6 papers
A tracker solution to the cold dark matter cosmic coincidence problem
Ivaylo Zlatev, Paul J. Steinhardt
Recently, we introduced the notion of "tracker fields," a form of quintessence which has an attractor-like solution. Using this concept, we showed how to construct models in which…
Cosmological Tracking Solutions
Paul J. Steinhardt, Limin Wang, Ivaylo Zlatev
A substantial fraction of the energy density of the universe may consist of quintessence in the form of a slowly-rolling scalar field. Since the energy density of the scalar field…
Quintessence, Cosmic Coincidence, and the Cosmological Constant
Ivaylo Zlatev, Limin Wang, Paul J. Steinhardt
Recent observations suggest that a large fraction of the energy density of the universe has negative pressure. One explanation is vacuum energy density; another is quintessence in…
Parametric Resonance in an Expanding Universe
Ivaylo Zlatev, Greg Huey, Paul J. Steinhardt
Parametric resonance has been discussed as a mechanism for copious particle production following inflation. Here we present a simple and intuitive calculational method for estimati…
From Heisenberg matrix mechanics to EBK quantization: theory and first applications
Wm. R. Greenberg, Abraham Klein, Ivalyo Zlatev +1
Despite the seminal connection between classical multiply-periodic motion and Heisenberg matrix mechanics and the massive amount of work done on the associated problem of semiclass…
Is Schrödinger's Conjecture for the Hydrogen Atom Coherent States Attainable
Ivaylo Zlatev, Wei-Min Zhang, Da Hsuan Feng
We construct the most general SO(4,2) hydrogen atom coherent states which are the counterpart of Schrödinger's harmonic oscillator coherent states. We show that these states cannot…