Supersymmetric Models of Cosmic Inflation
Summary
Cosmic inflation posits a brief epoch of accelerated expansion in the early Universe, resolving the horizon and flatness puzzles while laying down the primordial density fluctuations that seed cosmic structure. Embedding inflation within supersymmetry (SUSY) and its local extension, supergravity (SUGRA), offers a framework in which radiative corrections remain under control and Planck‐scale corrections can be tamed. Supersymmetric models exploit F-term and D-term potentials, often supplemented by no-scale Kähler geometries, to achieve a naturally flat inflaton potential and to circumvent the η problem. Hybrid constructions allow inflation to end via a rapid symmetry-breaking transition, linking the inflationary epoch to grand unified theories and offering mechanisms for baryogenesis and dark matter genesis. No-scale scenarios, derivable from string compactifications, furnish de Sitter vacua with suppressed vacuum energy and spontaneous SUSY breaking, while Starobinsky-like embeddings in SUGRA deliver robust predictions for the scalar spectral index and tensor-to-scalar ratio. Beyond the minimal single-field approach, two-field and spectator-field frameworks enrich the phenomenology, enabling the study of non-Gaussianity, reheating dynamics, gravitino production and even primordial black–hole formation. These models thus form a bridge between high-energy particle physics and precision cosmology, guiding the interpretation of cosmic microwave background measurements and informing searches for supersymmetric relics in collider and dark matter experiments.
Research from Nature Portfolio
No recent Nature Portfolio content available.
Supersymmetric Models of Cosmic Inflation publication trend
The graph below shows the total number of articles in supersymmetric models of cosmic inflation across all publications each year (not limited to Nature Index journals).
Technical terms
Supersymmetry (SUSY): A symmetry relating bosons and fermions, invoked to stabilise scalar masses and control quantum corrections.
Inflaton: The hypothetical scalar field whose potential drives the inflationary expansion.
Supergravity (SUGRA): The local (gauged) extension of SUSY that includes gravity, used to build UV-sensitive inflationary models.
Kähler potential: A real function defining the kinetic terms of chiral superfields in SUSY and SUGRA frameworks.
Scalar spectral index (nₛ): A parameter characterising the scale dependence of primordial density fluctuations.
Tensor-to-scalar ratio (r): The relative amplitude of gravitational waves to density perturbations from inflation.
Reheating: The epoch following inflation during which the inflaton decays, repopulating the Universe with radiation and matter.
Gravitino: The fermionic superpartner of the graviton, a candidate for dark matter in SUSY scenarios.
References
- The role of vectors in reheating. Journal of Cosmology and Astroparticle Physics (2024).
- Observable r, gravitino dark matter, and non-thermal leptogenesis in no-scale supergravity. Journal of High Energy Physics (2023).
- Large curvature fluctuations from no-scale supergravity with a spectator field. Physics Letters B (2024).
About these summaries
This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.