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Cluster Abundance Constraints for Cosmological Models with a Time-varying, Spatially Inhomogeneous Energy Component with Negative Pressure

- Limin Wang, P. Steinhardt
- Physics
- 1 December 1998

The abundance of rich clusters is a strong constraint on the mass power spectrum. The current constraint can be expressed in the form ? -->8 ?${γ}m$ -->=0.5?0.1, where ?8 is the rms mass fluctuation… Expand

Bond-orientational order in liquids and glasses

- P. Steinhardt, D. Nelson, M. Ronchetti
- Materials Science
- 15 July 1983

Bond-orientational order in molecular-dynamics simulations of supercooled liquids and in models of metallic glasses is studied. Quadratic and third-order invariants formed from bond spherical… Expand

The observational case for a low-density Universe with a non-zero cosmological constant

- J. Ostriker, P. Steinhardt
- Physics
- Nature
- 1995

OBSERVATIONS are providing progressively tighter constraints on cosmological models advanced to explain the formation of large-scale structure in the Universe. These include recent determinations of… Expand

Cluster Abundance Constraints on Quintessence Models

- Limin Wang, P. Steinhardt
- Physics
- 2 April 1998

The abundance of rich clusters is a strong constraint on the mass power spectrum. The current constraint can be expressed in the form $\sigma_8 \Omega_m^{\gamma} = 0.5 \pm 0.1$ where $\sigma_8$ is… Expand

The Ekpyrotic universe: Colliding branes and the origin of the hot big bang

- J. Khoury, B. Ovrut, P. Steinhardt, N. Turok
- Physics
- 29 March 2001

We propose a cosmological scenario in which the hot big bang universe is produced by the collision of a brane in the bulk space with a bounding orbifold plane, beginning from an otherwise cold,… Expand

Cosmology - The cosmic triangle: Revealing the state of the universe

- N. Bahcall, J. Ostriker, S. Perlmutter, P. Steinhardt
- Physics
- 7 May 1999

The cosmic triangle is introduced as a way of representing the past, present and future status of the universe. Our current location within the cosmic triangle is determined by the answers to three… Expand

Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking

- A. Albrecht, P. Steinhardt
- Physics
- 26 April 1982

The treatment of first-order phase transitions for standard grand unified theories is shown to break down for models with radiatively induced spontaneous symmetry breaking. It is argued that proper… Expand

Cosmic Concordance and Quintessence

- Limin Wang, R. Caldwell, J. Ostriker, P. Steinhardt
- Physics
- 27 January 1999

We present a comprehensive study of the observational constraints on spatially flat cosmological models containing a mixture of matter and quintessence—a time-varying, spatially inhomogeneous… Expand

From big crunch to big bang

- J. Khoury, B. Ovrut, N. Seiberg, P. Steinhardt, N. Turok
- Physics
- 24 August 2001

We consider conditions under which a universe contracting towards a big crunch can make a transition to an expanding big bang universe. A promising example is 11-dimensional M-theory in which the… Expand

Cosmological imprint of an energy component with general equation of state

- R. Caldwell, R. Dave, P. Steinhardt
- Physics
- 7 August 1997

We examine the possibility that a significant component of the energy density of the Universe has an equation of state different from that of matter, radiation, or cosmological constant ({Lambda} ).… Expand

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