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Introduction to Quantum Effects in Gravity

- V. Mukhanov, S. Winitzki
- Physics
- 25 June 2007

This book, first published in 2007, is an introductory textbook on quantum field theory in gravitational backgrounds intended for undergraduate and beginning graduate students in the fields of… Expand

Probabilities in the inflationary multiverse

- J. Garriga, Delia Schwartz-Perlov, A. Vilenkin, S. Winitzki
- Mathematics
- 23 September 2005

Inflationary cosmology leads to the picture of a 'multiverse', involving an infinite number of (spatially infinite) post-inflationary thermalized regions, called pocket universes. In the context of… Expand

Uniform Approximations for Transcendental Functions

- S. Winitzki
- MathematicsICCSA
- 18 May 2003

TLDR

Minkowski functional description of microwave background Gaussianity

- S. Winitzki, A. Kosowsky
- Mathematics
- 15 October 1997

Probability distribution for omega in open universe inflation

- A. Vilenkin, S. Winitzki
- Physics
- 30 May 1996

The problem of making predictions in eternally inflating universe that thermalizes by bubble nucleation is considered. A recently introduced regularization procedure is applied to find the… Expand

Effective noise in stochastic description of inflation

- S. Winitzki, A. Vilenkin
- Physics
- 8 November 1999

Stochastic description of inflationary spacetimes emulates the growth of vacuum fluctuations by an effective stochastic ``noise field'' which drives the dynamics of the volume-smoothed inflaton. We… Expand

Null energy condition violations in eternal inflation

- S. Winitzki
- Physics
- 30 November 2001

The usual scenario of ``eternal inflation'' involves an approximately de Sitter spacetime undergoing upward fluctuations of the local expansion rate $H$. This spacetime requires frequent violations… Expand

Computing the Incomplete Gamma Function to Arbitrary Precision

- S. Winitzki
- Mathematics, Computer ScienceICCSA
- 18 May 2003

TLDR

Cosmological particle production and the precision of the WKB approximation

- S. Winitzki
- Physics
- 1 October 2005

Particle production by slow-changing gravitational fields is usually described using quantum field theory in curved spacetime. Calculations require a definition of the vacuum state, which can be… Expand

Signatures of kinetic and magnetic helicity in the cosmic microwave background radiation

- L. Pogosian, T. Vachaspati, S. Winitzki
- Physics
- 21 March 2002

$P$ and $\mathrm{CP}$ violation in cosmology can be manifested as large-scale helical velocity flows in the ambient plasma and as primordial helical magnetic fields. We show that kinetic helicity at… Expand

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