-Print: arXiv:1606.05357 [astro-ph.CO] | PDF

Inflationary Birefringence and Baryogenesis 
Stephon H. S. Alexander (Brown U.). Apr 3, 2016. 7 pp. 
Published in Int.J.Mod.Phys. D25 (2016) no.11, 1640013 
DOI: 10.1142/S0218271816400137 
e-Print: arXiv:1604.00703 [hep-th] | PDF

A Unified picture of Dark Matter and Dark Energy from Invisible QCD 
Andrea Addazi (Gran Sasso & L'Aquila U.), Antonino Marciano (Fudan U.), Stephon Alexander (Brown U.). Mar 6, 2016. 9 pp. 
e-Print: arXiv:1603.01853 [gr-qc] | PDF

Turning on gravity with the Higgs mechanism 
Stephon Alexander (Brown U.), John D. Barrow (Cambridge U., DAMTP), João Magueijo (Imperial Coll., London). Feb 25, 2016. 7 pp. 
Published in Class.Quant.Grav. 33 (2016) no.14, 14LT01 
DOI: 10.1088/0264-9381/33/14/14LT01 
e-Print: arXiv:1602.07993 [gr-qc] | PDF

Invisible QCD as Dark Energy 
Stephon Alexander (Brown U.), Antonino MarcianòZhi Yang (Fudan U.). Feb 21, 2016. 5 pp. 
e-Print: arXiv:1602.06557 [hep-th] | PDF

Inflation and the quantum measurement problem 
Stephon Alexander (Brown U.), Dhrubo Jyoti (Dartmouth Coll.), Joao Magueijo (Imperial Coll., London). Feb 3, 2016. 5 pp. 
Published in Phys.Rev. D94 (2016) no.4, 043502 
DOI: 10.1103/PhysRevD.94.043502 
e-Print: arXiv:1602.01216 [gr-qc] | PDF

Enhanced color gauge invariance and a new di-photon state at the LHC 
Stephon Alexander (Brown U.), Lee Smolin (Perimeter Inst. Theor. Phys.). Jan 12, 2016. 14 pp. 
e-Print: arXiv:1601.03091 [hep-ph] | PDF

Tracking Dark Energy from Axion-Gauge Field Couplings 
Stephon Alexander (Brown U.), Robert Brandenberger (McGill U. & Zurich, ETH), Juerg Froehlich (Zurich, ETH). Jan 1, 2016. 9 pp. 
e-Print: arXiv:1601.00057 [hep-th] | PDF

A Cyclic Universe Approach to Fine Tuning 
Stephon AlexanderSam CormackMarcelo Gleiser (Dartmouth Coll.). Jul 2, 2015. 4 pp. 
Published in Phys.Lett. B757 (2016) 247-250 
DOI: 10.1016/j.physletb.2016.03.082 
e-Print: arXiv:1507.00727 [hep-th] | PDF

Dynamics of Gauge Field Inflation 
Stephon AlexanderDhrubo Jyoti (Dartmouth Coll.), Arthur Kosowsky (Pittsburgh U.), Antonino Marciano (Fudan U.). Aug 18, 2014. 14 pp. 
Published in JCAP 1505 (2015) 005 
DOI: 10.1088/1475-7516/2015/05/005 
e-Print: arXiv:1408.4118 [hep-th] | PDF

Fermi-bounce cosmology and the fermion curvaton mechanism 
Stephon Alexander (Dartmouth Coll.), Yi-Fu Cai (McGill U.), Antonino Marciano (Fudan U.). Jun 5, 2014. 8 pp. 
Published in Phys.Lett. B745 (2015) 97-104 
DOI: 10.1016/j.physletb.2015.04.026 
e-Print: arXiv:1406.1456 [gr-qc] | PDF

Gravitational-Wave Mediated Preheating 
Stephon AlexanderSam Cormack (Dartmouth Coll.), Antonino Marcianò (Fudan U.), Nicolás Yunes (Montana State U. & Santa Barbara, KITP). May 16, 2014. 5 pp. 
Published in Phys.Lett. B743 (2015) 82-86 
NSF-KITP-14-047 
DOI: 10.1016/j.physletb.2015.02.018 
e-Print: arXiv:1405.4288 [gr-qc] | PDF

