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Summary: UCLEAR PHYSICS
PROCEEDINGS
SUPPLEMENTS
FI.SEVIER Nuclear Physics B (Proc. Suppl.) 43 (1995) 118-125
The Inflaton Potential from Present Day Observations
Edward W. Kolb,a* Mark Abney,b* Edmund Copeland, ct Andrew L. Liddle,c~ and James E. Lidseya*t
~NASA/Fermilab Theoretical Astrophysics Center, Fermi National Accelerator Laboratory
P.O. Box 500, Batavia, Illinois 60510-0500 USA
bDepartment of Physics, The Enrico Fermi Institute, The University of Chicago
5640 South Ellis Ave., Chicago, Illinois 60637 USA
CSchool of Mathematical and Physical Sciences, University of Sussex
Brighton BN1 9QH United Kingdom
Qumatum fluctuation during the inflationary phase in the early Universe should leave their imprint on the
present-day structure of the Universe. Here we discuss how to read this imprint in the cosmic microwave back-
ground and the large-scale structure of the Universe to discover something about the microphysics driving inflation.
1. INTRODUCTION
There are many models for cosmic inflation.
All of them involve a rapid growth of the size
of the Universe. This is most easily illustrated
by considering a homogeneous, isotropic Universe
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