New Inflation
In 1981, Andrei Linde developed another version of inflationary theory, which he called "new inflation." He demonstrated that the exponentially rapid expansion of the universe could occur not only in the false vacuum, but also during a slow transition away from the false vacuum. This theory resolved the problems of the original model proposed by Guth, while preserving most of its attractive features. A few months later, a similar scenario was proposed by Albrecht and Steinhardt, with a reference to the paper by Linde. Soon after that, it was realized that the new inflationary scenario also suffered from some problems. Most of them arose because of the standard assumption that the early universe initially was very hot, and inflation occurred during the cosmological phase transitions.
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