Fermi-bounce Cosmology and scale invariant power-spectrum 
Stephon Alexander (Dartmouth Coll.), Cosimo BambiAntonino MarcianoLeonardo Modesto (Fudan U.). Feb 24, 2014. 7 pp. 
Published in Phys.Rev. D90 (2014) no.12, 123510 
DOI: 10.1103/PhysRevD.90.123510 
e-Print: arXiv:1402.5880 [gr-qc] | PDF

The Sterile Neutrino Field and Late Time Acceleration 
Stephon H. S. Alexander (Dartmouth Coll.). Jun 12, 2013. 5 pp. 
e-Print: arXiv:1306.2964 [hep-ph] | PDF

Gravitational origin of the weak interaction’s chirality 
Stephon AlexanderAntonino Marciano (Dartmouth Coll.), Lee Smolin (Perimeter Inst. Theor. Phys.). Dec 2012. 13 pp. 
Published in Phys.Rev. D89 (2014) no.6, 065017 
DOI: 10.1103/PhysRevD.89.065017 
e-Print: arXiv:1212.5246 [hep-th] | PDF

 

Electric Time in Quantum Cosmology 
Stephon Alexander (Dartmouth Coll.), Martin Bojowald (Penn State U.), Antonino Marciano (Dartmouth Coll.), David Simpson (Penn State U.). Dec 2012. 19 pp. 
Published in Class.Quant.Grav. 30 (2013) 155024 
DOI: 10.1088/0264-9381/30/15/155024 
e-Print: arXiv:1212.2204 [gr-qc] | PDF

Horava-Lifshitz theory as a Fermionic Aether in Ashtekar gravity 
Stephon Alexander (Dartmouth Coll.), Joao Magueijo (Imperial Coll., London), Antonino Marciano (Haverford Coll. & Princeton U.). Jun 2012. 
Published in Phys.Rev. D86 (2012) 064025 
DOI: 10.1103/PhysRevD.86.064025 
e-Print: arXiv:1206.6296 [hep-th] | PDF

The Hidden Quantum Groups Symmetry of Super-renormalizable Gravity 
Stephon Alexander (Haverford Coll. & Princeton U. & Penn State U.), Antonino Marciano (Haverford Coll. & Princeton U.), Leonardo Modesto (Perimeter Inst. Theor. Phys.). Feb 2012. 10 pp. 
Published in Phys.Rev. D85 (2012) 124030 
DOI: 10.1103/PhysRevD.85.124030 
e-Print: arXiv:1202.1824 [hep-th] | PDF

Chern-Simons Inflation and Baryogenesis 
Stephon Alexander (Haverford Coll. & Penn State U.), Antonino Marciano (Haverford Coll.), David Spergel (Princeton U.). Jul 2011. 7 pp. 
Published in JCAP 1304 (2013) 046 
DOI: 10.1088/1475-7516/2013/04/046 
e-Print: arXiv:1107.0318 [hep-th] | PDF

Towards a Loop Quantum Gravity and Yang–Mills unification 
Stephon Alexander (Haverford Coll. & Dartmouth Coll. & Princeton U. & Penn State U.), Antonino Marcianò (Haverford Coll. & Princeton U.), Ruggero Altair Tacchi (UC, Davis). May 2011. 4 pp. 
Published in Phys.Lett. B716 (2012) 330-333 
DOI: 10.1016/j.physletb.2012.07.034 
e-Print: arXiv:1105.3480 [gr-qc] | PDF

Testing gravitational parity violation with coincident gravitational waves and short gamma-ray bursts 
Nicolas Yunes (Princeton U. & Penn State U.), Richard O'Shaughnessy (Penn State U.), Benjamin J. Owen (Penn State U. & Hannover, Max Planck Inst. Grav.), Stephon Alexander (Penn State U. & Haverford Coll.). May 2010. 21 pp. 
Published in Phys.Rev. D82 (2010) 064017 
IGC-10-5-2 
DOI: 10.1103/PhysRevD.82.064017 
e-Print: arXiv:1005.3310 [gr-qc] | PDF

A Theory of Neutrino Oscillations and Late Time Acceleration 
Stephon H.S. Alexander (Haverford Coll.). Nov 2009. 6 pp. 
e-Print: arXiv:0911.5156 [hep-ph] | PDF

