85 citations · 240 across the 12 of their papers we have counts for
12 papers
Effective Dynamics of Inflationary End-of-the-World Branes in AdS
Kosei Fujiki, Michitaka Kohara, Jason Kristiano +2
We develop an effective description of a two-dimensional cosmological end-of-the-world brane embedded in AdS, with a scalar field localized on the brane. Integrating out bulk d…
Inflationary background renormalization
Jason Kristiano, Jun'ichi Yokoyama
In cosmic inflation, non-linearities of the curvature perturbation can induce backreaction to the background. To obtain observational predictions at non-linear order on the correct…
Generating large primordial fluctuations in single-field inflation for PBH formation
Jason Kristiano, Jun'ichi Yokoyama
In order to produce appreciable amount of primordial black holes (PBHs), the square amplitude of curvature perturbation must take a large value of , namely, seve…
Comparing sharp and smooth transitions of the second slow-roll parameter in single-field inflation
Jason Kristiano, Jun'ichi Yokoyama
In single-field inflation, violation of the slow-roll approximation can lead to growth of curvature perturbation outside the horizon. This violation is characterized by a period wi…
Note on the bispectrum and one-loop corrections in single-field inflation with primordial black hole formation
Jason Kristiano, Jun'ichi Yokoyama
Primordial black holes can be formed from the collapse of large-amplitude perturbation on small scales in the early Universe. Such an enhanced spectrum can be realized by introduci…
Constraining Primordial Black Hole Formation from Single-Field Inflation
Jason Kristiano, Jun'ichi Yokoyama
The most widely studied formation mechanism of a primordial black hole is collapse of large-amplitude perturbation on small scales generated in single-field inflation. In this Lett…
Perturbative region on non-Gaussian parameter space in single-field inflation
Jason Kristiano, Jun'ichi Yokoyama
We calculate one-loop correction to the two-point functions of curvature perturbation in single-field inflation generated by cubic self-interaction. Incorporating the observed red-…
Why Must Primordial Non-Gaussianity Be Very Small?
Jason Kristiano, Jun'ichi Yokoyama
One-loop correction to the power spectrum in generic single-field inflation is calculated by using standard perturbation theory. Because of the enhancement inversely proportional t…
Pure spin-3/2 representation with consistent interactions
T. Mart, J. Kristiano, S. Clymton
We have investigated the use of pure spin-3/2 propagator with consistent interaction Lagrangians to describe the property of spin-3/2 resonance. For this purpose we use the antisym…
Magnetic Tip Trap System
Oki Gunawan, Jason Kristiano, Hendra Kwee
We report a detailed theoretical model of recently-demonstrated magnetic trap system based on a pair of magnetic tips. The model takes into account key parameters such as tip diame…
Coleman-de Luccia Tunneling Wave Function
J. Kristiano, R. D. Lambaga, H. S. Ramadhan
We revisit the famous Coleman-de Luccia formalism for decay of false vacuum in gravitational theory. Since the corresponding wave function is time-independent we argue that its ins…
Pure spin-3/2 propagator for use in particle and nuclear physics
J. Kristiano, S. Clymton, T. Mart
We propose the use of pure spin-3/2 propagator in the representation in particle and nuclear physics. To formulate the propagator in a covariant form we us…