Staff Profile
Dr Gerasimos Rigopoulos
Senior Lecturer in Applied Mathematics/Theoretical Physics
- Email: gerasimos.rigopoulos@ncl.ac.uk
- Telephone: +44 (0) 191 208 8019
Background
Roles and Responsibilities
Roles and Responsibilities
Research
Research Interests
Early Universe Cosmology: Inflation, quantum theory of inflationary perturbations and its stochastic formulation, quantum fields in DeSitter and quasi-DeSitter, implications for quantum gravity.
Late Universe Cosmology: Effective theories of cosmological perturbations, semi-analytic methods for the quasi-linear and non-linear regime of structure formation.
Postgraduate supervision
Kate Marshall (co-supervised with Ian Moss)
Marios Bounakis (co-supervised with Ian Moss)
Teaching
Semester 2:
PHY1029: Multivariate calculus and differential equations
PHY8038: General Relativity
Publications
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Articles
- Liu IK, Proukakis NP, Rigopoulos G. Coherent and incoherent structures in fuzzy dakr matter haloes. Monthly Notices of the Royal Astronomical Society 2023, 521(3), 3625–3647.
- Prokopec T, Rigopoulos G. ΔN and the stochastic conveyor belt of ultra slow-roll inflation. Physical Review D 2021, 104(8), 083505.
- Bounakis M, Moss IG, Rigopoulos G. Observational constraints on Hyperinflation. Journal of Cosmology and Astroparticle Physics 2021, 2021(02), 006.
- Bounakis M, Rigopoulos G. Feynman rules for stochastic inflationary correlators. Journal of Cosmology and Astroparticle Physics 2020, 2020(5), 046.
- Prokopec T, Rigopoulos G. Functional Renormalization Group for Stochastic Inflation. Journal of Cosmology and Astroparticle Physics 2018, 2018(08), 13.
- Moss IG, Rigopoulos G. Effective long wavelength scalar dynamics in de Sitter. Journal of Cosmology and Astroparticle Physics 2017, 2017(5), 009.
- Rigopoulos G. Thermal Interpretation of Infrared Dynamics in de Sitter. Journal of Cosmology and Astroparticle Physics 2016, 2016(07), 035.
- Führer F, Rigopoulos G. Renormalizing a Viscous Fluid Model for Large Scale Structure Formation. Journal of Cosmology and Astroparticle Physics 2016, 2016, 032.
- Rigopoulos G. The adhesion model as a field theory for cosmological clustering. Journal of Cosmology and Astroparticle Physics 2015, 01(2015), 014.
- Rigopoulos G, Valkenburg W. On the accuracy of N-body simulations at very large scales. Monthly Notices of the Royal Astronomical Society 2015, 446(1), 677-682.
- Garbrecht B, Gautier F, Rigopoulos G, Zhu Y. Feynman diagrams for stochastic inflation and quantum field theory in de Sitter space. Physical Review D 2015, 91(6), 063520.
- Garbrecht B, Rigopoulos G, Zhu Y. Infrared correlations in de Sitter space: Field theoretic versus stochastic approach. Physical Review D 2014, 89, 063506.
- Rampf C, Rigopoulos G, Valkenburg W. A relativistic view on large scale N-body simulations. Classical and Quantum Gravity 2014, 31(23), 234004.
- Rampf C, Rigopoulos G. Zel'dovich approximation and General Relativity. Monthly Notices of the Royal Astronomical Society Letters 2013, 430(1), L54-L58.
- Rampf C, Rigopoulos G. Initial conditions for cold dark matter particles and General Relativity. Physical Review D 2013, 87(12), 123525.
- Rigopoulos G. Fluctuation-dissipation and equilibrium for scalar fields in de Sitter. 2013.
- Enqvist K, Koivisto T, Rigopoulos G. Non-metric chaotic inflation. Journal of Cosmology and Astroparticle Physics 2012, 05(2012), 023.
- Enqvist K, Figueroa DG, Rigopoulos G. Fluctuations along supersymmetric flat directions during Inflation. Journal of Cosmology and Astroparticle Physics 2012, 01(2012), 053.
- Rigopoulos G, Valkenburg W. A non-linear approximation for perturbations in LCDM. Physical Review D 2012, 86, 043523.
- Enqvist K, Hotchkiss S, Rigopoulos G. A gradient expansion for cosmological backreaction. Journal of Cosmology and Astroparticle Physics 2012, 03, 026.
- Garbrecht B, Rigopoulos G. Self Regulation of Infrared Correlations for Massless Scalar Fields during Inflation. Physical Review D 2011, 84, 063516.
- Enqvist K, Rigopoulos G. Non-linear mode coupling and the growth of perturbations in LCDM. Journal of Cosmology and Astroparticle Physics 2011, 03(2011), 005.
- Rigopoulos G. Gauge invariance and non-Gaussianity in Inflation. Physical Review D 2011, 84, 021301.
- Prokopec T, Rigopoulos G. Path Integral for Inflationary Perturbations. Physical Review D 2010, 82, 023529.
- Enqvist K, Nurmi S, Rigopoulos G, Taanila O, Takahashi T. The Subdominant Curvaton. Journal of Cosmology and Astroparticle Physics 2009, 11(2009), 003.
- Enqvist K, Mattsson M, Rigopoulos G. Supernovae data and perturbative deviation from homogeneity. Journal of Cosmology and Astroparticle Physics 2009, 09(2009), 022.
- Koksma JF, Prokopec T, Rigopoulos G. The Scalar Field Kernel in Cosmological Spaces. Classical and Quantum Gravity 2008, 25, 125009.
- Enqvist K, Nurmi S, Rigopoulos G. Parametric Decay of the Curvaton. Journal of Cosmology and Astroparticle Physics 2008, 10(2008), 013.
- Enqvist K, Nurmi S, Podolsky D, Rigopoulos G. On the divergences of inflationary superhorizon perturbations. Journal of Cosmology and Astroparticle Physics 2008, 04(2008), 025.
- Rigopoulos G, Shellard EPS, vanTent BJW. Quantitative bispectra from multifield inflation. Physical Review D 2007, 76, 083512.
- Prokopec T, Rigopoulos G. Decoherence from Isocurvature Perturbations in Inflation. Journal of Cosmology and Astroparticle Physics 2007, 11(2007), 029.
- Rigopoulos G, Shellard EPS, vanTent BJW. Non-linear perturbations in multiple-field inflation. Physical Review D 2006, 73, 083521.
- Rigopoulos G, Shellard EPS. Stochastic fluctuations in multi-field inflation. Journal of Physics, Conference Series 2005, 8, 145-149.
- Rigopoulos G, Shellard EPS, vanTent BJW. Simple route to non-Gaussianity in inflation. Physical Review D 2005, 72, 083507.
- Rigopoulos G, Shellard EPS. Non-linear inflationary perturbations. Journal of Cosmology and Astroparticle Physics 2005, 10(2005), 006.
- Rigopoulos G, Shellard EPS, vanTent BJW. Large non-Gaussianity in multiple-field inflation. Physical Review D 2005, 73, 083522.
- Rigopoulos G. On second-order superhorizon perturbations in multifield inflationary models. Classical and Quantum Gravity 2004, 21, 1737-1754.
- Rigopoulos G, Shellard EPS. Separate universe approach and the evolution of nonlinear superhorizon cosmological perturbations. Physical Review D 2003, 68, 123518.
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Conference Proceedings (inc. Abstract)
- Wilkins A, Masoero E, Rigopoulos G. Renormalisation Group theory to accelerate molecular dynamics simulations. In: EMI International 2020. 2020, Durham, UK.