Chern-Simons Modified General Relativity 
Stephon Alexander (Haverford Coll. & Penn State U.), Nicolas Yunes (Princeton U. & Penn State U.). Jul 2009. 104 pp. 
Published in Phys.Rept. 480 (2009) 1-55 
DOI: 10.1016/j.physrep.2009.07.002 
e-Print: arXiv:0907.2562 [hep-th] | PDF

Cosmological Bardeen-Cooper-Schrieffer condensate as dark energy 
Stephon Alexander (Haverford Coll.), Tirthabir BiswasGianluca Calcagni (Penn State U.). Jun 2009. 21 pp. 
Published in Phys.Rev. D81 (2010) 043511, Erratum: Phys.Rev. D81 (2010) 069902 
IGC-09-6-3 
DOI: 10.1103/PhysRevD.81.04351110.1103/PhysRevD.81.069902 
e-Print: arXiv:0906.5161 [astro-ph.CO] | PDF

Cyclic Inflation 
Tirthabir Biswas (Penn State U.), Stephon Alexander (Penn State U. & Haverford Coll.). Dec 2008. 16 pp. 
Published in Phys.Rev. D80 (2009) 043511 
IGC-08-12-1 
DOI: 10.1103/PhysRevD.80.043511 
e-Print: arXiv:0812.3182 [hep-th] | PDF

Magnetic Fields from Heterotic Cosmic Strings 
Rhiannon Gwyn (McGill U.), Stephon H. Alexander (Penn State U.), Robert H. BrandenbergerKeshav Dasgupta (McGill U.). Nov 2008. 19 pp. 
Published in Phys.Rev. D79 (2009) 083502 
DOI: 10.1103/PhysRevD.79.083502 
e-Print: arXiv:0811.1993 [hep-th] | PDF

Generation of Circular Polarization of the Cosmic Microwave Background 
Stephon Alexander (Haverford Coll.), Joseph Ochoa (Penn State U.), Arthur Kosowsky (Pittsburgh U.). Oct 2008. 14 pp. 
Published in Phys.Rev. D79 (2009) 063524 
DOI: 10.1103/PhysRevD.79.063524 
e-Print: arXiv:0810.2355 [astro-ph] | PDF

The Cosmological BCS mechanism and the Big Bang Singularity 
Stephon Alexander (Haverford Coll. & Penn State U.), Tirthabir Biswas (Penn State U.). Jul 2008. 11 pp. 
Published in Phys.Rev. D80 (2009) 023501 
IGC-08-7-3 
DOI: 10.1103/PhysRevD.80.023501 
e-Print: arXiv:0807.4468 [hep-th] | PDF

Quantum gravity as a Fermi liquid 
Stephon H.S. Alexander (Penn State U. & Haverford Coll.), Gianluca Calcagni (Penn State U.). Jul 2008. 43 pp. 
Published in Found.Phys. 38 (2008) 1148-1184 
IGC-08-6-6 
DOI: 10.1007/s10701-008-9257-6 
e-Print: arXiv:0807.0225 [hep-th] | PDF

Superconducting loop quantum gravity and the cosmological constant 
Stephon H.S. Alexander (Penn State U. & Haverford Coll.), Gianluca Calcagni (Penn State U.). Jun 2008. 5 pp. 
Published in Phys.Lett. B672 (2009) 386-389 
IGC-08-6-5 
DOI: 10.1016/j.physletb.2009.01.046 
e-Print: arXiv:0806.4382 [hep-th] | PDF

Chern-Simons Modified Gravity as a Torsion Theory and its Interaction with Fermions 
Stephon AlexanderNicolas Yunes (Penn State U.). Apr 2008. 12 pp. 
Published in Phys.Rev. D77 (2008) 124040 
IGC-08-4-1 
DOI: 10.1103/PhysRevD.77.124040 
e-Print: arXiv:0804.1797 [gr-qc] | PDF

 

A Gravitational-wave probe of effective quantum gravity 
Stephon AlexanderLee Samuel FinnNicolas Yunes (Penn State U.). Dec 2007. 14 pp. 
Published in Phys.Rev. D78 (2008) 066005 
IGC-07-12-2 
DOI: 10.1103/PhysRevD.78.066005 
e-Print: arXiv:0712.2542 [gr-qc] | PDF