378 citations · 1.6k across the 30 of their papers we have counts for
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On Non-Canonical Kinetic Terms and the Tilt of the Power Spectrum
Sera Cremonini, Zygmunt Lalak, Krzysztof Turzynski
We argue that in models of inflation with two scalar fields and non-canonical kinetic terms there is a possibility of obtaining a red tilt of the power spectrum of curvature pertur…
Energy Transfer in Multi Field Inflation and Cosmological Perturbations
Amjad Ashoorioon, Axel Krause, Krzysztof Turzynski
In cascade inflation and some other string inflation models, collisions of mobile branes with other branes or orbifold planes occur and lead to interesting cosmological signatures.…
Back-door fine-tuning in supersymmetric low scale inflation
Z. Lalak, K. Turzynski
Low scale inflation has many virtues and it has been claimed that its natural realisation in supersymmetric standard model can be achieved rather easily. In this letter we have dem…
Curvature and isocurvature perturbations in two-field inflation
Z. Lalak, D. Langlois, S. Pokorski +1
We study cosmological perturbations in two-field inflation, allowing for non-standard kinetic terms. We calculate analytically the spectra of curvature and isocurvature modes at Hu…
The Price of WMAP Inflation in Supergravity
J. Ellis, Z. Lalak, S. Pokorski +1
The three-year data from WMAP are in stunning agreement with the simplest possible quadratic potential for chaotic inflation, as well as with new or symmetry-breaking inflation. We…